On Mon, 09 Jun 2008 08:33:48 -0400, Wolf Kirchmeir wrote:
>> I sometimes think I'd like to have a heat pump, but know a lot of folks
>> around here who've had less than satisfactory experience.
>
> Air-to=-air heat pumps have a relatively low gain factor, on the order
> of 1:1.5 to 1:2. Ground effect heat pumps have gain factors of 1:3 and
> up. Well worth while. Main cost is drilling what amounts to a well,
> which will have to be 100ft or even deeper, depending on local geology
> (water table, type of rock, etc.)
There have been problems in the past with water that has a high mineral
content. Things got plugged up in short order. That problem may have
been fixed, I haven't checked into heat pumps lately.
|
