Exhaust Ventilation Systems Are Simple and Dependable
UPDATED March 1, 2014
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Exhaust Ventilation, including:
- Design and build strategies
- Necessary codes
- Application how-tos
- Using materials
Exhaust fans are the easiest way to provide mechanical ventilation for a house
Choose a quiet fan that's not too powerful
Exhaust fans are rated for both the volume of air they move per unit of time (measured in cubic feet per minute or cfm) and the amount of noise they make (measured in sones, where the lower the value the quieter the fan).
An exhaust ventilation system does not need a powerful fan. According to the requirements of ASHRAEAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). International organization dedicated to the advancement of heating, ventilation, air conditioning, and refrigeration through research, standards writing, publishing, and continuing education. Membership is open to anyone in the HVAC&R field; the organization has about 50,000 members. Standard 62.2, a 2,000-square-foot house with three occupants requires only 42.5 cfm of mechanical ventilation.
Oversized fans waste electrical energy and space heat. If they are very powerful, they can cause ...
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