Hello all. I am getting ready to have a complete heat pump installation done on a 1978 home that had electric baseboard heat and window A/C units. I have had load calcs done by two different companies. They came up with the following:
Contractor 1: Equipment total load: 27,130 Btuh, required capacity of 2.6 tons, sized a 3 ton unit
Contractor 2: Equipment total load: 21,178 Btuh, required capacity of 2.2 tons, sized a 2.5 ton unit
Should I be concerned with the load calc differences? Is 2.6 tons close enough to go with a 2.5 ton unit? I was impressed with both contractors, but Contractor 1 has definitely provided the most information and is the most responsive to my questions. He gave four equipment options. I have narrowed it down to two. Is one better than the other and why? Thanks in advance for your responses!
Option 1: Carrier Comfort Series 25HCC536 Heat pump condenser with a FX4 air handler. 15 SEER. One year labor, ten years parts warranties. ($ more expensive than option 2)
Option 2: Amana ASZ140361A Heat pump condenser with an AEPF variable speed air handler. 15 SEER. One year labor, ten year parts, and lifetime compressor warranties.
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