Outfitting Your Yurt

Energy Code

Word on the street is that the energy code is causing problems for yurt dwellers.

Some states in the US use the Uniform Building Code (UBC) but many states, provinces, and some countries use the ICC (International Code Council) rule books. The two ICC rulebooks are the IRC (International Residential Code) and IBC (International Building Code).

While the IBC establishes the basic requirements for exterior walls from a general building construction sense, the 2012 International Energy Conservation Code (IECC) goes further to address energy use in buildings.

ibc_iecc

The beauty of the family of codes prepared by the International Code Council (ICC) is the two codes have been painstakingly reviewed to complement and not contradict each other. The IECC uses a similar format and language to the IBC, but also acknowledges the need to coordinate requirements.

The IECC addresses energy efficiency on several fronts including cost savings, reduced energy usage, conservation of natural resources, and the impact of energy usage on the environment.

The building code terminology for the yurt is “membrane-covered frame structure.” In order to be permitted, a yurt must meet requirements in the areas of snow load, seismic rating, wind speed, and fires safety, dependent on location. Other requirements like egress (emergency exit) and occupancy are dependent on the use of the yurt (residential, rental, or commercial).

Building code officials have no problem with the above provisions, but they do have a problem with insulation. They are being pushed to comply more strictly than ever before with the energy code, which regulates building design for adequate thermal resistance and low air leakage.

For yurt dwellers, it all boils down to the insulation.

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They want the insulation to be R-38 in the roof and R-25 to R-35 in the side walls (depending on location it could be substantially higher or lower.) The reflective foil we offer is R-9 for a single layer and R-10 for double layer.

However, there is a provision in our favor: “it is intended that these provisions provide flexibility to permit the use of innovative approaches and techniques to achieve effective utilization of energy.”

If building officials see your yurt as a permanent residential dwelling, chances are they will want to regulate the energy code.

The good news is the code is not intended to restrict the use of materials, construction, design, or insulation system. But the construction, design, or insulation has to be approved by the code official.

I am hearing about building officials who are willing to work with yurt dwellers using alternative energy sources like solar power and hydro-radiant floor coils. They can be flexible … so getting on their good side form the start is essential!

Practical-Yurts1Yurt dweller Steven Hatch experienced this when he attempted to get a building permit for his yurt in rural Utah. He went to the local county building inspection department and asked what he needed to do to get a building permit for his new yurt. They gave him a checklist of the requirements he would need to satisfy in order to comply.

From there he went to the Planning and Zoning Committee. This was the key to Steven’s success! He claims in his book, Practical Yurts: Building and Living in a Low Cost Alternative Structure: “working with the Planning and Zoning Committee in a small, rural area was helpful to me getting my permit. I think one might have more difficulty in a larger urban area. I don’t know that for sure, but that is my feeling.”

Steven used Rainier Yurt’s engineer to get site specific engineered drawings, showing that the yurt exceeded wind speed requirements, met the seismic requirements, and exceeded the snow load requirements. After much back-and-forth with the permit office, he worked through the perc testing and sewer permit with the Health Department.

Living-In-the-Round-CoverSteven wrote: “The only issue remaining was how I was going to insulate the yurt. The building inspection people were thinking it needed R30 and R45 and it wasn’t going to meet that requirement.. I printed out a copy of Dana’s “Yurt Insulation” blog post that discussed the Radiant Barrier Insulation and gave them a copy of Becky Kemery’s book, Living in the Round, to study. I also directed them to the portion of the code dealing with membrane covered frame structures and let them work at their pace to study and approve the permit. It took them about a week and they gave me a call and told me to permit was ready to pick up.”

$1800 later, Steven was free to start construction of his Rainier Yurt.

My take away is don’t give up! If you are told there is no way you can get a permit for a yurt, ask what you NEED to do to get a permit and ask for their help.

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For example: explore the skylight and French doors options to get more natural light into the yurt during daylight hours, requiring less electricity. Discuss limited demand options for hot water, electricity, and lighting. It’s a yurt we are talking about, not grandma’s rambler!

Ask questions – lots of questions! Start with mobile homes in the area – what R value to they have? Why are they calculated differently from stick built houses, but yurts have to comply with the R-value of a permanent residence? Is a yurt less permanent than a doublewide? Be persistent, share, teach, listen, learn, discuss. Repeat!

A mutually beneficial outcome just might happen when you educate the permit official about yurts and radiant barrier insulation and empower their help to assist you with complying with an alternative energy code using site-recovered energy and on-site renewable energy. Use your enthusiasm to explain to the official that alternative, sustainable, off-the-grid options will benefit the planet far more than your low R-value yurt will hurt the planet.

Give me a call if you need encouragement as you head to City Hall.

Enjoy the journey!

~Dana

~Dana

Acknowledgments:
Yurts, Living in the Round by Becky Kemery
Practical Yurts by Steven Hatch
Architectural Record Continuing Education Center Article on IBC and IECC
2012 International Energy Conservation Code Requirements and Definitions: http://esl.tamu.edu/docs/terp/2012/2012%20IECC%20Significant%20Changes.pdf

Guest Post: Solar Hot Water

I have for you today another fabulous guest post by Ron Friedman. If you’ve been wondering about an efficient way to get hot water to your yurt, he has a solution for you – solar hot water!

Enjoy!

***

Solar heated hot water is an under-utilized technology, often overlooked due to our romance with solar electricity. But fuel for heating water is expensive and solar offers tremendous savings and payback times.

The systems for solar heated water usually include flat plate or evacuated tube systems that need a lot of room to capture enough useable solar radiation. Often the liquid in the system is used just to transfer the heat to the useable water in your hot water tank recirculating through a heat transfer system.

A new system is now being beta tested throughout the US that takes up a fraction of the space and delivers hot water directly to the tank. A company called Avalanche Energy, headed up by aerospace engineer Alex Pina, produces it. Their mantra is “solar for everyone.”

Evacuated tubes vs Thermal Square

Pictured here is the dish called the ThermalSquare. Flexible installation options mean that it is a viable option even if you live in a yurt. You can mount it to a pole or the ground, rather than the traditional roof mount. The system measures only 4’ x 4’ and will be available to the public in 2015.

SystemThe system is able to capture visible and infrared solar energy and move it directly to the useable hot water from the storage tank. In this graphic, you can see the solar first hitting the reflector #2 that directs the energy to reflector #3 before transferring to your water.

Depending upon how much water you require and your amount of solar capture, this system can replace your fossil fuel usage. The size of your storage tank will be critical. #4 in the graphic are pipes that feed the water directly into your storage tank.

Size your storage tank for the number of people that will use the water. For one to three people, I recommend a 60 gallon tank. For three to four people, an 80 gallon storage tank. If you have four to six people, you’ll want an even larger tank. Check the system for leaks. Just a tiny leak can have a huge impact on your hot water supply.

Comparing the ThermalSquare to other systems readily displays the benefits. This chart represents a California location with the incentives available in the state. Your state incentives will impact the pricing and may vary.

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Cost, payback period, size, efficiency and daily energy produced are shown. Though the evacuated tube system supplies greater kwh of energy, the costs are more than double and the efficiency is significantly less.

Avalance-Energy-Yurt-Concept (2) on deck reducedAvalanche Energy will also be introducing solar electric systems in the future. Their goal is to produce electricity at double the efficiency of what is currently available. Another goal is to impact space heating.

Visit the company website at: www.avalanche-energyinc.com to apply to be a part of beta testing this summer.

Ron Friedman
Ronjf1@gmail.com
Skype: Ronjf1

Guest Post: Radiant Heat for Yurts

I’m so happy to share with you today another post from Ron Friedman of Sol Solutions. If you haven’t already, check out his previous post on solar generators for yurt dwellers! He’s created another super helpful, informative post, this time on radiant heat for your Rainier Yurt.

Here’s Ron!

***

What is most valuable to yurt dwellers is space. Every square foot is precious. When you start thinking about heating systems, we all think boilers or furnaces or woodstoves that take up room and require wall or roof penetrations.

But there are now solutions that do not impact your design and comfort criteria and you will not have to cut any holes in your yurt.

The solution is in radiant heating systems that can be integrated into the floor or with strategically placed panel radiators powered by a tankless electric radiant heater. If you have gas or propane, there are alternatives to the electric systems, but they don’t have the bells and whistles or the efficiency that these systems do.

radiant-heat1Let’s start with the Supergreen electric tankless radiant heater. We need to first determine the heat loss of your yurt. (Rainier’s yurt girl can help you with this.)

Once you know the BTU requiment of your structure, you can select the appropriate Supergreen model. Model choices are the RH350 which provides 23,844 BTUs, the RH450 at 30,708 BTUs, the RH650 at 47,768 BTUs, and the largest unit available, the RH850 which offers 61,416 BTUs per hour.

For this example, we’ll look at the 450 model at 30,708 BTUs per hour. Check to make sure you have enough power coming into the yurt. The RH 450 model specifies 9kw/40 amp and 240 volt 50/60hz. Most yurts will easily be heated by this model. A few key points to remember, the Supergreen only needs to heat a little bit of water or glycol for the system. It heats the fluid quicker than any other heater due to the far infrared technology and quartz tubes hidden inside. It uses less and less energy through self modulation.

You can select an in-the-floor system, a panel radiator (panel rad) system, or a hybrid that combines both.

radiant-heat2The in-the-floor system is very slick. You could put it in a slab below your yurt, or Hydronic Alternatives provides a thermal board with pre-machined channels for the piping that gets run back and forth in loops. The design criteria tells us how many feet or loops of tubing we need. You place the thermal board on the subfloor connecting with glue and screws. Then you walk in the tubing. Next you add your finished flooring as specified by Hydronic Alternatives.

This is a closed loop system, meaning the water is heated, flows through the system, then back to the heater. Pretty simple!

But what if the water is still hot when it gets back to the heater? Remember, Supergreen modulates and uses quartz tubes and far infrared technology. That means it senses the water temperature, it knows exactly how much energy is required to get it back to the preset requirement. The tubes are zero maintenance, minerals will not effect them.

In addition, Hydronic Alternatives offers a valve that senses the temperature remaining in the tube and sends it back around without even going back into the heater if the fluid is still hot enough.

radiant-heat3

Now let’s imagine that you still need to capture more BTUs from the system. You can add panel radiators in various shapes and sizes, and these have individual controls on them. Floor mounts or wall mounts are possible. If you want to control the heat flow, all you have to do is turn the dial.

But what about that need for a little European flare – say, a hot towel warmer? You can see the little knob in the picture below towards the bottom right. If you need to adjust, just pull and turn. The rate of flow will change the BTUs delivered to that location.

radiant-heat4

You also have automatic sensors that keep the yurt comfortable. If you want to get more creative and have use of straight walls or under cabinet space, Hydronic Alternatives also provides a cove molding-like solution. It provides both radiant and convective heat, and looks just like baseboard heating systems. There are just no fins, just a feed and return line.

These systems are zero maintenance. The Supergreen RH models have a 4 year warranty. There is no mineral buildup that will destroy metal heating elements. The quartz used in Supergreen is high tech it will not degrade. And the technology allows for the quickest heating times available. With these two systems, your yurt heating system should easily be less than $2,000!

Stay warm!

Ron Friedman
Design 4 Energy
Ronjf1@gmail.com
312-857-3793

Guest Post: Solar Generators for Yurts

I’m very excited for today’s guest post, written by my friend Ron Friedman.  Ron represents Sol Solutions, a company that makes portable solar power generators.  Just to warn you, this is a long post, so grab a snack and get comfy!  This is the best post I’ve read about putting a solar generator in your Rainier Yurt.

Take it away, Ron!

***

solar-yurt-post1Differentiating solar generators for yurts versus other structures will be dependent upon your particular design. You will not put a solar system on the roof, that’s for sure. Sizing will be dependent upon how much power you need. (Adding up the wattage of all your electrical items and the hours you want them on.)

If you have appropriately facing deck space or unshaded grounds, this may represent the correct location for placement of solar panels. A portable solar generator will be a simple solution, easily portable, and plug and play. But with a solar generator you will also have a charge controller, an inverter, and the critical component, battery storage.

The critical elements of any solar generator are:

  1. Battery storage capacity
  2. Solar pv input
  3. Charge controller
  4. Inverter rating
  5. Component quality
  6. Portability
  7. Balanced system design

Battery Storage

If you are living off grid, understanding battery storage, sizing, and capacity is essential. The battery system will allow you to have lights and more during the night as well as cloudy periods, or when your demand exceeds the power output of the panels alone.

Batteries are rated in amp hours, like 12 volt 100 amp/hours. But to determine how much power you need, everything is rated in wattage draw. This requires that you calculate watt hours from the amp hours of the battery.  In our example you multiply 12 volts x 100 amp/hours resulting in 1200 watts.

solar-yurt-post2You may think that that this gives you 1200 watts of usable power, but batteries are finicky and lead acid battery manufacturers recommend using only 2/3 of the power to prevent draining the batteries decreasing the life of the system. If you drain your lead acid battery system, they will be dead or certainly suffer an early demise. In our case 2/3 x 1200 = 800 watts of functional power. So a 100 watt draw notebook computer could run for 8 hours before charging the system would be needed. In most cases you will need more power available than this. You have to add all the wattage requirements of your electrical equipment, toaster, fridge, lights, fans, TV, (everything) to size your system properly.

The solar panels capture the solar energy. They are rated in watts like 100 watt panels or 235 watt panels.

Different manufacturers provide various watt panels. In many instances you have approximately 6 hours of sunlight to capture energy if the panels are situated properly. You can leave them pointing south, but a system on wheels allows you to easily adjust the angle of the panels through the day maximizing your solar harvest.

Fully recharging the 100 amp hour battery with a 140 watt solar panel can be calculated like this. Total usable watts was 800. Divide this by 140 watts from the solar panel. 800 amp/hours divided by 140 watts, or 5.7 hours charge time. But if you are running appliances during that time, it will take additional time for charging. And batteries just sitting at less than full charge or not charging them to capacity will impact their lifespan. Hence you will design a system to be able to provide usable power and charging power simultaneously.

Charge Controller

solar-yurt-post3Between your solar panels and your batteries, you need a way to control the voltage or current going to the batteries. It protects the batteries from over charging.

Once again there are many low end controllers available. If the system is not matched well you will loose a huge amount of power or you will damage your batteries. We highly recommend MPPT controllers (Maximum Power Point Trackers). These electronic components take a high voltage DC coming off the panels and lowers the voltage so the batteries can be charged safely.

It can get pretty confusing here but a 140 watt 12 volt panel does not provide 140 watts. The MPPT controller checks the output of the panels and matches it to the battery to maintain a safe charge in amps. They are much more efficient than low end controllers.

 Inverters and Inverter Rating

The power from the solar panels is DC.  Most US standard equipment is AC. So the power must be converted. The inverter changes that DC voltage to useable 120 volt AC. There are also inverter chargers that allow you to charge your battery bank from a grid connect or fossil fueled generator. The inverter charger would take that AC power and change it to DC allowing your batteries to be charged quickly and safely.

The rating on the inverter refers to the maximum amount of power it can take from the generator. So a 1500  watt rated inverter can take 1500 watts in AC power. But pulling the maximum amount of power will deplete the 100 amp hour battery from our example in about 30 minutes. (800 useable watts divided by 1500 watts)  For solar generators the general rule to keep in mind is to allow a 1.5 to 1 ratio where your useable power in this case would be 1500 watts with an inverter rating of 1000.

Now that you have this information, watch out for:

  1. Generators with little or no battery storage.
  2. An inverter charger is an excellent choice that allows for quick charging of your batteries with grid or gas/diesel powered generators.
  3. Be sure to follow the 1.5 to 1 ratio (useable power to inverter rating).

Quality Components

Like everything else, “you get what you pay for.”  But in the case of a solar generator, if you are living off grid, reliability is critical. Or if you are using a solar generator for emergency situations it has be dependable and functioning when the need arises.

American made solar controllers and inverters tend to have 2-5 year warranties. Look for this as a standard and be cautious with low end systems.

Metal rather than plastic housings will provide much longer and durable protection for your system. Plastics break down over time with sun exposure and are just not as long lived for rugged situations like off grid scenarios, emergency situations or construction sites.

The solar panels come from China, India, the US, Canada, Germany and other countries. From a sustainable point of view, purchasing as close to local as possible makes sense. And it will contribute to help in building a sustainable solar industry here in the US or wherever you happen to be on our space ship.

Watch out for:

  1. Solar generators with un-named components
  2. Plastic casings

Portability

solar-yurt-post4Solar generators often come with some type of portability. This provides power where you need it, when you need it, and the ability to track the sun. The weight of the batteries can be very extreme even approaching 100 pounds for a single battery.

Be sure a portable system is not sacrificing storage capacity for ease of mobility. Cheap plastic wheeled units save money but do nothing for ease of moving nor long life of the system.  Look for good bicycle wheels, proper weight distribution, ease of loading into truck, or moving from the home to a workshop or outdoor construction area where power is needed.

Watch out for:

  1.  Cheap or inexpensive wheels or no wheels
  2. Unbalanced very heavily designed systems

Balanced System Designs

solar-yurt-post5Balanced system design simply means all the components of a solar generator system are quality products, fit well together, and have ratings that support the functions you are seeking. Useable storage capacity (2/3 of the rated storage ),  good solar module panel input, and the appropriate inverter rating is critical. Remember the ratio 1.5 useable watt-hours to 1 watt of inverter rating with 6 hours or less of recharging time.

1500 useable watt-hours is a good starting point for storage caacity. This would look like a 250 watt solar panel (or input) and a 1000 watt inverter.

Provided by Ron Friedman and Chaz Peling, owner Sol Solutions.

Email: Ronjf1@gmail.com

Skype: Ronjf1

Photo credits to Sol Solutions, Greendiary, Dummies.com

Please mention you read about us on the Rainier Yurt blog!

 

Glossary

AC – alternating current. Standard for households here in the US.  (The charge can go in both directions)

DC – direct current (The charge only goes in one direction)

Watts – amount of electricity used by a power consuming device

Amps – volume of electricity

Amp/hours – this is the energy rating for a battery or battery system.  You can think of this as what is the maxium amperage that can be taken from the battery until it is drained. If you draw 5 amps for a period of time the battery will last for some specific amount of time. If you draw 10 amps, it will last less time. But that will leave the battery drained (lead acid). That is not what you want to have happen. Check the manufacturers guidelines or with your battery specialist. Some manufacturers suggest only draining the battery to 60% of capacity before it would require charging.

Volts – the amount of pressure of electric power

Lithium Battery – a relatively new battery technology that allows for very dense power storage. It can store multiple times the amount of energy  of lead acid  batteries and can be discharged down to 10% of capacity with little or no harm. They are also much lighter than lead acid batteries.

Lead Acid Battery – a long time established battery technology

Solar controller – a component that manages the power from the solar panels going to the batteries.

MPPT controller – an advanced solar controller providing greater safety and charging ability

Inverter – this component takes the power from the batteries and converts it to AC power common in most households

Inverter rating – the amount of power that the component can process from the battery system

Electric Generator – a device that creates electricity. A  solar generator takes light energy and converts it to electricity. A gas, diesel or propane powered generator takes mechanical energy and converts it to electricity.

Yurt Interior Flooring

Yurts don’t maintain their structural integrity as well if placed directly on the ground but should be firmly attached to a circular platform of the same size of the yurt you are purchasing.

If you are building a residential yurt fixed with plumbing and electricity it’s best to elevate at least 18”-24’ providing a crawl space. Any type of appropriate timber decking material is a great option.

We recommend working with your local lumber yard to make sure the material fits the platform plans according to site conditions and code requirements.  Some of our customers use Structural Insulated Panels and other similar flooring and deck material.

OLYMPUS DIGITAL CAMERA

Using Structural Insulated Panels (SIPS) for your platform will help you build your platform faster, with fewer parts.

The main thing to remember is that you MUST put down your finished yurt interior flooring BEFORE you start to put up your yurt. The lattice sits on the finished floor and cannot be lifted up to install the floor.

I know of a small group of very skilled carpenters that devised a way to build up a false perimeter to support the lattice and put the finished floor in after the yurt was finished.  This is not something you should attempt at home!

flooring-install

The interior flooring of your yurt should reflect  your  own taste and style whether that is luxurious, simple  or somewhere in between.

The most common flooring is tongue and groove wood flooring, however if tile or linoleum is what you are looking for a subfloor should be laid first.

interior.sleepingyurt061

Selecting hardwood floors for your yurt can be challenging  and not having extensive knowledge of their properties to better determine the most functional, versatile and enduring wood that best matches your life style.  When selecting hardwood floors for your yurt it helps to have some knowledge of hardwoods to better determine the most versatile and enduring wood that matches your lifestyle.

yurt-interiorIf you’re looking for a wood floor that can withstand the wear of daily use while providing the flexibility and strength for years to come, a couple great options are  American cherry, red oak, and hard maple.  Other alternatives but reliable products are cork, bamboo, or rubber flooring. Cork is a natural, durable and environmentally-conscious product. It has excellent properties, is easily maintained, and is comfortable to stand on. Rubber flooring, marmoleum is a more customer earth-friendly flooring with bacterial resistant and anti-static qualities.

Carpet is another popular choice for yurt interior flooring.  Berber is still a favorite.  Ceramic tile is becoming more popular in the warmer regions and with radiant heat coils in the colder regions. I am waiting for the first customer to do a concrete platform with stained concrete flooring.

You will find helpful customer service at most local flooring centers that can answer your questions.  The “big box” stores usually have something on sale too.  Also Craigslist and Little Nickle are great sources for overstock and installation deals. Be sure to know your square footage and tell them this is a round platform – they will calculate an overage percentage because it being a round shape.

There is no right or wrong … whatever you decide to do, make it your own!

Stick to your style and budget. As always, feel free to give me a call with questions!

Happy tip-toeing, tap-dancing and “Risky-Business-sliding”!!

~Dana

~Dana

Heating Your Yurt

What if I don’t want to use only a wood stove to heat my yurt?

Two is always better than one, so I recommend that if you can, you use two sources of heat for your yurt.  There will be times that you  have a power outage and must rely on your wood stove.  Likewise there will be times when you don’t feel like going outside (in the middle of the night during a blizzard when you have the flu…) to get more firewood.

There are many different electrical heat sources that are perfect for yurts.  Space heaters have come a long way and the technology is pretty cool. First and foremost I recommend a unit that is not hot to the touch. Glowing Red elements are a thing of the past – and they typically only heat up the objects immediately in front of the unit. Lets take a look at some of the modern options:

Energy Efficient Radiant Heating Panels

Radiant-Heat-Picture-3
Rarely has there been an energy efficient system that can be turned on and off like a light bulb that produces heat like the sun in the space that we need it.

Radiant-heat-picture-1Radiant heating panels, made here in the US, are now able to provide overhead sun like warmth to the exact space where you need it.  For best impact, suspending these modules from the ceiling, is the best way to receive extreme comfort. They can reach 170 degrees and produce a cone of comfort at an 80 degree angle from the hung unit. Being radiant heaters, they do not cause drafty air movement like convection heaters.

From 400 to 600 watts, the energy efficiency of this system is significant compared to all electric heating systems as well as gas and oil. And there is no duct work and no fans. It heats people and things that than radiate the warmth back to people again.

The panels are less than 2 inches thick and come in various lengths and widths.  A typical unit is 24 ¼” x47 ¾” x 1 1/8” weighing 11 pounds. Available in either 120 volt or 240 volt drawing 3.3 and 1.7 amps respectively this unit produces up to 1365 btus.  The 120 volt model can plug right into a standard wall socket.  Thermostats, switches, and automatic motion sensors are available.  The module is framed in aluminum or steel enclosed.

Radiant-Heat-Picture-2For yurts it can be freely suspended. And for design purposes the panels are paint-able.

Sizing a radiant heating system can be a little daunting for large commercial spaces. But for small homes, cabins, and yurts, there are some helpful guidelines.  If you are well insulated, the rule of thumb is to size the panels to 10% of your ceiling square footage.  Keep the units 2’-4’feet away from exterior walls.  Also allow 4’-8’ between modules. If you know you have a cold spot, the rule of thumb says add a small unit to that area.  Or test it out.

The thermostats setbacks will cycle the units on and off as needed.

For additional information, please contact:

Ron Friedman
Rochester, NY
585-643-0907
Ronjf1@gmail.com

dyson-image1
Goodbye cold corners. Hello hot (plus cool)
Dyson Hot + Cool heats the whole room faster than any other, and cools during warmer months.

Conventional heaters have limited settings. Like a watched pot that never boils, they can’t always heat a whole room quickly. Meanwhile central heating is sometimes wasted on the whole house when you only need heat a room. Dyson Hot + Cool is engineered to heat the whole room faster than any other. Dyson Hot + Cool costs approximately 30% less to heat a whole room than conventional fan heaters.

Dyson Hot + Cool can be set between 32 and 99 degrees Fahrenheit to heat a room.  An intelligent thermostat keeps it there. Dyson Hot + Cool monitors the room temperature by measuring surrounding air.  If a drop is detected, the heater turns back on to maintain the set temperature.

James Dyson says: “fan heaters rely on inefficient motors or dust friendly grilles.  As the heat rises you’re left with a partially heated room and a worrying burning smell.  We’ve developed a heater that heats the whole room, without you having to constantly adjust the temperature.”

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It took 22 engineers – including experts in thermo dynamics and fluid mechanics – over three years to research, develop and test Dyson’s patented Air Multiplier™ technology for its application in a heater.

How it works: Using patented Air Multiplier™ technology, air is drawn in through a mixed flow impeller, a combination of the technologies used in turbochargers and jet engines. It is then accelerated through a 2.5mm aperture set within the loop amplifier.  This creates a jet of hot air which passes over an airfoil-shaped ramp channelling its direction.  Surrounding air is drawn into the airflow, amplifying it six times in a process known as inducement and entrainment.

Safety features: Dyson Hot + Cool has low surface temperatures throughout and no visible heating elements. And if tipped over, the machine has been engineered to automatically cut out.

Remote Control: Turning the Dyson Hot + Cool on and off, adjusting temperature, airflow rate and controlling oscillation can be done easily from across a room.  The remote control is curved and magnetized to store neatly on top of the machine.

Precision: Dyson Hot + Cool has temperature controls and an intelligent thermostat. Variable airflow and oscillation is controlled either by remote or on the front of the machine.

Cooling fan: Unlike conventional heaters it has a dual-mode function as a cooling fan. In keeping with Dyson’s Air Multiplier™ range it couples high airflow and velocity.

Dyson Hot + Cool is available now at on dyson.com and most major retailers at the manufacturer’s suggested retail price of $399.99.

  • Color – The Dyson Hot + Cool is available in iron/blue and white/silver
  • Easy to clean – quickly wiped clean with a cloth.
  • Weight – approximately 5.3 lbs.
  • Guarantee – Dyson Hot + Cool has been tested for the equivalent of 10 years of constant use and comes with a two year parts and labor guarantee.
  • Patents – Currently, worldwide there are over 170 patents and over 270 pending patent applications relating to 21 different technical aspects of the Dyson Air Multiplier™ fan range.
  • Environmental chamber – The temperature range in the chambers is from 32°F to 99°F, and 10% relative humidity to 80%.
  • Materials – Dyson Hot + Cool is constructed from tough Acrylontride butadiene styrene – ABS.  ABS is a tough thermoplastic used to make light, rigid and molded products.  It has good shock absorbing properties and is used to make car bumpers, crash helmets and modern golf club heads.  It’s used in Dyson vacuum cleaners and Dyson Airblade™ hand dryers, too.

About Dyson:

dyson-pg6,7

Research, design, and development are at the core of Dyson. One third of people at Dyson are engineers and scientists. Their expertise in fluid, mechanical, electrical, EMC, thermal, chemical, acoustic and software engineering allows them to design new technologies from the bladeless Air Multiplier™ fan to the Airblade™ hand dryer as well as challenge and improve existing ones. Dyson has over 1,900 patents and patent applications for over 300 different inventions (July 2011). Dyson’s RDD investment has quadrupled over the last 5 years with plans to double engineers to continue to invent new machines.

I saw this in person for the first time in Costco – they are as hot as they look! (Pardon the pun!)

For additional information, please contact:
uspr@dyson.com
312.237.3972

Another nifty little unit that I like (so much that I have two!) is the Eden Pure Heater.   This is an advanced quartz infrared portable heater that can help heat your yurt with efficiency.

edenpure-space-heater-750

Engineered and designed in the USA, the new EdenPURE GEN4 uses specially designed SYLVANIA Quartz bulbs as a heat source, along with our new “EdenFLOW™ Direct Air” technology for even more efficient and even heat distribution.

For those of you challenged with a smaller space to heat, our EdenPURE Personal Heater fits the bill comfortably, heating a more intimate space. Now 30% more efficient, the Personal Heater heats an area up to 500 square feet!

http://www.edenpure.com/

The EdenPURE Model 750 is new for 2013. Designed, engineered and manufactured in the US, this space saving heater heats up to 750 square feet. The Model 750 portable heater is equipped with patented copper heating chambers, infrared bulbs designed by SYLVANIA, antimicrobial copper and “EdenFLOW Direct Air™” Technology.

One thing I like about all of these products is that they are cool to the touch.  Little ones and pets won’t get burned if they get too close.  They can be relatively close to the walls and furniture and do not take up too much space.

Lastly, thank you to my buddy, Ron Friedman, for his input on the Radiant Heat Panels.  His technical support and education has been super helpful.

Rainier Yurts: (800) 869-7162

All my best,

~Dana

~Dana

Yurt Insulation

A Reflective Moment…

As the temperatures drop outside it is a good time to discuss insulation.

Most yurts use a LOW-E Radiant Heat Barrier type yurt insulation.  Rainier Yurts offer a single layer and a double layer of this NASA developed material. This form of insulation is new to most people – including building departments. This blog is designed to educate you on Radiant Heat Barrier Insulation and give you informative tips when conversing with your local building department.

NASA-AstronautIN THE BEGINNING:

NASA was trying to find a way to protect the astronauts during space walks from the extreme temperature shifts ranging from -273 degrees Celsius to +238 degrees Celsius.  They discovered that they would have to have a seven-foot thick protective layer on the space suit if they attempted to use conventional insulation.  Obviously, this was way out of the question.

Instead of trying to insulate the suits, they turned to reflective technology and used aluminum foil radiant barrier to solve the problem.  NASA reflected the heat of their own body back at the astronauts to keep them warm, while at the same time they used the foil to reflect the deadly direct radiation from the sun (radiant heat) out of the space suit to keep them cool.

BACK ON EARTH

Most people are familiar with traditional insulating materials such as fiberglass, cellulose, Styrofoam, and rock wool. These products use their ability to absorb or resist (slow down) convective and conductive heat transfer to insulate (R-value). A third, seldom discussed but dominant form of heat transfer exists: radiant heat transfer. A radiant barrier reflects radiant heat energy instead of trying to absorb it. This is the preferred type for yurt insulation.

IMG_0677

A few decades ago, insulation wasn’t given the importance that it is now. Power was much cheaper, so rather than worry about different types of insulation and what would best fit your home, it was much easier to simply crank the heat. However, as most homeowners today are all too aware of, this is no longer the case. Because of the increase in power costs and the emphasis on remaining environmentally aware, many more insulation types have come on the market and been refined as research and development teams uncover new technologies.  Radiant Barrier Insulation provides a completely different type of protection than traditional insulation. visit: http://www.eshield.net/

tyurts1BASICALLY PUT, IN A YURT

The foil on both sides allows it to reflect 95 – 97% of radiant heat away from a structure on the outside and back into a structure from the inside – thus working effectively in both hot and cold climates. This “green” insulation is highly effective when used with a consistent internal heat source thus by significantly reducing the amount of heat leaving or entering any structure where it is applied. When using a radiant barrier or reflective insulation, if a consistent heat source is present, 95-97% of the radiant heat will reflect back to its source when installed properly.

OLD SCHOOL

The R value of insulation is a measure of how effective it is at resisting two forms of heat transfer: conduction and convection. Conduction is when heat is transferred between solid objects, while convection is when heat is passed from one object to another through air circulation. Both of these forms of energy transfer can be straining on utility bills, which is why insulating homes with a high R value product is extremely important. However, most people don’t realize that insulation loses R-value over time, resulting in more heat lost and higher power bills. There is a third type of heat transfer, emission, which is actually far more detrimental to utility bills if homes are left unprotected.

WoodstoveNEW SCHOOL

Radiant barriers retard heat transfer by two means – by reflecting radiant energy away from its surface or by reducing the emission of radiation from its opposite side.

Emission is the direct transfer of heat from a radiant source – for example, the sun. Emission is the type of energy transfer that causes the biggest strain on utility bills.   The ability to protect homes from emission is measured in E value, which standard insulation typically has a very low rating in.

YURTS AND THE BUILDING CODE

The question of how to quantify performance of other systems such as radiant barriers has resulted in controversy and confusion in the building industry with the use of R-values or ‘equivalent R-values’ for products which have entirely different systems of inhibiting heat transfer.

According to current standards, R-values are most reliably stated for bulk insulation materials.

Reflective-Yurt-Insulation

Calculating the performance of radiant barriers is more complex. With a good radiant barrier in place, most heat flow is by convection, which depends on many factors other than the radiant barrier itself. Although radiant barriers have high reflectivity (and low emissivity) over a range of electromagnetic spectra (including visible and UV light), their thermal advantages are mainly related to their emissivity in the infra-red range. Emissivity values are the appropriate metric for radiant barriers. Their effectiveness when employed to resist heat gain in limited applications is established, even though R-value does not adequately describe them. The R-value for our single layer reflective  insulation = R9 and our double layer = R10 however when used with a decent heat source these values more than sufficient in a round structure where heat bounces off the walls and back to the center.  Sidebar: there in-lays the problem with building code officials…they just can’t think outside the box and in the round!

Radiant barrier insulation is a vital part of your yurt’s complete protection against heat transfer. Able to stop more than 95 – 97% of radiant heat, radiant barrier reflective foil insulation is an exceptionally efficient and innovative solution to thermal insulation needs. Most types of insulation protect against conduction and convection, measured by R-values. However, they fall short of reflective insulation when it comes to E-value, which measures radiant heat transfer, the main source of lost heat in homes.

Radiant barrier insulation protects your yurt from heat radiation – the leading cause of heat loss and gain in homes. Also, fiberglass can compress or become damp over time and lose much of its r-value – or level of protection against conduction and convection, while a radiant heat barrier never absorbs moisture and retains its e-value – or level of radiant heat emissivity – for life!

roof-insulation1Other Benefits:

  • Class A, Class 1 Fire Rating (passed the ASTM 286 Fire Test)
  • Non-Toxic
  • Has Sound Deadening Properties
  • Insect Resistant
  • Excellent Vapor Barrier
  • Reduces Condensation
  • A Permeability Rating of 13 – so no mildew or other moisture damage will occur
  • Contains No Allergens
  • Requires no Gloves, Masks, or Wire to hold in place

yurt-101QUESTIONS?

Q: Why don’t building codes specify E-values as well as R-values?

A: In the last century, the only cost-effective insulation for the home was mass insulation like fiberglass, cellulose and foam that reduced heat transfer by convection and conduction. The “R-value” was the measure of how good a job those insulators did. Yet R-value measures only the smallest part of residential heat transfer. E-value is the measure of emissivity, radiant heat transfer, the principle source of energy loss. New technologies make it practical to achieve extremely low emissivity in window glass and in a reflective film ideal for the attic. As these low-E technologies advance, the codes will catch up and E-value will replace R-value as the primary measure of energy efficiency.

Q: Will reflective foil barrier insulation trap mildew-causing moisture in my yurt walls and ceiling?

A: Low-E reflective barrier is designed to allow vapor to escape the yurt envelope with Perm Rating of 13 – it will not contribute to mildew growth in your home.

Q: Will reflective barrier insulation create a fire hazard in my yurt?

A: Reflective barrier insulation is fire-resistant with a Class A fire rating – Of course, like almost any material, it will melt and eventually burn if exposed to an open flame for prolonged periods of time.

BOTTOM LINE:

Building code officials are reading from a old script dating back to the 60’s and 70’s.  They need prodding to catch on to today’s technologies and environmentally designed products.  If you meet opposition to getting your yurt permitted because you cannot get a sufficient R-value for insulation;  I encourage you to challenge them as R-Values do not adequately describe Emissivity Values which is the appropriate metric for radiant barriers.

Good luck and stay warm!

~Dana

~Dana

GUEST POST: LED Lighting Options

I want to thank Ron Friedman from Rochester, NY for taking the time to share his expertise in LED lighting and how efficiently you can internally light your yurt.

Ron’s enthusiasm and knowledge has been a great help to me in learning how different bulbs affect lighting.

Feel free to contact him directly if you have any questions from his post as he is lighting the way for us! -Dana

lumensAs night falls, your campfire keeps the surrounds lit. But inside, your dwelling is dark. So how do you match the environmental integrity of your yurt and your values with your need for lighting? Incandescents burn way too much energy. HID or high intensity discharge lights can contain levels of mercury that you may want to avoid. Compact fluorescents are a good choice but even better if budgets allow are AC LEDs and DC LEDs. Solar lanterns with batteries are also available.

Our incandescent lights are measured by watts. We know a 30 watt bulb gives off a little light and a 60 watt gives off more. Watts are really a measure of energy used. Those neanderthal bulbs are energy hogs compared to alternatives. When you compare lights, a 60 watt bulb provides 800 lumens. Lumens is the key term necessary to compare the different bulbs for equal lighting capacity. You may also have to look at lighted area as well since incandescents spread light and heat in many directions wasting a great amount where LEDs can be very directed. Most stores have comparison charts so you can see how many lumens a light represents, where it is best used, how it compares to the different lighting choices, and what is the cost of ownership over the lifetime of a bulb.

(http://www.ftc.gov/bcp/edu/pubs/consumer/green/grn01.shtm)

60 watt incandescent is equal to 800 lumens

chart-1

(http://www.ehow.com/about_5421757_lifespan-light-bulbs.html)

If you are connected to the grid, you can install traditional AC lighting systems. But you are a yurt person. You want something sustainable that uses low power or solar produced power for lighting. The evolution of LED lighting has arrived just in time for your lifestyle choice. You can go with LED flood lights outside, trail markers, indoor lighting and more. Now you can have remote solar powered LED lighting with battery backup or DC low voltage led lighting with warranties up to 7 years and lights that continue to work and work and work like the Little Engine that Could. The adoption of these technologies is taking place throughout the US. Leading the way are companies like ELFI Building Systems out of Chicago. They build super insulated building envelopes but seek to provide total energy saving systems for their clients. www.elfiwallsystem.com

Renewable Rochester from Webster NY, has been satisfying remote customer lighting needs with solar powered led lighting boxes. Each box is configured with the particular led lighting requirement specified by the client as well as the amount of built in battery backup. As long as you have sunlight your battery will charge. You will have lighting when you need depending upon the quality of the solar panel used. Renewable Rochester provides this for signage so clients do not have to dig trenches and run expensive cable. It saves time, labor, and of course the energy produced is free. They have installs at campgrounds, ski facilities, farms, and more. In this sample picture, this educational model has the LED mounted right on top of the box. For units installed for clients, the LED comes with a length of cable so it can be installed up high on a post or on a building. You can use this to mark trails into your yurt site or for lighting the immediate area around the structure. The signage photo shows a fairly benign use of this system for light during the night time.

solar2

Let’s say you want quite a bit more variety and design issues solved. Here, Indianapolis based, Lumencache has a solution. Owner, Derek Cowburn, has created a DC powered low voltage led lighting system with its own battery backup with residential design flare. You do not need grid hookup as it can be powered from a solar system or other power source. It is also designed with its own inverter so the system converts to DC if required. It is wired with low cost category 5 or 6 computer wire. The voltage is so low there is no need for a licensed electrician. The wires have computer ends that just plug into the fixtures and command modules just like your computer. You can connect as many as 20 LED arrays until the maximum voltage drop is reached. You can have overhead lights and table lamps throughout. The design of your light fixtures is unlimited as lumencache can provide an adapter to make any Edison styled light a lumencache compatible fixture. Dimmable lights are standard. High power and even color changing led lights are possible with this system. If you are really living fancy in your dream yurt, motorized shades and fans can also be connected to this system.

If you are a tech geek, this system has tremendous control. You can dim the lights with 4000 steps. Going slowly, each step is not perceivable. The game is to see if you can dim the lights without your partner realizing what is happening. If you are a super geek, make believe you are Sean Connery and Catherine Zeta-Jones in Entrapment trying to avoid the motion sensors. If it is the holidays and colored lights grab you, go with red green blue lumencache luminaries. Your yurt neighbors will not have a chance in out dazzling your combinations.


Ron Friedman
Rochester, NY
585-643-0907
Ronjf1@gmail.com
www.lumencache.com

Terminology You May Come Across:

chart-2

5 year cost comparison traditional lighting vs lumencache: http://lumencache.com/portfolio/winnelson-showroom/ (click on ‘Savings’ tab)

Resources:

www.renewablerochester.com
www.lumencache.com
www.cooled.com
www.ledluminausa.com
www.lumisolair.com
www.illuminationmachines.com

A Burning Question…

stoveCan I put a wood stove in my yurt? If I only had a dollar for every time I have been asked that!  The answer is, “of course you can!” My rough estimate is that 85 % (or higher) of our yurt buyers do just that.

The only rule is that you MUST vent out through the side wall and NEVER through a vent hole in the roof.  You will void your warranty on your entire Rainier Yurt once you cut into the roof.

The next question is what size do I need? Obviously the smaller the wood stove unit, the better, as your precious space is limited. Base your size on two basic principles…How many square feet will it heat and how many BTU’s does it kick out?  There are many variables;  therefore I have done the research for you.  Let’s take a look at some of the options.

tech_inches

Price: $800-950

Thanks to my new buddy, Colin from SunTime Yurts (importer of traditional Mongolian Yurts), I was introduced to the Jotul F 602 CB.  This sharp looking unit stands 25-1/4″ tall x 11″ wide x 19-1/4″ deep and has a maximum heat output of 28,000 BTU/hr.  It can heat up to 800 square feet.  The maximum long length is up to 16″.   It is EPA approved and has a fully functional cookplate on the top.  It comes with a rear or top exit flue collar with an adapter for the stove pipe.

The only drawback I could determine from customer’s comments was that the wood-box was very small and you have to have wood cut in lengths smaller that 16″.   This baby is so popular it claims to be the best-selling woodstove ever produced and with it’s limited lifetime warranty, I can see why.

Vogelzang Standard Boxwood Stove BX26E

Price: $330-400

I also found the Vogelzang Boxwood Stove BX26E to be very efficient for heating.  Vogelzang has been making wood stoves for a long time and they’ve got safe, efficient heating with wood stoves down to a science. It has 96,000 BTU/hr and heats up to 800 square feet.  It accepts logs up to 23″ long and has a “cool touch” handle.  The length is 32″ x 26″ high x 21″ wide.

It meets the EPA regulations, however, their website states that it may NOT be installed in mobile homes, manufactured homes, trailers or tents. Hmmmm.

jotulJOTUL F 370

Price: $3800

Next we have the Jotel F 370.

This sexy little unit kicks out 35,000 BTU/hr with a heating capacity of up to 1,000 square feet (I’m thinking of our 33′ Eagle with 855 square feet or perhaps the yurts that have a connector hall to an adjacent yurt).  The base is 18 – 1/4″ wide  at the widest point. The top of the stove is 45-1/2 ” off the floor and only 17-1/2″ wide.  The exciting design allows viewing the flames from three panels of glass due to  it’s elegant triangular concept.  One downside is that its log length is only 12″.

EPA approved, this innovative design doesn’t come cheap…Price: $3800

Morso 1410 Wood Burning Stove (“Squirrel”)

Price: $999 (est.)

Meet the Morso 1410 “Squirrel” Wood Burning Stove. (So named after the distinctive and super charming squirrel branded on either side of the stove). It sits at 27-3/4″ height x 15-3/8″ wide x 17-1/4″ depth, making it a small little thing. It can burn only 12″ logs but there’s good news: you can get 8-9 hour burns out of this guy. Its efficient heat & tiny size make it perfect for small rooms, cabins, or spaces with limited heating needs — with a good insulation rating it can heat up to 1000 sq ft! Comes with a riddling grate, ash pan, and rear & bottom heat shields. Also available separately as a coal burning heater.

The “Squirrel” is great because you can choose whether to put your stove pipe through the top of the stove or out through the back (so you have the stove top to use for cooking).

EPA certified.

Click here for a great review of the “Squirrel” by a happy buyer, who claims this stove’ll burn smokeless if the coals are hot enough.

DIY: US Stove Barrel Stove Kitwoodlanddirect

Price: $69

Thinking of something a little more in your price range?  How about a DIY project? I found a Barrel Stove Kit that you make from 30 – 55 gallon steel drums (drums not included).  The cast iron barrel stove kits by United States Stove Company are an affordable  alternative for the economical heat required in small places.  The components are made from sturdy cast iron and are easily adapted to a large capacity steel drum.  Please note that this option is not available for residents in California or Washington.  Price: $69

Combine it with the Double Barrel Adaptor to increase efficiency by trapping flue gasses, which creates greater hear transfer. Adds: $39

And if you don’t want a wood-burning stove…

Dyson AM04 Fan Heater

Price: $399.99 NOW $349.99

I’m in love with this Dyson Fan Heater for someone who wants something more modern. Very sleek-looking & bladeless. Works as an air conditioner in the summer. Easy to clean. No fussing with logs if that isn’t your thing. (It comes in many versions, I’m going to talk about the AM04 Fan Heater.) It has long-range heat projection (they claim it can “heat the whole room faster than any other”), you can select your temperature by degree, & you can easily use it with a remote control from across the room (stay cozy in your bed!). It’s a super-safe option: if it gets knocked over, it shuts down automatically. Very slim footprint.

The webpage doesn’t give BTU’s or square footage, but one of the reviews says their Dyson heats their studio very evenly, and another reviewer is using theirs in an attic. Beware: reviewers also say this fan is noisy! Certainly won’t have the soothing crackle of a roaring fire. Read reviews here.

Bonuses: free shipping, 2 year warranty, and it’s on sale.

Finally…

However you decide to keep yourself warm in your Rainier yurt — please remember! —  you must vent your stove out through the SIDEWALL and not through the roof. You’ll void your Rainier warranty on your entire yurt the instant you cut into the roof.

I hope this helps you find some options. Stay cozy in those winter storms!

Dana

Someone’s in the Kitchen with Dana!

Nobody likes to cook (and eat!) more than I do!  Aren’t we all passionate about our kitchens? It is the most important part of a home. It certainly is the heartbeat of a yurt!

GREAT RM WO ARTwebI get asked daily, “How do I put in a kitchen or a bath in my yurt?”  It is really a matter of preference, just like designing a stick-frame house.  Usually our yurt customers hire a contractor to work with. It is not however necessary if you are of the Handy-Andy mold. In any case, I encourage you to follow all local codes and requirements.

The most common configuration is to have a shared wall project from the edge of the yurt to the center, causing a natural divide; with a kitchen on one side and the bathroom on the other. This is done by pulling the plumbing and electrical up through the floor and utilizing the shared wall.  Often times this creates the ideal (depending on yurt size) space for a loft over this area.

yurt-interior-kitchen1 yurt-interior-toilet

yurt-interior-kitchen3Another configuration is to have your kitchen against the outer perimeter, “in the round”.This is best accomplished by using several smaller base cabinets with the front edges touching but the back sides having pie-shaped areas of dead-space. Granite can be cut in any radius and the look is a seamless countertop!

Ikea also is a great source for modular kitchen components. That is what we have here in our Yurt Village Showroom in Seattle.  Check out their freestanding kitchens section for some great inspiration like this…

yurt-interior-cabinets1 yurt-interior-cabinets2

Be sure to also check out my custom drawn floor plans! I’d love to help design your yurt floorplan, too.  Just shoot me an e-mail or call and tell me what your yurt dream looks like.

Bon Appetit!

~Dana

More Posts About Outfitting Your Yurt