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  1. #1
    there are alot of old and new fan motors out there and i was wondering what is a good range for cfm for:

    cooling speed, low and high fire fan speeds, as well as the continuous low speed fan for circulation

    thanks in advance

    don

  2. #2
    Join Date
    Mar 2006
    Location
    cincinnati, ohio
    Posts
    258
    That depends on the size of the unit
    Knowledge comes with experience

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    You need a magnehelic or manometer to test the ESP,then the fan data chart(s) for the air handling side ,to set the proper cfms on every job,when they have PSC motors.

    VS setup properly is a lot easier.

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