Quote:
Originally Posted by destiny826
What other info do I need to provide? The house is a 2 story coloniel (2400 sq. ft) with attic and finished basement. I will not install AC in the basement.
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Fact is the manual/j calculations look at the kind of construction details that make a BIG difference -- windows, doors, overhang, shade , sun, insulation, appliances, ceiling height, air patterns in stairways, and a dozen other things will have an impact onnwhat size unit(s) make sense and what will work best.
Ideally EVERY HVAC contractor would want to install total system with the highest efficenty and comfort and do so AFTER thoroughly measuring all factors that contribute to sensible energy use and weatherization but there are FEW truly do...
Honestly the BEST way to do this is not even to start with an HVAC firm, but with a qualified energy audit, ideally done by a firm with the tools to perform blower door test and thermal imagining and NO incentive to over sell or under size a system. Then you address the insulation / air sealing issues, then you shop for best HVAC...