Quote:
Originally Posted by tuccillo
Nope, that won't address the issue. The problem, as I already stated, is that there is insufficient runtime to maintain the temperatures in the bedrooms on the periphery with the thermostat installed in the main living area. The bedrooms cool faster than the main living area. If the system isn't running because heat is not being called for by the thermostat it doesn't matter how many returns you have. The OP already stated that the room warms up OK.
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Thanks for responses so far.
The room does have a return vent in the ceiling and measurements by HVAC company show it is working properly. The main duct that feeds that area of the house was also replaced with a larger one. Other vents on that line partially closed by them to blow even more air to the cold room. No change. The room heats up just fine. It just cools down much too quickly. The rest of the house is OK but when you walk into that bedroom (office now) it's freezing on a cool (or cold) day. Although North facing, sunny or cloudy days make little difference. Home inspector checked with IR camera and no obvious problem with insulation.
It's a Lilac style house. Bedroom on the other end of house is fine. Similar outside wall exposure and similar glass area. Builder has asked what I thought was wrong. I hadn't considered a second zone being the solution.