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
