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Here's what you do: set your upstairs thermostat to your desired temperature goals, and then set your downstairs unit to be two degrees warmer. For most homes, this naturally encourages a temperature balance that's comfortable and right at your desired temperature goals.Jun 4, 2018

The easy answer is that the heat is getting trapped inside your house, and then the heat rises so it goes upstairs and then it gets stuck in your bedroom. ... Even if you could turn some fans on and take the hot air out of your bedroom in a matter of minutes the heat would just return.

If your kitchen and bathroom don't have fans or air vents, open a window to let some fresh air in after you've showered or while you're cooking. Take shorter showers with the water temperature turned down as low as you can stand it. Utilize your lids while you're cooking to keep steam from escaping as much as possible.Aug 23, 2016

When you close the air vents in unused rooms, it's much easier for the heat exchanger to crack, which can release deadly carbon monoxide into the home. ... Make sure you have a carbon monoxide detector installed in your home, and keep those air vents open.Dec 27, 2017

Poor Sealing, Insulation, and Ventilation

One of the biggest reasons the upstairs gets so hot is that the current sealing, insulation, and ventilation systems are not working correctly. ... To top it all off, improper ventilation can result in an inadequate amount of airflow, making it difficult to stay cool naturally.May 22, 2019

The general rule of thumb for a two-story home is that you should set each thermostat two degrees Fahrenheit apart from the other. During the summer, when your AC is running, set the upper floor at the temperature you actually want in your home. Then set each floor underneath that to two degrees warmer.Aug 12, 2020

• 6 Ways to Keep the Upstairs Cool in the Summer 1 Install a Solar attic fan 2 Purchase black-out drapes 3 Turn off the lights during the day 4 Use ceiling fans to and windows for a cross breeze 5 Make sure all AC vents are open upstairs and close a few downstairs 6 Check for leaks in the window sills – re-caulk if needed. ...

• There’s a bit of a misconception that it’s impossible to cool your upstairs bedrooms without AC. One of the best, lowest-cost methods is with two box fans: Open all bedroom doors to let air circulate. Open the back bedroom window and place a fan in it. Make sure it blows into the room to pull cooler evening air inside.

• This wasn’t very sightly, but it did help us sleep better in the warm summer night. This is another way to cool down the house. Create a cross breeze by opening a window in the downstairs and one upstairs on the sunny side of the house. Upstairs, place a fan on a window sill and blow the hot air out.