Well, in that mode a heat pump is exactly the same as your air conditioner with the same characteristics. The limitations are those of the fluids being used in the compressor system to transfer the heat.spray the outside fins with something that evaporates like water and the efficiency will improve dramatically. Spray with something like alcohol or ether and it will improve more.
Dale Leavens, Cochrane Ontario Canada [EMAIL PROTECTED] Skype DaleLeavens Come and meet Aurora, Nakita and Nanook at our polar bear habitat. ----- Original Message ----- From: Shane Hecker To: 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 Rossi To: blindhandyman Sent: Monday, August 27, 2007 11:09 AM Subject: Re: [BlindHandyMan] efficiency of heat pumps 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 efficient than straight electric. High efficiency heat pumps are about 200%, or twice as efficient as straight electric. The curve drops off below 40 to about 1 to 1 around 0 degrees F. Of course, they are amazingly efficient if it is 80 degrees outside and you like your house at 85. -- Blue skies. Dan Rossi Carnegie Mellon University. E-Mail: [EMAIL PROTECTED] Tel: (412) 268-9081 ---------------------------------------------------------- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.10/976 - Release Date: 8/27/2007 6:20 PM [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]
