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The art & science of good ventilation
[ Page 10 of 13 ]

Advertising supplement provided by Broan-Nutone

 

The Wauconda, Ill.-based Home Ventilating Institute (HVI) recommends eight air changes per hour for bathrooms. This recommendation is based on both years of experience and on calculated needs. Performance has been tested through research at Texas A&M, and the results show actual contaminant concentration follows theoretical dilution calculations with excellent reliability. Exceptions to the recommendation may be considered in unusual situations such as when a bathroom is unusually large. In the case of an extremely large bathroom, multiple fans may be required to effectively handle moisture and odor at their respective source.

 

 

Bath fans must be sized to meet HVI’s recommended 8 ACH. Calculate bathroom fan size in CFM in the following way:

  • For an 8' ceiling, take the square footage of the room and multiply it by 1.1.
  • For any ceiling over 8 ', take the height of the ceiling and multiply it by .1375. Take this figure and multiply by the square footage of the room.
    This will equal the recommended CFM’s. (Example- 10' x 12' room with 10' ceilings. 10' x .1375 =1.37 x 120 square feet = 164 CFMs.)
  • Both calculations will give you the minimum recommended CFM.

 

 

Click For Additional Required Reading

To receive AIA/CES credit, you are required to read this additional text. For a faxed copy of the material, call Broan-NuTone Customer Service at (800)558-1711. The following quiz questions include information from this material.

 

 

About Broan-NuTone LLC

Over 70 years ago, two young entrepreneurs set out to make residential environments more comfortable and convenient. Today, the brands Henry Broan and J. Ralph Corbett established lead the residential industry in providing trusted and respected products that make today’s homes even more comfortable and convenient for today’s health-conscience, on-the-go families.

Broan® is a trademark of Broan-NuTone LLC, North America’s leading manufacturer and distributor of residential ventilation products including range hoods, ventilation fans, heater/fan/light combination units, Indoor Air Quality (IAQ) Fresh Air Systems, built-in heaters, whole-house fans, attic ventilators, paddle fans and trash compactors.

NuTone® is a trademark of NuTone Inc, a subsidiary of Broan-NuTone and North America’s leading manufacturer and distributor of residential built-in convenience products including door chimes, central vacuum systems, stereo intercom systems, home theater speakers, medicine cabinets, and ironing centers.

Broan-NuTone is proud to be an ENERGY STAR® partner.

Broan: 800-558-1711 www.broan.com
info@broan.com		 NuTone: 888-336-3948
www.nutone.com
nutonecustserv@nutone.com
Canada: 888-882-7626

 

 
[ Page 10 of 13 ]
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