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Whether you can install a ceiling fan yourself depends on if you're replacing an existing fixture or installing one where no wiring exists. If you are replacing an existing fan, an experienced DIYer may be able to do the job, which can save on labor costs. This work typically doesn’t require a permit, but there’s always a safety risk when dealing with electrical components, so hiring a pro is still a good idea, especially if you aren't handy. Keep in mind you may need a special ladder for high or vaulted ceilings. However, if you are installing a new ceiling fan where there is no current fixture, you must hire a licensed electrician. In most areas, it is required by law that a professional runs new wiring and pulls the necessary permits. Attempting to install wiring yourself can be dangerous and a code violation.

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.

The more surface area that a ceiling fan blade has, the more effective it will be at producing airflow. Therefore, a longer ceiling fan blade is the better option if you’re looking for more wind. However, a longer blade will consume more energy than a shorter blade.

Keeping dust off fans can keep them working optimally and help keep dust mites or bacteria from building up. Dust fans weekly with a duster, microfiber cloth, old pillowcase, or vacuum attachment. You can also try spraying a clean fan with a store-bought dust-repellent product or making a DIY dust-repellent with water and a small amount of liquid fabric softener mixed in.