whats the biggest coal ./wood stove
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You should not need that big of a stove to heat that space. There are some monster old stoves out there but you dont want that
As a general rule, stoves were made small for up to 1000 s.f. ; Medium for approx. 1500 s.f. and larger for 2000 s.f. There were some even larger for up to 3000 s.f.
These area sizes were approximate and was calculated for an 8 foot ceiling height with normal construction back in the 1970's for Seattle Washington area. So newer construction with thicker walls and higher insulation values and more southern locations must be factored in. You don't want a stove too large thinking you can simply build a smaller fire. The firebox temperature is a factor of how clean the air and chimney (creosote) is while smoke is present. The smaller the firebox with brick lining, the higher the temperature, and cleaner it burns. The size of older stoves can be deceiving due to how much heat they put out.
Newer stoves have BTU ratings which are not real world heat output to expect when burning normally. They are comparison figures to compare other stoves to using the same fuel charge.
The height of your chimney is also a factor. The taller the chimney, the more heat it needs to make the stove work properly and avoid creosote burning wood. So a larger chimney needs a larger stove. (you already have a large flue that is not as efficient with a 6 inch coal or wood stove.) Size the stove to chimney, location, building construction, and heating area. Stoves are also purpose built for fire viewing through glass, stove top cooking area, and blowers to move heat in more difficult installations.
The design of stoves for coal is with bottom air intake directed up through coal bed, compared to wood using air from any direction. Using wood in a coal stove is not efficient since the wood gets too much air and you are burning on grates which is not as good as a brick bottom in about 1 inch of ash. There are combination stoves for both, but when designed to burn coal as well, they are not as efficient as a purpose built wood stove.
These area sizes were approximate and was calculated for an 8 foot ceiling height with normal construction back in the 1970's for Seattle Washington area. So newer construction with thicker walls and higher insulation values and more southern locations must be factored in. You don't want a stove too large thinking you can simply build a smaller fire. The firebox temperature is a factor of how clean the air and chimney (creosote) is while smoke is present. The smaller the firebox with brick lining, the higher the temperature, and cleaner it burns. The size of older stoves can be deceiving due to how much heat they put out.
Newer stoves have BTU ratings which are not real world heat output to expect when burning normally. They are comparison figures to compare other stoves to using the same fuel charge.
The height of your chimney is also a factor. The taller the chimney, the more heat it needs to make the stove work properly and avoid creosote burning wood. So a larger chimney needs a larger stove. (you already have a large flue that is not as efficient with a 6 inch coal or wood stove.) Size the stove to chimney, location, building construction, and heating area. Stoves are also purpose built for fire viewing through glass, stove top cooking area, and blowers to move heat in more difficult installations.
The design of stoves for coal is with bottom air intake directed up through coal bed, compared to wood using air from any direction. Using wood in a coal stove is not efficient since the wood gets too much air and you are burning on grates which is not as good as a brick bottom in about 1 inch of ash. There are combination stoves for both, but when designed to burn coal as well, they are not as efficient as a purpose built wood stove.
A Harman SF250 wood/coal stove is about the biggest thing I know of. They are huge and rated at 120,000 btu. They have both over and under fire air depending on if your burning wood, bituminous coal, or anthracite coal. I work with a guy that has one and he can stick 30" logs in it or 4 buckets of coal. It can be had with an air collector box that fits over the front to catch the air off the blower. It won't burn clean like an EPA stove on wood but it will blow you out if you give it air.
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