I am looking to buy new heatpump. I live in PA where its more on colder side than hot.
I am bit confused as whether I should go with ASZ16 or ASZ18.
The ASZ16 3tonne can give me 16 SEER, 12.5 EER and 9.75 HSPF AHRI 3611050
The ASZ18 3tonne can give me 18 SEER, 13 EER and 9.5 HSPF - AHRI 3611066
The cooling btu and heating btu ( at high and low temp) comes out the be the same in both cases.
So If I do not use AC a lot in summer and use more electricity in winter to heat the house(~1600 Sqft) should I go with ASZ16?
I would think ASZ16 should be considerably cheaper than ASZ18.
I am bit confused as why the ASZ16 is better in terms of heat efficiancy than ASZ18.