Massive heaters have sufficient mass to heat all of or a substantial part of your house from one location. We offer a variety of standard models in different sizes to suit your specific circumstances.
Models vary substantially in weight from 2,800 lbs to 6,700 lbs. It is very important to choose the correct heater mass for your application in order to experience the full benefits of the system.
All heaters can be produced in dark or light grey soapstone or a mixture of the two tones. Our standard models can be configured with clean ovens, tunnel doors, heated benches, and a number of other amenities, as seen here. Custom heaters can have custom finishes, colors and textures of the facing stones visible on the outside. Contact us for help in the selection of the right model for you.
According to Wikipedia, soapstone is the preferred material for woodburning masonry heaters because it can absorb, store and evenly radiate heat due to its high density and magnesite (MgCO3) content.
Geology.com contributor Hobart King writes that Scandinavians began using soapstone during the Stone Age and it helped them enter the Bronze Age when they discovered that it could be easily carved into molds for casting metal objects such as knife blades and spearheads. They were among the first to discover the ability of soapstone to absorb heat and radiate it slowly. That discovery inspired them to make soapstone cooking pots, bowls, cooking slabs and hearth liners. Soapstone does not burn or melt at wood burning temperatures and it has the ability to absorb heat, hold heat and radiate heat. These properties make it an excellent material for making wood-burning furnaces. The furnace becomes hot and radiates that heat into the room. It also holds heat, keeping the coals hot and often allowing the owner to add more wood without the need for kindling.
Engineers call a material's ability to retain heat “specific heat”. For example, steel's specific heat is .49 kJ/kg K while soapstone's ranges from .84 to 1.09 kJ/kg K, according to The Engineering Toolbox. The ability to hold and release heat slowly, plus its durability, make soapstone our material of choice for efficient home heating.
In the US, heat is typically delivered using forced air ... and air is a singularly bad medium for moving heat. (Listen to the roar of the air handler!) Water is better, but light is best ... and here's where soapstone masonry furnaces literally shine. Masonry stoves convert combustion heat to infrared radiation that is delivered by line-of-sight, heating everything it encounters on its way – air, furniture, people, walls – soundlessly and at the speed of light. A typical massive masonry furnace will radiate for 12-24 hours after firing.
|updated 11 May 2014 : m : 10:10 Caspar (Pacific) time|
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