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[QUOTE=Tommy knocker;14193411] OP was quoated a 4 ton zoned system by an HVAC contractor who apparently came out and looked at it. Another contractor quoated 2 systems at 4 1/2 total tons. I don't...

Thanks for the insight. I will ask him what he feels about going with a 3.5 ton unit.

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Although temperatures aren't that high here in NYC, the humidity kills. Don't know if that affects the tonnage or not.

I should add that my cellar (7.5' ceilings) is fully finished and will be...

My house currently has 150AMP service and my electrician and locality cleared me for central AC.

As far as the ductwork, I was going to sit with the HVAC contractor when I decide which route to go...

One of the HVAC contractors that spec'ed Central AC, told me I should put 1 AH in the attic and wanted to use Carrier Infiniti FE4A (4 ton unit) for the entire house. He said you can make 2 zones...

I am either going to spray the foam (like the exterior walls) or place fiberglass in rafters. This is another one of those, it depends which contractor you ask. I will probably go with the open cell...

I am a home owner and building a new home in Queens, NYC.

The house will be 2 floors, each approx 1,000 sq feet and the cellar which will also be approx 1,000 sq feet. I will spray foam insulation...