CFM to HP?

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beegee

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I have a list of mechanical equipment with cfm ratings, but no power information. Does anyone know how I can determine the load based on the given cfm's?
 
beegee said:
I have a list of mechanical equipment with cfm ratings, but no power information. Does anyone know how I can determine the load based on the given cfm's?
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Too many unknowns. Depends heavily on motorand impeller efficiency if just equipment ratings. If actual air movement ratings (assuming we are talking air handlers), duct size/shape/turns, distance, differential pressure, and so forth also need to be figured into the picture.

However, if just equipment ratings, a temporary fix would be to just choose a brand and use their numbers.
 
Cfm and HP are to totally imcompatible units of measure. It's like comparing pounds to gallons.

I'd suggest submitting an RFI.
 
Smart $ said:
Too many unknowns. Depends heavily on motorand impeller efficiency if just equipment ratings. If actual air movement ratings (assuming we are talking air handlers), duct size/shape/turns, distance, differential pressure, and so forth also need to be figured into the picture.

However, if just equipment ratings, a temporary fix would be to just choose a brand and use their numbers.
Click to expand...

CFM and horspower requirements change significantly with rpm for centrifugal fans. I have borrowed information from a mfg to compare with equip of an unknown source and came suprisingly close to final requirements.
 
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