My last heating bill was excessively high and I am trying to figure out what is going on.
I have two heat pumps. The first unit is a 3 ton Goodman (seer 13) that produced a delta T (air duct outlet temperature-inlet duct temperature) of 20 when the outside temperature was 52. The second unit is a 2.5 ton Goodman (seer 13) which produced a delta T of 24.
Do these number make sense. What temperature rise should I expect at this outdoor temperature? I would expect the units to be efficent under these conditions. I am well aware that at low temperatures the efficentcy drops.
Thanks for the help.