Size it right Although manufacturers' packaging typically lists formulas that relate specific room size to the blade span of a fan, there are some general guidelines.
  • Up to 50-sq.-ft.-room: 30-in. span
  • 51- to 100-sq.-ft. room: 36-in. span
  • 101- to 200-sq.-ft. room: 42-in. span
  • 201- to 400-sq.-ft. room: 52-in. span
  • More than 400-sq.-ft. room: 54-in. span
Remember, in long, narrow spaces or in very large rooms, you can install more than one fan.

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