Wouldn't your attic be the perfect place for the pre-heat tank?
Maybe a duplicate differential controller that looked at attic temp and tank temp and could turn on a radiator fan an a small circulation pump when tank temp fell below attic temp...
-AC_Hacker
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I'm not an HVAC technician. In fact, I'm barely even a hacker...
Last edited by AC_Hacker; 06-04-11 at 10:42 AM..
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