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Ceiling Fan CFM
- Thread starter texanman
- Start date
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- #3
This may or may not help as there is no relation to fan size here. This is a cut-and -paste from the web.
ENERGY STAR specification defines residential ceiling fan airflow efficiency on a performance basis: Cubic Feet per Minute (CFM) of airflow per Watt of power consumed by the motor and controls. Efficiency is measured on each of three speeds.
* At low speed, fans must have a minimum airflow of 1,250 CFM and an efficiency of 155 CFM/Watt.
* At medium speed, fans must have a minimum airflow of 2,500 CFM (3,000 CFM by October 1, 2003) and an efficiency of 110 CFM/Watt (100 CFM/Watt by Oct. 1, 2003).
* At high speed, fans must have a minimum airflow of 5,000 CFM and an efficiency of 75 CFM/Watt.
ENERGY STAR specification defines residential ceiling fan airflow efficiency on a performance basis: Cubic Feet per Minute (CFM) of airflow per Watt of power consumed by the motor and controls. Efficiency is measured on each of three speeds.
* At low speed, fans must have a minimum airflow of 1,250 CFM and an efficiency of 155 CFM/Watt.
* At medium speed, fans must have a minimum airflow of 2,500 CFM (3,000 CFM by October 1, 2003) and an efficiency of 110 CFM/Watt (100 CFM/Watt by Oct. 1, 2003).
* At high speed, fans must have a minimum airflow of 5,000 CFM and an efficiency of 75 CFM/Watt.
Do larger ceiling fans generally use more power, while moving more air?
KiwiMace
Mechanical
- Feb 2, 2006
- 1,012
Bigger non-residential fans typically have better efficiencies from aerofoil blades etc.
Looking at the big ass fan catalog: 225 W/cfm based on the motor size of the 24' fan, not the absorbed power.
Looking down the size chart, I think that this might be one of the better operating ranges however. Still, a significant improvement over the energy star figures.
Looking at the big ass fan catalog: 225 W/cfm based on the motor size of the 24' fan, not the absorbed power.
Looking down the size chart, I think that this might be one of the better operating ranges however. Still, a significant improvement over the energy star figures.
KiwiMace
Mechanical
- Feb 2, 2006
- 1,012
Forgot my ref:
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