I have essentially the same issue. All homes in my area have returns in each room (as they should). The front bedroom has 3 outside walls plus the front wall is covered with windows. Windows, even double pane, have low insulating value and the walls are pretty low also.The heatloss is greater than the main living area where the thermostat is located. When our system kicks on the room also warms quickly but the system runtimes are not very long and the room cools down quickly. I see about 4 degrees difference between the main area on a cold day, before the system kicks on. The volume/area ratio works against smaller rooms on the periphery.
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Originally Posted by HiHoSteveO
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.
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