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Some useful calculations...

notable:  The average California home uses 7700 kWh/year in 2001.  It was 7000 kWh/year in 1980.  Source: CNN 02/26/2001

How do I calculate the energy needed to heat water and estimate "normal" usage of hot water?

       This post is a good explanation of everything...read the whole message to find out how to calculate how much energy it takes to heat water.

               http://groups.yahoo.com/group/awea-wind-home/message/3452

How can I estimate the energy required to heat a home?  Here are the rough calculations...it was intended for heating with a heat pump.

       If you search the archives for the other posts with the same subject, you can see the discussion that brought about this message.

               http://groups.yahoo.com/group/awea-wind-home/message/3171