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re: not needed--pyjamas
17 dec 2001
wrote:
>...using the laws of physics, there is all that energy saved by not
>having the furnace on. the cost of reheating the house in the morning
>is simply calculated using the temperature differential as a basis.
the average temp diff... the house takes a while to cool off.
>the number of hours that the house wasn't heated is irrelevant.
>just the temp. differential (and the size of the house, of course...
bigger houses tend to have bigger time constants. an 8' cube that
expands to 16' with no more floors or internal walls would have the
same time constant, but the extra floors and walls add more thermal
capacitance.
nick
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