My furnace is in a class of furnace known as Masonry Heaters. Masonry Heaters are heavy, thermal storage, radiant heaters weighing from 1500 lbs to 10000 lbs. They operate on a 20 to 50 lb. fast burning fire lasting 1 1/2 to 3 hrs,storing then radiating that heat over the next 10+ hrs. or more depending on your heating requirements with very frugal wood use. Mason built MH cost any where from $15K to $40K and are typically used in a open floor plan. My furnace will retail in $4K to $6K ? range and weighs 3000 lbs. It can hold a lot more heat than a equal size MH due to the unique stress free design. Mason built heaters are limited to a 170 to 200 degree surface temp due to thermal stress factors. I have run mine up to 275 with no problem. Along with the radiant heat I've incorporated an exhaust stack heat-exchanger that delivers 150 to 200 degree forced hot air heat to remote areas during the firing cycle and until the fire dies out .You may wonder how do you move a 1 1/2 ton furnace? Offered as a kit It's a very simple yet extremely strong modular design that bolts together with the heaviest piece weighing 100 lbs. The furnace framework and common fire brick can be moved into place and assembled in 6 to 8 hours ready to fire up. The advanced, 4" thick fire brick lined combustion chamber, enables the wood fire to burn in a naturally aspirated manner ( not forced air fed) and develop into a ULTRA CLEAN ,full gasification burn state with 98% combustion efficiency with no creosote formation . Aside from these unique features I'm using this furnace in an unusual manner. I'm using my furnace as the heat source for my modified forced hot air heating system in the basement. I'm able to maintain any temperature I desire in my 3000 sq. foot 9 room house relatively evenly with only a 2 to 4 degree fluctuation between fires. The main activity area run a little warmer being supplied by the exhaust heat-exchanger and the 1400 sq. foot basement sees about a 5 degree rise to 60. Independent laboratory testing in North America and Europe shows an overall efficiency approaching 75% for this class heater. Once you experience a home heated by a masonry heater you will be a believer as I did 20 years ago.
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