2nd floor is colder than the 1st floor in an ICF home
New home, with the ‘guts’ built by a (rather poor) contractor.
Walls are 6-8″ foxblock ICF with energy sticks. Attic insulation is R50. So should be very tight.
Single stage gas furnace. Installed by amateurs, Builder refuses to adknowledge problem and his trades’ incompetence since day 1. Not having a lot of luck bringing them back, and we are speaking through lawyers at this point…let’s just say that during the walkthrough we discovered the HRV inlet/outlet lines were reversed, so little/no fresh air was being drawn into the house.
Anyways, we got that fixed, but now its 74F on the main floor, and only 64F on the 2nd floor. The home has cold air returns in all rooms. At floor level in bedrooms, but near the ceiling in bathrooms (where they connect to the HRV).
When the heat ducting leaves the furnace, it splits into 3 – basement, 2nd floor, 3rd floor. The furnace is in the basement. The HVAC trade put dampers on the 2 round ducts that head upstairs, but nothing on the basement duct.
Hubby has been adjusting the two dampers to the upstairs, and closing the heat registers on the main floor, but its only increased the temperature by <2degrees. It’s awful. We wanted the 2nd floor to be warmer since we are always cold when we sleep. Suggestions for improvement? We are contemplating adding a damper to the square duct, since that’s the shortest run and closest to the basement.
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