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re: sizing a heating system
23 jun 2000
news wrote:
>http://www.gaia.org/secretariats/genoceania/documents/autnmshse.html
>...emphasises that... the heat pump, which extracts heat from the fan
>in the composting toilet will make it a zero fossil fuel house.
seems to me that won't help a lot, unless the owners toss in lots of
sawdust, grass clippings, ag waste, etc. the humanure handbook says a
typical human produces 0.5 pounds per day with about 75% moisture by
weight. dry compost has about the same heating value as wood, before
composting, ie about 12k btu/lb (7.7 kwh/kg.) the main heat output is
warm moist air. a large window air conditioner might be a good way
to heat a house with a composter.
nick
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