Online Arzel Bypass Calculator

This calculator only provides an estimate of bypass capacity needed.

Consideration of duct style, equipment location, diffuser style, etc.
can influence actual bypass capacity required.

For more information on factors that can impact bypass sizing, please visit our Bypass Sizing Adjustments page.

If you would prefer to download and use the Excel version of the calculator, please click here.

A/C Tons
Trunk Dampering? (check if "yes")
Smallest Zone Size
R-6
R-7
R-8
R-10
R-12
R-14
R-16
8" x 10"
8" x 12"
8" x 16"
8" x 20"
8" x 30"

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