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Building RMH in existing basement

 
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We are wanting to put a RMH in the basement of a regular stick built house that has a poured concrete floor and cinder block walls. If we build the RMH coupled to the floor and walls - won't we be heating the ground underneath? Thanks
 
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Location: NH
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I did the very thing, building in the basement, but I didn't couple the heater to the walls. The burn chamber floor is a layer of kiln bricks directly on the concrete floor, so the floor heats up pretty nicely, acting like a thermal battery. After the fire is out, even eight hours later the floor around the base of the heater is still warm.

I keep the heater running all day so the entire basement acts as my battery, then the stored heat just kind of emanates [convection] upwards through the night, keeping the second level around 65ºF even when it's well below freezing outside.
 
The only taste of success some people get is to take a bite out of you. Or this tiny ad:
Heat your home with the twigs that naturally fall of the trees in your yard
http://woodheat.net
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