Gary Collier said the following to All on the subject of
power source/pump (21 Jan 98  00:13:49)
 GC> I would appreciate some advice regarding a project I am pursuing.
 GC> I intend to retrofit a hot water heater to burn wood and I need a pump
 GC> that will pump the water from a storage tank up 15 to 20 feet and
 GC> through a copper pipe heat exchanger(aluminum fins) placed in a forced
 GC> air system (formerly a functional Heat pump). I intend to use gravity
 GC> to return cooled water in a closed loop to the boiler.
 [ . . . ]
So why can't heat convection be used to move the whole water mass? I ask
because my old home had a hot water radiator system which worked quite
well without any pump whatsoever and it provided ample heat even in -40
degree weather. Perhaps you might look into considering wood pellets or
chips so that feeding the fire could be an automated task?
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