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Homes without adequate ventilation can have lingering odours and high humidity levels. ENERGY STAR® certified ventilation or exhaust fans including bathroom/utility room fans and range hoods, can provide the necessary ventilation to minimize or eliminate these problems resulting in a healthy indoor environment.

Ventilation fans have an electric motor that powers a fan. Moist air is drawn up through the fan into ductwork that exhausts to the outside.


  1. removable grille
  2. ventilation fan
  3. duct work vented outside
  4. roof vent cap
  5. timer/humidistat control switch
  6. interior ceiling

Did you see a building science or energy efficiency term you did not understand? Check out our glossary.