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Fan power is measured by CFM, or cubic feet per minute. For every 1,000 feet of square footage in your attic, you need a minimum of 700 CFM. Steeper roofs may need larger fans or about 840 CFM.  You can figure the size of attic fan you need by multiplying the square footage of your attic floor by 0.7. (multiply by 1.2 for a steep roof and 1.15 for a dark roof). That number is the CFM required for your fan to run efficiently.

There are several telltale signs to let you know that your ceiling fan needs servicing or replacement. For instance, if it’s wobbling, rotating too slowly, or if your ceiling fan is making noise such as squeaks, buzzes, and thumps, it’s time to have it looked at by a professional. Not only may it indicate a potential problem with the fan itself, but it could also signal a red flag that it’s improperly assembled or there’s an issue with the wiring.

The most efficient ceiling fan height is 8 to 9 feet from the floor to the fan blades. For ceilings higher than 9 feet, a downrod can be used to lower the fan to the optimal height. This positioning ensures adequate air circulation and maximizes the cooling effect. Remember, fans should be installed at least 7 feet above the floor for safety.

The direction your ceiling fan spins helps create comfortable airflow in your home and can also help cut down on energy costs. 

During summer, your ceiling fan should spin counterclockwise. This will push cooler air downward in a column and help lower your room’s air temperature. In the winter, set your ceiling fan to spin clockwise and at the lowest speed setting. This will pull cool air upwards, displacing the warm air that pools towards the top of your ceiling and bringing it down towards the floor.