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Field glossary

Pressure class

The operating static the duct is built to hold, in inches of water gauge, positive or negative

Used across 2 Anvilfield field guides, most in HVAC.

Also defined as

  • Datacenter: The static pressure a duct is built and tested to: 1/2, 1, 2, 3, 4, 6, or 10 in wg

Where this shows up

HVACSheet metal duct fabrication field guideDatacenterDuct leakage pressure testing

Related terms

Leakage class (CL)Transverse jointCLGaugeSeal class (A/B/C)

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