If you want to find TRUE answers to your
questions about Outdoor Wood Furnaces,
you've come to the right place.

We won't tell you that your wood will burn
for 92 hours or that you can put your
furnace 500 feet away!





Home Page for Shaver Outdoor Wood Furnace

Benefits of an outdoor wood furnace boiler

Realistic FAQ of Outdoor Wood Furnaces

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Installation of the Shaver Outdoor Wood Furnace

Purchase a Shaver Outdoor Wood Furnace

How we ship the wood furnaces and pricing

Contact Shaver Outdoor Wood Furnace







The realistic Shaver Outdoor Furnace FAQ


What is the Shaver outdoor wood furnace?

How can the Shaver heat my home and water?

What are the advantages of the Shaver Outdoor Wood Furnace?

What do the experts say?

What is the BTU rating of your furnace?

Is burning wood bad for the environment?

How long will the furnace last?

What about Stainless Steel Wood Furnaces?

How long is the warranty?

What can I expect to pay for an outdoor wood furnace?

Why is the water jacket so big? 170 gallons is a lot more than others!

How heavy is your furnace?

Won't the firebox burn out eventually?

Antifreeze as a Rust Inhibitor

Is this furnace (boiler) pressurized or non-pressurized?

Is there a lot of heat loss when the unit is outside and it's below 32° F?

Can I connect the Shaver to a forced air heating system?

I only have baseboard electric heat, how can I use the Shaver?

Can I heat my domestic water with the Shaver?

Can I connect the Shaver to a pressurized heating system?

Should I consider radiant heat?

Can the Shaver heat my pool and/or spa?

Can I heat more than one building?

Can I use an outdoor wood furnace if I live in town?

How often do I have to fill it up?

Does the furnace come fully assembled?

Can boilers explode?

Do these furnaces need to be near the house?

Do I have a choice of colors?

 

Shaver Outdoor Furnace is one of - of not THE oldest manufacturers of outdoor wood furnaces in Northern America. We have been building quality wood furnaces since 1972 - 36 years!

We have a simpler, nicer looking furnace that's made to stand the test of time. We use our own tried and true 36-year old design. We believe we have the best - and certainly the best price by far. 

We are located in north Arkansas but we ship to the extreme north in Canada, so we know all about cold temperatures. We heat our own 5000 sq. ft. home with a Shaver Outdoor Furnace.

 

What is the Shaver outdoor wood furnace?
It is a safe and efficient way to heat your home with wood or/and coal. The Shaver furnace is designed to look like an attractive outside storage building and is normally installed outside, away from the home or building being heated. 

A lot of our furnaces are installed in garages, barns or other outbuildings.

Having an outdoor furnace totally eliminates smoke,  pollution, bugs and wood debris within the house. A water jacket surrounds the huge furnace firebox and the heat is transferred from the wood fire to the water.

 

How can the Shaver heat my home and water?
The heated water is pumped to the home or building through insulated underground pipes (Pex pipe). A water-to-air heat exchanger (lake a small radiator) or a water-to-water heat exchanger conveys the heat into the home's forced-air furnace, boiler, or radiant floor heating system. 

Your thermostat controls the temperature just like in a conventional system. You get safe, even, comfortable heat.

It can also supply potable hot water to your hot water heater to provide domestic hot water. This allows for normal thermostatic control so you don't get scalding water.

 

What are the advantages of the Shaver outdoor wood furnace?
The Shaver removes fire hazards from your home or building because the fire is outside! 

An outdoor wood furnace also helps your indoor air quality and can alleviate respiratory and allergy problems caused by burning wood indoors . No more dark sooty walls and bugs either!

Thermostatic control provides your home with even, steady heat.

Current owners of the Shaver are also using up to 25 to 50 percent less wood compared to other heating alternatives. Since the Shaver can burn larger pieces of wood it will dramatically reduce time spent preparing the wood. Costs for large round timbers are also dramatically less than for smaller split wood. You can get this type of wood for $90 a cord compared to $120+.

The Shaver Furnace means easy maintenance and few parts requiring service. We don't have any circuit boards to burn out. You don't need costly electrical gadgets and features to cause problems down the road. This is a proven design of over 36 years! Keep it simple and efficient, is our motto. 

All of our parts are off-the-shelf parts that are available anywhere. There are no proprietary parts that have to be purchased from the factory!

The house will be less drafty when heating with the outside boiler, because there is no combustion taking place inside, drawing in cold outside air to replace that used in combustion.

 

What do the experts say?
According to the University of Nebraska, "Wood burning stoves may not only save people money on their heating bills this winter, but also are a clean alternative to electric or gas furnaces," Adams said.

Scott Josiah, state forester with the Nebraska Forest Service at UNL, said "There also are environmental benefits to using wood heat. Wood heat produces little pollution and is environmentally friendly, especially when wood is used in a high-efficiency wood burning stove and where firewood is a readily available resource."

 

What is the BTU rating of your furnace?

163,200 REAL BTU. Don't believe the outlandish claims of 300,000 BTU from a 65 to120 gallon furnace! They simply aren't true.

A BTU is the amount of heat needed to raise the temperature of 1 pound of water by 1 degree Fahrenheit.

That means that if the normal water temperature is 60 degrees F and it needs to be raised to 180 degrees, that it will take 163,200 BTU to do this. Remember that a pound of water is about 16 ounces. A gallon of water is approx 8 lb.

(170 gal. x 8) = 1360 lb.

Temperature change = 120 degrees

1360 x 120 = 163,200 BTU

You'd have to heat 100 gallons of water to 435 F to extract 300,000 BTU - simply not possible.

Find out how many BTUs you need HERE.

 

Is wood burning bad for the environment?
A wood heating system is the right choice for the increasing number of consumers who are concerned about our environment. Wood is a totally renewable resource, which, when burned, results in no net carbon dioxide increase. Carbon dioxide is a part of the natural plant-growth cycle and occurs naturally when trees are allowed to rot on the forest floor. 

On the other hand, fossil fuels release carbon dioxide when burned which otherwise would stay trapped in the earth. This causes a net increase in carbon dioxide, which is believed to be responsible for the heat-trapping "greenhouse effect." So when heating with wood versus fossil fuels, you actually achieve a net reduction in greenhouse gas emissions. 

In addition, harvesting firewood has a pruning effect on forests, which allows net growth to flourish. The wood you burn likely comes from your local area -- it's not imported and not subject to price increases due to events outside your control, as is the case with oil.

Many times the owners have land with fallen trees spread throughout abundantly.

 

How long will the furnace last?
We have a 20-year Limited Warranty plus a 5-year ON-SITE warranty on the furnace - NOT pro-rated. 

There is a 30-year warranty on the siding.

Electrical components such as pumps and fans are warranted for 1 year.

The life of your furnace depends upon proper maintenance. With proper maintenance your furnace will give you many years of dependable service.

We have Shaver Furnaces in service that are over 30 years old, with the old style wood siding!

 

What about Stainless Steel Wood Furnaces?
Stainless steel may last longer than mild steel in an outdoor furnace, but not all stainless is a “forever” product. There are many grades and some of them are subject to rusting and corrosion. Automobile exhaust systems are made from one of the lower grades; they resist high temperatures but totally corrode.

Most outdoor furnace manufacturers went to stainless steel to get in on the stainless quality image, but since it’s expensive many of them went to a low-cost, cheap-grade stainless - which is still subject to rust and corrosion! During the manufacturing and welding process for stainless steel, if the proper quantity and blend of corrosion-resistant and stabilizing elements are used, then it does indeed become a “forever” product. These elements optimize weldability without the need for post-weld annealing to restore ductility, formability, toughness and corrosion resistance.

If you do purchase one of the lower grade stainless steel furnaces, be sure that the same model made in steel has a proven track record of corrosion resistance. The furnace design is every bit as important as the material that it’s made from.

 

 

How long is the warranty?
Shaver Outdoor Furnaces have a limited 20-year warranty! The Shaver furnace also has a 5-year ON-SITE warranty,  including parts and labor on the entire structure, in the very rare case of a leak. 

There is a 30-year warranty on the siding.

Electrical components such as pumps and fans are warranted for 1 year.

 

 

What can I expect to pay for an outdoor wood furnace?
Total prices will vary depending on the shipping location but our prices start at $4,277, picked up at our facility..

 

Why is the water jacket so big? 170 gallons is a lot more than others!
Many stoves do not have enough water capacity and tend to cycle too often. You load the stove with wood and fire it. With a small water capacity, the water reaches set point temperature and the stove shuts down. The Hardy just has 100 gallons in their base model and 130 in the next model up! You still have a good load of wood in the firebox that sits there and smolders.

The Shaver Outdoor Furnace has a large water tank capacity, so you can burn the total load of wood with good draft, burn and efficiency. 

More water also means more capacity (available BTUs) but at the same time the water doesn't have to be heated as much either.

How heavy is your furnace?
Our furnaces weigh in at a hefty 1600 lb dry, which is a testimony as to how much steel is really in the furnace. The Hardy H2 furnace only weighs 650 lb. The Hardy H4 is only 850. Hmmm... What does that tell you? 

Many of the competition's fireboxes are only as thick as a trailer fender!!

Won't the firebox burn out eventually?
The Shaver Outdoor Furnaces are made with heavy gauge steel and will never rust out, to be sure. Can you imagine a piece of metal 4/10" (.400") thick ever rusting though? (many boilers out there are only 1/5" or .200" thick). That is why there are many Shaver  Furnaces with over 30 years in service, still going strong.

What about stress cracks? The extreme thickness of the metal we use helps avoid stress cracks as well. We simply don't have the problems other folks have.

 

Antifreeze as a Rust Inhibitor

Unscrupulous dealers will tell you that the sole purpose of antifreeze is to keep the furnace from freezing up. Not true; the main reason is rust prevention. Rust is the enemy in the outdoor furnace business.

Antifreeze is generally not needed as it takes a very long time to freeze 170 gallons of water and there is plenty of expansion room in the top of the tank anyway.

There are several other alternatives to prevent freezing and at a far less cost. An in-line electric heater can be installed on the return line and set at just above the freezing mark as an extra safeguard.

Even better, you can also simply leave the pump running if you go on vacation and it will extract heat from the furnace keeping the water warm. The pump only uses  110W, about the same as a light bulb.

Antifreeze is an excellent rust inhibitor but it does have a disadvantage. It is designed to keep engines cooler. When used in an outdoor furnace, it has been stated that it takes 18 percent more firewood to heat the water/antifreeze mixture than to heat plain water. 

Do not use regular automobile antifreeze. The best glycol additive is Dowfrost from the Dow Chemical company. It is environmentally friendly, allows higher operating temperatures, has excellent anti-corrosion features plus it has a longer life expectancy than other glycols.

We have also heard that Beet Juice is an excellent and inexpensive antifreeze! Beet Juice has a neutral Ph just like water.

 

 

Is this furnace (boiler) pressurized or non-pressurized?
The Shaver Outdoor Furnaces are non-pressurized. They are atmospheric vented, which means they are totally safe and never build up pressure.

 

Is there a lot of heat loss when the unit is outside and it's below 32° F?
The units are very well insulated to avoid heat loss. In fact icicles form on the outside of the siding in the winter due to the R50 insulation in the roof. That means that the heat is being kept inside!

 

Can I connect the Shaver to a forced air heating system?
Yes, more than 80% of all of our installations are connected to existing forced air heating systems. 

A heat exchanger (much like a heater core in a car) is mounted in the ductwork. When the fan blows air through the heat exchanger, you get heat!

 

I only have baseboard electric heat, how can I use the Shaver?
Many people with electric baseboard heat elect to install radiant floor heat between the floor joists or Hydronic baseboard heaters on the wall. 

 

Can I heat my domestic water with the Shaver?
Yes, our system circulates potable hot water in a closed system, between the outside furnace and the hot water heater. This keeps the hot water refreshed, hot and ready to go at all times. No heat exchanger is needed on your hot water heater! 

We show you how to plumb it right into your hot water heater - saving $200 for a side-arm exchanger! Most people find they save between $30 and $60 a month heating their water with an outdoor wood furnace.

 

Can I connect the Shaver to a pressurized heating system?
Yes, in one of two ways. It's best to use a water-to-water heat exchanger so that the heat can be transferred from the water in one system other.

You can connect it directly to the existing system by depressurizing it but we don't advise it.

 

Should I consider radiant heat?
Radiant heat installed under new or existing floors can be a great way to heat your home because there are no drafts and the floors (and your feet) are toasty warm! Radiant floor heat is the most efficient way to transfer heat, however, it is important that you design the system correctly. This is also expensive but pays for itself with warm tootsies!

Many people with electric baseboard heaters opt for this method.

 

Can the Shaver heat my pool and/or spa?
Yes, many Shaver Outdoor Furnace customers heat their pool and/or spa. You can put wood in the furnace every 3 days or more in the summer. I guess this is where many manufacturers get the outlandish claims of 72 - 96 hours burn time!

Remember that smoke output will be greater in the summer due to the smoldering fire and plan accordingly.

 

Can I heat more than one building?
One of the many advantages of the Shaver Outdoor Furnace is the ability to heat multiple buildings from one location. We have heated up to 6 buildings and a hotel with the Shaver Furnace. Simply add a pump and Pex line to your location and you will have an additional heated area or building.

 

Can I use an outdoor wood furnace if I live in town?
Wood may not be the best fuel choice in densely populated urban areas where automobile exhaust and other pollution already puts excessive strains on air quality. Smoke can also overwhelm your neighbors if the wind blows the wrong way.

However, in suburban, small town, and rural areas, wood makes good sense. If you choose to install your Shaver furnace in a densely populated area the stack height should exceed the rooflines of existing homes if within 100 feet..

 

How often do I have to fill it up?
We put wood in our furnace at 8 AM and 8 PM. So 2 times a day. Don't believe exaggerated claims of 72-96 hours!  This just isn't possible - except in the summer, heating only water and a pool, hot tub or spa.

The size of your house, outdoor temperatures and the size of the house will determine how much wood you use and how often you fill the furnace along with whether you heat hot water.

 

Does the furnace come fully assembled?
Yes, it is delivered to you ready to install AND includes a circulation pump and a built-in heat exchanger for your domestic hot water..

 

Can boilers explode?
The Shaver Outdoor Furnace is a non-pressurized systems which totally eliminates the possibility of an explosion.

 

Do these furnaces need to be near the house?
We recommend that the Shaver Outdoor Furnace be within 100-150 feet of the house. Claims in product brochures and manufacturer's websites that these units can be 500 ft from the house are true but only if an upgraded pump is used AND the Pex pipe is well-insulated.. 

The furnace can be 10 feet from the house according to most insurance companies but the chimney must go to the ridgeline of the home.

 

Do I have a choice of colors?
The Shaver Furnace is available in 20 different colors, to be sure it will compliment the exterior of your home or match other buildings.. Currently available colors are shown below:

20 colors for your siding!

A total of over 8000 color combinations - sides, corners and roof

 

Plus Galvazume which lasts 6 times longer than Galvanized metal!

 

Also introducing RealTree™ Camouflage!

 


SHAVER OUTDOOR WOOD FURNACE

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Modified 7-13-2007
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*Our standard furnace will heat in excess of 4,000 sq feet
including all buildings, well insulated - plus hot water.

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