How to Use Cool Basement Air to Cool the Upstairs

1. 
   

   Shut all of your home's windows and doors to the outside except for one window on your home's top floor. The window should be in the farthest possible corner that faces south. Close all other window blinds, curtains or drapes to prevent the hot summer sun from overheating your home.

2. 
   

   Position a box fan in the opened window. The fan should face the outside as this will help suck hot air from the home. If you do not own a box fan, simply keep the window open. The method will still work, albeit a little slower, without the fan.

3. 
   

   Open a basement window in the farthest opposite, or north, corner of your home to cool the entire house. This home-cooling method is referred to as stack or convective ventilation. In this system, a window opening in the lower part of the home brings air into the home, which becomes cool from basement temperatures, while an opening on the upper floor pulls hot air out.

4. 
   

   Keep your basement door open to easily allow cool air to enter the rest of the house.

5. 
   

   Install a ceiling fan near your basement entrance, such as in the kitchen near your basement doorway, to promote circulation of basement air into the rest of the home.

   Things You Will Need

   • Box fan

   • Ceiling fan

   Tip

   Have a professional contractor install a cold air return gadget in your basement. This tool promotes cool air circulation through duct work and other house "passageways."

   Use weatherstripping and caulk to prevent hot air from seeping into the home through cracks and crevices.

   Plant bushy trees and bushes around the home to keep it cool in the summer and warm in the winter.

   Place heat-reflecting film on sun-facing windows.

   Cool a floor of your home by opening windows at opposite ends, which is referred to as "cross ventilation."

   https://homeguides.sfgate.com/use-cool-basement-air-cool-upstairs-26738.html