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Sizing Bath Fans

Tom

When you’re picking a new bathroom ventilation fan, you will often come across the term ‘CFM.’ An abbreviation for cubic feet per minute, CFM quantifies the amount of air that a fan can move. Larger bathrooms require fans with higher CFM ratings.

According to Fantech, the Home Ventilating Institute recommends 1 CFM per square foot in bathrooms up to 100 square feet. Larger bathrooms should be sized based on fixtures. All standard tubs, showers, and toilets add 50 CFM each to the the total. Large tubs and whirlpools require 100 CFM per fixture.

Visit SupplyHouse.com to find a large selection of bath fans from Fantech, Panasonic, Broan/Nutone, and Air King.

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