Dear Dan and list members:
A well engineered heat pump can operate on one twelfth or less of the
electricity required to operate strip heaters, at outdoor temperatures above
thirty degrees F. When the temperature drops below thirty, the efficiency
drops, and there is a point, near zero F,
Interesting Cliff,
Thanks for the info. I wonder though, if everyone starts using ground
water heat pumps, in a given area, won't the temperature of the aquifer
begin to drop? Thus making all the heat pumps less efficient?
Yeah yeah yea, so much water, such a little dent, but then again, I sa
so far, I have read a bunch of stuff online, anything from individuals
without hard numbers I have had to dismiss since they are all over the
place about heat pump efficiencies. The stuff with more realistic numbers
indicate that at 40 degrees F, standard heat pumps are about 180% more
efficie
I'd be curious to know how efficient they are when it's over 100 outside and
you want the house at 75.
Shane
- Original Message -
From: Dan Rossi
To: blindhandyman
Sent: Monday, August 27, 2007 11:09 AM
Subject: Re: [BlindHandyMan] efficiency of heat pumps
: blindhandyman@yahoogroups.com
Sent: Monday, August 27, 2007 8:58 PM
Subject: Re: [BlindHandyMan] efficiency of heat pumps
I'd be curious to know how efficient they are when it's over 100 outside and
you want the house at 75.
Shane
- Original Message -
From: Dan R
Wouldn't the overall change in the temp of the aquifer depend on
the ballance of cooling versus heating in the overall "system"?
If you pull heat out of the underground water more than you push
it back in, maybe you'd eventually freeze the whole aquiffer up
and what might that cause!
Therese an
