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- Uses less energy than air conditioning and contains no chlorofluorocarbons.
- Brings fresh air into the room while expelling hot air.
- Typical size is 20”.
- Larger window fans require mounting kits and side panels. The panels support the fan and prevent air from circulating around and back into the fan, resulting in a loss of performance.
- Smaller units are easiest to install, as they come with the panels attached to the fan.
- Used to intake and exhaust, for bringing inside air into a room or expelling inside air out of a room. Better models have electrical reversibility, which allows the user to switch from exhaust to intake without turning the fan around.