Outdoor Coal-Wood Burning Furnace-Stove-Boiler


Outdoor Coal Burning Furnace

We'll be happy to answer any
questions you may have!



Benefits of an outdoor wood furnace boiler

Realistic FAQ of Outdoor Wood Furnaces

Pictures of Outdoor Wood Furnaces

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
























Shaver Outdoor Wood Burning Furnace



Burning Coal

Many manufacturers changed to natural gas in making their products but are now switching back to coal because it is less expensive.

Coal Burning Furnace

Coal burns super hot and needs a very thick
firebox - like ours- to withstand the intense heat.


The Shaver Coal Burning Furnace is specifically designed to
burn coal and it comes with a shaker grate to help get rid of clinkers.

However, COAL AND WOOD can be burned separately or simultaneously.

Coal Shaker Grate

Coal Shaker in Furnace

Shaker Grate Removed

Click on the pictures to see a LARGER image.


A video of how the shaker grates work.

Our shaker grate is the FIRST adjustable shaker grate in the industry!
You can adjust the spacing from " to 1" to accommodate different types of coal.


We now carry 4 sizes of COAL burning furnaces. These models are specifically designed to burn coal. With the fan feeding oxygen in from the bottom, the coal burns easily. Simply but a wood furnace model (above) and add an optional shaker grate to help get rid of the clinkers.

Shaver Coal Series 165  $5577  175,000 BTU and a 170 gallon water tank.  3,000 - 3,500 sq ft.*

Shaver Coal Series 250  $6527  254,000 BTU and a 230 gallon water tank.  4,500 - 5,000 sq ft.*4,500 - 5,000 sq ft.*

Shaver Coal Series 290  $6877  330,000 BTU and a 260 gallon water tank.  5,200 - 6,000  sq ft.*5,200 - 6,000  sq ft.*

Shaver Coal Series 340  $7577  346,000 BTU and a 300 gallon water tank.  6,000 - 7,000 sq ft.* 6,000 - 7,000 sq ft.*

ADD $175 for the 1/2" thick firebox.


Solenoid Activated Damper with the bigger fan/blower - Now INCLUDED
Digital thermostat Ranco with Dry Well $110
Thermometer $20
Delete the siding and insulation -$300
Delete the built-in hot water coil -$100
Chimney Cap - Now INCLUDED

Grades of Coal

Anthracite this type of coal has the highest percentage of fixed carbon and a lower percentage of volatile material than all other coals, making it harder to ignite. However, when it is ignited, it burns relatively smokeless. 

The most well-known anthracite mines in the United States are in western Pennsylvania. 
Anthracite Coal
Bituminous Bituminous coal is the most abundant and most widely used coal. This is the type of coal found in the Appalachian region. It has a higher heating potential and is used for making coke. It has a higher percentage of fixed carbon, greater heat value and better weathering characteristics than lignite and sub-lignite coals.

Most of the non-metallurgical grades of bituminous coal are burned in boilers or furnaces to obtain thermal energy for generating electricity. Because bituminous coal is softer than anthracite, it is often referred to as soft coal.  It does emit smoke as it burns, unlike anthracite.

However, there is a region in Southern West Virginia where the bituminous coal burns relatively smokeless. The Smokeless Coal Fields of Southern West Virginia are unique in the world.
Bituminous Coal
Sub-bituminous A lesser grade of coal, it has more moisture and less carbon than bituminous.

Nut Coal - Very small coal - about 1/4" in size. See important note below.

Click on pictures to the right for a bigger image.  >>>


Nut coal Rice coal
Nut Coal                 Rice Coal

Pea Stoker coal  
Pea or stoker coal

You must notify us, if you plan on using "NUT COAL", rice coal or pea coal, as they are all very small.

You cannot burn "run of the mine" coal, without voiding the warranty
because it burns way too hot.

In the United States, the coal power plants
generate 50% of the electricity produced.

Buy a Coal Burning Furnace TODAY!


  • Lower your utility bills! Coal is easy to load - by the shovel load, as opposed to wood. You can eliminate your gas, electric or oil bill simply by using a Shaver Outdoor Coal Furnace to heat your home and hot water. Coal is very plentiful in many Eastern states.
  • Heating with coal - outside of the house - is CLEANER! 
    No more smoke, ashes, bark, bugs, log piles and trash in the house. Many types of coal burn virtually smokeless.
  • Heat your hot water with your Shaver Furnace and save $30-60 a month on this feature alone! It takes care of all your hot water needs and the elements in your hot water heater may never come on again! 
  • Safety. Our furnace is made to be situated away from the house, in the yard. The usual distance is about 50 to100 feet. Outdoor coal furnaces remove the danger of wood stove fires in the house. Any fire department that compares the safety of indoor units versus outdoor furnaces will clearly state that outdoor furnaces are the winners. This safety feature usually lowers your insurance rates. 

    With ZERO wires, electronics, fans and controls on the outside of our furnaces, our unit is simpler and safer.
  • One furnace can heat multiple buildings; so there is no need to purchase a heat source for each. Simply run an extra run of PEX pipe to the area you want to heat - even garages, shops and greenhouses without an existing furnace! Some people even heat their driveways!
  • Residential and commercial buildings, factories, restaurants and garages can all be heated easily with our coal furnace.
    Simple, clean and efficient, one unit can heat your house or/and shop, garage, swimming pool, hot tub, greenhouse or factory.*


Outdoor Coal & Wood Burning Furnace - Stove - Boiler

Shaker Grate Video





Get a Superior Wood Furnace!

Since 1972 - 39 Years Strong!





BTU Load Calculator



Modified 8-2-2012

Copyright 1995-2012

*Our standard furnace (the 165) easily will heat over 4,000 sq feet
including all buildings, well insulated - plus hot water.

In Southern climates like NC, SC, GA, TN it can easily heat 5,000 sq. ft
and still only have to load it once in the morning and once in the evening, at the most.