The water is further heated by five solar-powered electrical pumps, to create radiant heat coming up through the wooden floorboards.

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TC4, however, they trap radiant heat from below, warming things up.

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Suddenly, the entire room exploded in flames, as the radiant heat ignited every piece of furniture, every curtain, every possible fuel source, even the carpeting.

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The 12, 700-square-foot Energy Star-certified house was crafted from low-toxic materials, withstood air tightness tests on the insulation, and has a water furnace geothermal system that provides hot water, radiant floor heat and air conditioning.

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Highlights of the new software include System Match technology with features such as True Radiant and Heat Pump Balance geared to help high-efficiency, non-conventional (i.e. not forced air) heating systems perform even more efficiently.

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Radiant-heated floors provide the home's only heat.

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