Take the edge off, for pennies a day.
Improve your comfort year-round
Use a Ceiling Fan; Adjust Your Thermostat
Using a ceiling fan on hot days lets you raise your thermostat by 2 degrees F. Don't forget to use it, too, at low speed, to drop warm air from your ceiling to the floor during the heating season; then, lower your thermostat. (Don't worry about using the seasonal direction switch unless the fan creates too much draft wherever you're sitting.)
Improve Upstairs Comfort
Live in an older, two--story home with an uncomfortably warm upper floor in summer? Use ceiling fans --- in occupied upstairs rooms --- to improve comfort without leaving the downstairs too chilly. Still, not comfortable upstairs? Try running your HVAC system's fan around the clock. Run it on high speed and drop the speed once you're comfortable upstairs.
Choose a Right-Sized Model
If your fan is too small for your space, you'll be less comfortable. An oversized model may ruffle your curtains and the papers on your desk, and be too much in winter. Narrow your many fan choices by using this Energy Star tool to determine what size fan you need for your space.
Buy an Energy Efficient Model
If you'll use the fan more than occasionally, it's smart to choose an energy efficient model. Once you determine what size fan you need, use this product finder to find a suitable Energy Star rated model. Most come in a range of styles and finishes to coordinate with your decor and tastes. Local vendors keep many such models in stock.