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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.

Identifying the source of noises is your first step to soundproofing a room without overspending. Generally, sound comes from inside or outside of the house. Inside noises include creaking floors, living noises like TVs in the living room, cooking sounds, or kids being kids. External noises generally include incremental weather, disturbing neighbors, and street traffic. Inside noises require you to soundproof floors, ceilings, and doors, whereas outside noises may require you to soundproof your attic, windows, and walls facing the streets.

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.

If you’re removing a ceiling fan without visible screws, start by locating the fan canopy—a round cover placed above the fan blades and motor. There should be a thin ring that can be turned counterclockwise to remove the canopy and reveal the screws. After unscrewing the fan, you can disconnect the wires and remove the entire fan from the mounting hardware. For safety, make sure the fan switch is turned off before you remove the canopy. It may be easier to remove the fan blades first, too.