I am a residential homeowner getting two seperate quotes from independent sources. Was questioning why only 1 zone not two (are they cheaping out).
House is 2700 sq ft, with new in 2012 roof, siding, windows and spray foam in attic. R-19 still exists in attic floor that was there before I bought the house. R-19 on 2nd floor walls, R-13 on 1st floor walls. House sits in indirect sun as there are large trees around it. Not direct sun. I have baseboard natural gas heat that works fine so only new a/c system
2nd floor ductwork. – 1 duct to each 250-300sq ft bedroom (4 of them), 2 side by side ducts to 500sq ft master bedroom. So 6 ducts easy access from handler to 2nd floor.
1st floor ductwork – 4 or 5 ducts run down through closets (that I built in anticipation of a 12 x 12 inch duct to run down from the attic through the 2nd floor closets to the 1st floor.
Both HVAC installers want to just to one zone with two stage 3 ton unit. I feel as 5 bedrooms are upstairs shouldnt I be able to shut off 1st floor (where nobody is during the night) and shut off upstairs during day. With that I would need two zones.
Both Carrier guy and Trane guys prices are similar for a 3 ton unit with one zone. I live in CT where electricity is high. Are they being lazy by not offereing me two zones? Would (2) two ton units seperate be better (but no 2 stage, only single stage). Or as the HVAC installers say set it and forget it, keep house at one temperature the whole summer 24/7.
For the exact same price, the Trane (2 stage)unit is the xl16i vs the Carrier (1 stage) unit is Carrier Performance ACC6 condenser and Performance series FV4 variable speed air handler/controller
For 3K more than the Trane, I get the two stage Carrier Infinity 24anb7 2 stage condenser matched with an Infinity FE4 variable speed air handler and Infinity controller .
I am leaning towards the Trane (as its two stage) but really questioning wasting money by leaving air on either upstairs or downstairs when not in use.