Best Outdoor Wood Furnace

20-YEAR On-Site Warranty!


Shaver Wood Furnace Heater


Benefits of an outdoor wood furnace boiler

5 Sizes of outdoor furnaces

Realistic FAQ of Outdoor Wood Furnaces

Pictures of Outdoor Wood Furnaces

Wood Furnace Articles

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










We are here to help you any way that we can;
even if you just need advice!

Write to me at:

                or call Randy (608) 519-4664


Sale extended until April 30 at 6pm CT to give customers the opportunity to take advantage of this incredible sale!  Also before the Thermowind price increase of $250 which gives you a savings of $500 on the Thermowind units!

Save $250

Top loading wood burning
Hydronic stove

top loading wood burning boiler


Chest design; Log Burner

Load with your backhoe, front-end loader
or other machinery!

  Pro Series 165 165 Top Loader (chest furnace)
Fire Box 36“
(ID Round, Horizontal)
x 34” long
36” (ID Round, Vertical) X 36” Deep
Water Capacity 170 gall 235 gall   
110 gall bottom water jacket, 125 top water jacket
BTU 165,000 229,360
Price $5,377 $8,477

  Pro Series 250 250 Top Loader (chest furnace)
Fire Box 36“
(ID Round, Horizontal)
x 50” long
48” (ID Round, Vertical) X 36” Deep
Water Capacity 230 gall 337 gall   
141 gall bottom water jacket, 196 top water jacket
BTU 240,000 328,912
Price $6,277 $9,467

  Pro Series 290 290 Top Loader (chest furnace) 290L Top Loader (Chest Furnace)
Fire Box 36“
(ID Round, Horizontal)
x 58” long
60” (ID Round, Vertical) X 36” Deep 5’ (ID Round, Vertical) X 6’Deep  
Water Capacity 260 gall 454 gall  
172 gall bottom water jacket, 282 top water jacket
649 gall   367 gall bottom water jacket, 282 top water jacket   
BTU 280,000 443,104 633,424
Price $6,627 $9,875 $13,875

  Pro Series 340 340 Top Loader (chest furnace) 340L  Top Loader (Chest Furnace)
Fire Box 36“
(ID Round, Horizontal)
x 68” long
72” (ID Round, Vertical) X 36” Deep 6’ (ID Round, Vertical) X 6’Deep
Water Capacity 300 gall 588 gall  
204 gall bottom water jacket, 384 top water jacket
816 gall  
432 gall bottom water jacket, 384 top water jacket
BTU 326,000 573,888 796,416
Price $7,277 $10,398 $14,898

  450 Top Loader (Square)
Fire Box  6' Long X 3' Wide X 3’ Deep
Water Capacity 427 gall  200 gall bottom water jacket, 227 top water jacket
BTU 416,752
Price $10,427

  580 Top Loader
(chest furnace)
580L  Top Loader
(Chest Furnace)
Fire Box 7’ (ID Round, Vertical) X 3’ Deep 7’ (ID Round, Vertical) X 6’ Deep
Water Capacity 736 gall   235 gall bottom water jacket, 501 top water jacket 1001 gall  500 gall bottom water jacket, 501 top water jacket
BTU 718,336 976,976 
Price $12,989 $17,489




Check out our ThermoWind video below:



 ThermoWind 1000

Outside Waterless Furnace
is rated to heat
up to 3500 sq. ft.


ThermoWind 2000

Outdoor Waterless Stove
is rated to heat
up to 5500 sq. ft.

for only


ThermoWind 3000

Outside Waterless Wood Burning Furnave
is rated to heat
up to 6875 sq. ft.

for only


 ThermoWind 4000

Best Outside Wood Waterless Furnace
is rated to heat
up to 8500 sq. ft.
or more if shop, garage, etc.

Two firebox doors (one on each end),
two full size furnace fans and 4 ducts
for VERY large buildings

for only

SAME 20-Year On-Site Warranty!


The Most Efficient Outdoor Wood Burning Forced-Air Furnace there is!

Ή Heating a well-insulated home in a climate
as cold as PA, using a good hardwood like Oak
and loading it twice a day


All of the rest of the site - over 100 pages - are about the traditional water furnace.

All other links, other than the four above, are for the water furnaces, that we've built for 41 years.



STOP! You've found the BEST! 
NO ONE ELSE has a firebox that is .469" (1/2") thick!
Most are only .125" - .1875"

We have an optional firebox
that is almost 1/2" thick*  -

for only $175 ! (water furnaces only)

Most are only .125'' - .1875"

Our closest competitor
is only 1/4" thick. 
We're 87% thicker!

To stop the scrolling text, simply
move your cursor over the box below!

Discover more reasons WHY we have the

Outside Wood Burning Stove




We Build the
Finest Wood Burning
Furnace Made!

...for 41 Years!



Outside Wood Burning Furnace

Our outdoor wood furnaces come in
20 exciting colors plus Galvalume!
...and over 8000 exciting combinations!

  NEW!!  Printable copy of most of this information!

* cylinder/tube thickness



Go "Like" our new Facebook page for the latest information about our furnaces:

Please note that all prices listed are for the unit models only and do not include pex, parts or shipping costs!

Check out our boiler video:


6 DAYS -
We are usually available from
8 AM - 8 PM CT Mon to Sat

Wed, Friday and Saturday;
8 AM - 5 PM CT


15% discount for Pex Pipe, from Abbott Boiler Supply, exclusively for Shaver Furnace Customers!
Click Here!     828-687-4074


in the WORLD with
when you use:

5-year Rust Blocker
Water Treatment!


Outdoor Wood Furnace Contest


View ALL of the Videos and

See more Shaver videos at YouTube!

Shaver Furnace Reviews 
- Customer Testimonials


Shaver Wood Burning Furnace Reviews

View the Customer Review Videos Here!

Click to verify BBB accreditation and to see a BBB report.

Click to verify BBB accreditation
and to see a BBB report

The Shaver Outdoor Wood Furnace...

provides hot water to work in conjunction with your existing forced air, boiler or radiant system as well as providing domestic hot water plus heating for spas, hot tubs and pools PLUS driveways and sidewalks! Our
systems tie in easily to virtually any system; floor heating, forced air, boilers, water radiators and more.

Even if you don't have an existing system, we can make it work for you!

An outdoor wood furnace is a wood burning  furnace that sits outdoors - keeping the mess, smoke and bugs outside. The furnace, looks much like a small utility building. It is a wood fired, water-jacketed stove.

The hot water is circulated through underground Pex pipes to the inside of the house, where they are hooked to a heat exchanger in the majority of cases. 

It is also directly plumbed to the hot water heater, eliminating the need for a $200 side-arm heat exchanger for that purpose.

It can also be tied in with an existing Hydronic floor heating system or boiler.

Heating with an outdoor wood furnace has never been easier. Instead of moving the wood and corresponding mess and bugs indoors, the wood burning furnace is outdoors - next to the wood. 

Load it once at night and once in the morning and you're done! Don't believe the stories about wood burning 96 hours! See the article here.

Indoor air pollution is cut to zero by moving the fire and smoke outside, which is vital for people with Asthma, kids and the elderly. However everyone can benefit from not breathing all that smoke and particulates! Your walls and furniture will stay smoke-free and cleaner too.

Simple, clean and efficient, one furnace can heat your house and garage and a shop, spa, swimming pool, hot tub, greenhouse, etc*

NOW comes with an improved rear door latch and an adjustable front door latch plus a fitting standard, for a dry-well (for a probe) or thermometer and a neater, better seal around the chimney PLUS the automatic damper on our fan and a chimney cap!

Building a Superior Outside Wood Burning Furnace Since 1972

20-Year On-Site Warranty!
5-Year On-Site 100% PAID!
Parts AND Labor!

Read about our Great On-Site Warranty Here!

It's the BEST in the industry!

Most warranties only cover parts and also require that you ship the furnace back to them at your expense! (It's easy to ship you
a piece of metal and tell you to weld it in or make you pay for shipping it back).

Our warranty covers
Parts AND Labor for

(except on the pump, fan and thermostat)


Find out why we DON'T use Stainless Steel and why it's a marketing gimmick designed to separate you from your money!

WHY use Boiler Plate

Shaver wood furnace Logo

Coal Burning Furnaces
Check them out HERE.

These are specially designed with shaker grates to make coal burning easy and economical. 


FIVE WOOD BURNING FURNACE SIZES for up to 8,000 square feet or more!

FOUR COAL FURNACES for up to 8,000 square feet!

FOUR Forced-Air Furnace Prices for up to 8,500 sq. ft. or more if shop, garage, etc.

Buy one NOW from $5177 (140 model) including a pump and
built-in heat exchanger for your domestic hot water -
Wood Burning Furnace


All IN, NH, NY, MD, ME, PA, OR, VT, WA wood burning furnaces MUST be EPA approved now.

HOWEVER, Coal Furnaces may be able to be sold and installed in IN, NH, NY ME, PA and  VT. Purchasing a coal furnace does not have to be EPA approved in many states.

Vermont regulation exempts any wood-fuel burning equipment with a rated output of less than 40 horsepower (1 boiler hp = 34,500 Btu/hr) = 138,000 Btu. Our 165 falls into that category.

Thermowind Furnaces are permitted in Indiana and may be permitted in other states, that have
laws concerning "boilers".

Our 340 model puts out in excess of 300,000 Btu, which in some states is also excluded and therefore legal!



We have a new
EPA approved stove NOW, that does NOT require the wood to be less than 20% moisture content (the problem with all other EPA certified furnaces!









IMPORTANT: Please Read!

First and foremost the firebox thickness is the most important factor. We have the thickest firebox available in the industry at just shy of 1/2" -  compared to 1/4" from our nearest competitor. That's 100% thicker and that's important because the firebox is always the first thing to fail. Most furnaces are only .125 to .1875" thick, with only 2 others that are .250" thick.

We have a 20 year parts AND labor ON-SITE warranty. Most others just cover parts or their warranty is much shorter - read the fine print!!

There is a forced-air blower in back that feeds air into the firebox, below the grate, to feed oxygen to the fire. Feeding the fire from the bottom (just like a blacksmith would) is the best way to get complete combustion from the wood. This is infinitely better than a fan on the front door blowing air into the side of the fire - or a manual draft. The fan is thermostatically controlled to keep the water at a set temperature and is adjustable.

The grates are made out of 3/4 inch bar stock. We have NEVER had one burn through!

The ash "pan" (non-removable) is approx. 16" wide x 34" long and is 8" high (on the 165 model and up to 68" long on the 340 and TW4000). Many furnaces don't even have one, requiring you to let the fire die down in order to clean it.

We also have a 50 foot POTABLE water coil (for your water heater) made out of 50 feet of coiled 5/8" OD copper tubing!

With our built-in heat exchanger don't need a separate heat exchanger for the hot water heater, often called a side-arm exchanger. We have 3 water outputs standard. One is potable water using a sealed copper coil and lines to your water heater. The other outputs give you the whole 170 - 300 gallon tank of water that is circulated with a pump to the inside heat exchanger.

We have a 170-300 gallon water tank! Many manufacturers only use 90-125 gallon tanks! The size is critical when heating a larger home. DON'T BELIEVE IT when they say they can heat 4,000 sq. ft. and have 300,000 BTU from 100 gallons. That's impossible without heating the water to over 300 degrees! Science is science!

The firebox is round and infinitely stronger than any square firebox will ever be! On the 165 model, it is 36" wide x 26" high (due to the grate and ash pan in the bottom) x 34" deep. The 340 model is 68" deep! It is made from almost 4/10th of an inch of solid steel. We've never had one rust through or crack!

It is totally surrounded with 170 -300 gallons of water, so that it absorbs the maximum amount of heat possible! The water jacket surrounding the firebox is rectangular and is made from 1/8 inch thick metal - the standard in the industry for water tanks - as opposed to auto body thickness sheet metal on others. We are two times thicker; 11 gauge vs. 16 gauge.

The chimney is made out of 5 inch schedule 40 pipe (1/4" thick) and is surrounded by water as well. It tops out at about 90" above ground. You can EASILY add extensions with standard 6" stovepipe.

The chimney is low in the firebox and exits about 1 foot from the bottom shelf, so that the smoke - or more importantly, the heat - is trapped so that it doesn't quickly escape out the flue. That would be a big loss of efficiency. This is also a better idea since you don't have baffles creating a lot of smoke and getting a creosote buildup on them that's hard to clean.

This also creates a 2nd burn chamber, to more completely burn the gases and wood! When wood starts to burn it's the escaping gas that burns first, then the wood! This is a type of gasification furnace but we do it a whole lot simpler and without any computer parts or circuit boards.

The water surrounds the ash pan as well. As anyone with a wood-stove or furnace knows, ashes put out a lot of heat!

There is a full-size rear door approx 40 x 48 inches. This makes it VERY easy to make connections and to service it. There is no need to pull the whole shell off as with other furnaces!

We have an extra large, waist-high loading door - 18" x 18" suitable for putting BIG pieces of wood in! A 30" piece, only 15" in diameter will weigh 115 lb!

The door material is made with a 1/2 inch frame and a 1/4 inch outside steel plate plus a 1/4 inch thick inside steel plate separated by the air gap between the steel plates. This door will never burn through! The insulating ability is the air gap plus the reflective factor of the inside plate. The inside plate only 4 bolts attach it to the door so there is very little heat transfer. There is also insulation between the plates now!

These furnaces now come with an automatic double flood light on the front for safety and ease of loading the wood. Not only that, it's a MOTION LIGHT! No switches. No forgetting to turn it off. If it's dark outside and you go near the furnace, it turns on!

There are legs on the bottom with a skirt surrounding the bottom to ground level to keep it warm and dry.

The exterior is made of Heavy Duty Siding - 29 gauge with 10 coatings and it has a Lifetime film integrity warranty and 30 years against fade and chalk

We can build just about anything. Billy did one recently with FIVE outlets!

Remember, the 20 year parts AND labor ON-SITE warranty - even in Canada - is probably the best feature because at least 50% of the manufacturers out there require that you ship the furnace back to the factory to get it repaired. Then they have to ship it back and while the repair may be free, they charge you for the shipping both ways AND you have to disconnect the furnace, reinstall it and be without it for 2-4 weeks.

MORE Best Outdoor Wood Furnace HERE! with pictures

have stood the test of time. 

Many SHAVER Furnaces are still in use today after over 25 years
of putting out the heat efficiently and safely. 

SHAVER Outdoor Wood Furnaces are WELL BUILT to save you money
by producing heat effectively with a minimum of
waste, expense, or unnecessary effort.


Stop Paying those Big Oil & Gas Bills!
Keep the smoke, ashes and dirt outside!
Enjoy Nice Warm Wood Burning for a change.
Choose a Shaver Outdoor Wood Furnace Today!
Building Quality Wood Furnaces since 1972

OPEN 6 DAYS to serve you better -  Friendly helpful service;

We are usually available from
8 AM - 8 PM CT Mon to Sat

Wed, Friday and Saturday;
8 AM - 5 PM CT



Please consult the dealer list before ordering from the factory.

Canadian Website for Shaver Wood Burning Furnace

Please fill out our simple application


Finance Your Furnace NOW!

For As little as $91 a month with only $677 down! (Financing $4000)**

OR order your furnace with a deposit of $1000-$1500
(depending on model) and pay the balance before it is delivered!



Buying stocks and profiting from them couldn't be simpler than using Cool Trader Pro
the totally automated trader!

BTU Load Calculator

WOOD vs. Gas/Oil/Electric Cost Comparison Chart 

Wood Species BTU Chart

Hydronic Wood Burning Furnace 

NEW!  View  and Print our NEW Color  Brochure

NEW!!  Printable copy of most of this information!

Our Wood Furnace Website for our friends in Canada

Informative Factual Review of all Wood Burning Furnaces - Canadian Website

Our other favorite websites

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Shaver Outdoor Wood Furnace
Factory: 328 Hwy 62 West
Salem, Arkansas  72576

(608) 519-4664


We are usually available from
8 AM - 8 PM CT Mon to Sat

Wed, Friday and Saturday;
8 AM - 5 PM CT


Please consult the dealer list before ordering from the factory.


Modified 4-12-14

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*Our standard furnace, the Shaver Pro Series 165 will heat over 4,000 sq feet
including all buildings, well insulated - plus hot water, burning a good hardwood like oak.
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