Originally Posted By: rmeyers
This post was automatically imported from our archived forum.
I'm not sure how much we can determine from just the pump Hp and it's Btu equivalence (Power Input) without the manufacturers test ratings on output and performance (COP-Coefficient of Performance). The COP's for the older units were generally 1.5 to 4.
Using 1/6Hp = .17Hp x 42.44 Btu/m =7.21 x 60min = 432.6 Btuh ?? Not being a heat pump expert, I'm not sure if this constitutes what is considered as the Power Input. (Sounds low to me? but hey!)
The COP being equal to the Heat Output (Btuh) divided by Power Input (Kilowatts converted to Btuh)
My preferred method, if you can find the Manufacturer's name and model number, you can cross reference it in the "Preston Guide to Manufacturer's Specifications" to determine the Year, BTU capacity and EER/SEER rating of the unit.
On the newer models there should be a HSPF (Heating Seasonal Performance Factor) on the Energy Guide Label. (Current Minimum 6.8) This newer rating includes both the very efficient heating by the compressor and the less efficient heating done by the electric resistance elements.
On the cooling side the current minimum Fed Standard for the SEER rating (Seasonal Energy Efficiency Ratio) is 10.0.
I would highly recommend using the NACHI library to get the video "A/C Heat Pump Seminar" by Joe Scaduto. I just signed up for it myself. I'm sure it will be informative as well as entertaining. I have a couple of Joe's books that have been very helpful over the years.
There is also a Dept. of Energy web site with Heat Pump information.
Not sure these comments have been helpful but it's something I could use some more information on myself!
Have a GREAT DAY!