I live in a 2000 square foot house in Hot, Humid Myrtle Beach South
Carolina. I have a 2 ton heat pump with 4 KW strip heat. It does just
The proper size for your house depends on YOUR house, climate,
insulation, construction, glass area and direction and type, duct
leakage, etc. It is possible that it is undersized but that can not be
determined from here.
The temperature difference between the outside and inside is determined
by your comfort level and your climate. Here in Myrtle Beach, we use
20 Degrees. IN death Valley you would Size for a lot more. The units
are rated for ARI conditions. You should size them based on Manual J
conditions. Your installing contractor should have done that. If you
are not comfortable, he should make it right under warranty.
Did he seal your ducts?
Did he measure air flow?
Did he do a capacity check?
These are questions I would have for the installing contractor.