Similarly, during the winter, you should set the bottom floor to the temperature you want and the top floor two degrees lower. The warm air from the bottom floor will rise, equalizing the temperatures on both stories.
One recommended that the thermostat on the first floor be set to 70 degrees and that the thermostat on the second floor be set at 72 degrees. The other recommended that the thermostat on the first floor be set at 68 degrees and that the thermostat on the second floor be set at 70 degrees.
Zoned systems help solve many of the issues with how to regulate heat in a two-story home. Zoned systems use electrically actuated dampers in the ductwork to redirect hot or cold air where it is needed. With a zoned system, different rooms, bedrooms, or floors of a home can be zoned to have different temperatures.
That is best done with a ceiling fan. A curtains to somewhat close off the path to upstairs might be considered if possible. If you have multiple rooms upstairs, keep all the doors closed (so that only the landing gets the heat).
Set the thermostat on the lowest floor in your home to your desired temperature setting. The upper floor thermostat is then set two degrees lower. The extra heat generated downstairs will naturally gravitate upwards to make up for the slight variation in temperature settings.
Similarly, during the winter, you should set the bottom floor to the temperature you want and the top floor two degrees lower. The warm air from the bottom floor will rise, equalizing the temperatures on both stories.
So in the winter, homeowners can close the upstairs vents halfway, and let the heat from downstairs rise to the second story. And vice versa in the summer; if you want all of the cold air going upstairs, you close the downstairs vents.
Adjust the fan setting on your thermostat.
Change the fan setting from Auto to On to keep the fan blowing continually, which can help with a more even air distribution. Adjust air registers. Keep the air vents/air registers fully open upstairs, and partially close the air vents downstairs.
Heat rises – Blame physics: hot air rises while cold air sinks. That means your upstairs typically gets hotter than your lower levels, even if your air conditioner's working in overdrive. Your roof's hot, too – Unless you have shady tree cover, your roof absorbs a ton of heat from the sun.
Most homes, including multi-story houses, have just one thermostat that controls the temperature throughout. If you own a multi-story home, you should have a thermostat on each floor to effectively control the temperature and save money.
While there are occupants in the house, it is advised for homeowners to set their thermostats between 68 and 72 degrees to promote maximum comfort. A pleasant temperature for everyone in the house, regardless of the apparel they are wearing, is between 68 and 72 degrees, which is neither too warm nor too cool.
During winter, you can go with 66 degrees upstairs and 68 degrees downstairs. In three-story homes, the most energy-efficient settings in summer are 78 on the upper floor, 79 on the middle floor, and 80 on the lower floor.
Adjust your HVAC system's dampers
Adjusting dampers is one way to help regulate heat in a two-story house. If your HVAC system is already set up with zones, take the time to locate and adjust the dampers so that less heat is going to the second floor and more is going to the first.
Adjust Your Supply Vents For Maximum Heating in the Winter
Closing supply vents in higher locations by your ceilings while opening lower ones on floors or close to baseboards. Doing this will direct more warm air to the floor, where it will rise to heat the whole space.
Air doesn't circulate as well up and down stairs, so you will want to put at least one air purifier on each floor. If you have multiple floors, treat each floor as its own section and divide the square footage by 700 to get the number of air purifiers per level.
Whenever possible, keep fresh air circulating in your home. Turning on ceiling fans can keep air moving, and combined with opening windows, can help cross-ventilation. A dirty air filter will reduce clean airflow from your home's heating and cooling system.
Install More Return Vents
Supply air and return air need to be balanced, but there's no such thing as too much return air. By installing more return vents throughout your home, they can trap the air and remove it, improving air circulation.
Many think that by closing cold air returns, the conditioned air is redirected to other areas that the homeowners want, but closing air vents in vacant rooms is far from helpful. Shutting them does not save energy and, in fact, causes more damage than good.