I am a home owner with a recently installed dual fuel (natural gas and heat pump) system. I have a thermostat that allows me to adjust the balance point. As the weather has been getting cooler here in Pittsburgh I have been exploring but have not yet found the limits of the heat pump. So far I have not had any problem with the heat pump maintaining the set temperature or complaints relative to blowing cool air. When I contracted for the system, high gas prices made it obvious that using the heat pump to the limits of its ability to heat the house would be most economical. A recent drop in the gas price, however, has given me the incentive to accurately calculate the economic balance point. From reading some of the threads on this forum I understand how this is done but I find that I am unable to locate COP data for my heat pump installation. It does not seem to be available from the American Standard web site. This is my equipment:
Heat pump: Heritage 14, 2 1/2 ton, 4A6H4030B1000AA
Indoor Coil: 4TXCB031BC3HCAA
Furnace: Freedom 95, Comfort-R, AUH2B080A9V3VA
I did find COP data for a comparable Goodman heat pump. If I cannot get actual manufacturer's data from American Standard will I be pretty close if I use the Goodman COP data? Perhaps I should reduce the Goodman COP figures by about 7% since I figure that my HSPF with this coil is only about 7.9 while the Goodman heat pump probably is about 8.5. The Goodman model that I used is a 2 1/2 ton unit, model SSZ140301A.
I have enjoyed reading many of the threads on this forum and appreciate the good information that you have freely given. I thank you for any help that you can give me on these questions.