A common complaint we hear is, “it’s too cold in the basement and way too hot on the second floor.” If this sounds like you, don’t worry, you’re not alone.
Many 2-story homes depend on a single furnace and air conditioning system to care for multiple levels. One way to help is to try setting the fan control switch on the thermostat to “ON.” This enables the fan to run continuously, which keeps the air mixed and temperatures even. It’s not hard on blower motor and if you have a furnace with a variable speed motor, the fan runs for just a few cents a day. It should also be near silent. However, if you do not have a variable speed motor, this can use quite a bit of electricity and can be noisy.
If the return air inlets in your home on the second floor are located low on the wall, you may want to consider relocating them. A high position on the wall directly over the original location will pull the hotter air back into the system. This also mixes it with air from different levels and rooms for a more even temperature throughout the house. This is a good idea to keep summer and winter temperatures balanced.
One of the best ways to eliminate uncomfortable rooms is to install a ductless air conditioning unit in the space with uneven temperatures. This keeps the temperature where you want it, in the space you need, without the whole house system over-working. This is a much more efficient way to cool and far less frustrating than keeping the lower floor 10 degrees cooler just to be somewhat comfortable when you retire for the evening.