On 09 Jul 2005 12:30:17 GMT, Andrew Gabriel wrote:

Not that I really approve of dumping large amounts of heat
outdoors,

Neither do I. Maybe an option if the OP has the space is a small pump
(perhaps a solar powered) and lots of black hose pipe. On a day like
today there will be a considerable temperature rise in the water
flowing through the hose.

ISTR last year someone building a pool heating system using this
technique and been very happy with the results. Google?

--
Cheers
Dave. pam is missing e-mail