• Phoenix Manufacturing Inc. › Support Center › Calculators › Heat Load Calculator
  • heat-loadHeat Load Calculator

    Use the calculator below to find the CFM required for your specific project. Fill in the following:

    • Dry Bulb Outside
    • Web Bulb Outside
    • Sensible Load BTUH
    • Media Efficiency
    • Inside DB (Design Temp)
    DRY BULB OUTSIDE WET BULB OUTSIDE SENSIBLE LOAD BTUH *MEDIA EFFICIENCY DROP LEAVING AIR TEMP INSIDE DB (DESIGN TEMP) CFM REQUIRED bid unit designation #
    100 80 8000 .8 16 84 85 7600 Example
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    *MEDIA EFFICIENCY
    The efficiency of the different cooler medias are as follows: Aspen = .8 (80%) 8″ CelDek = .85 (85%) 12″ CelDek = .9 (90%) 4×4 Celdek = .935 (93.5%)

    NOTES:
    If a negative CFM appears after all data is entered then design temps cannot be met. If the DB and/or the WB temps are not available, you could use the ASHRAE Design Temperatures for the area.(Close window when done viewing.)