Duct leakage class in standards like SMACNA/ASHRAE is commonly expressed in terms of cfm/ft² of surface at a reference static pressure, which is intended to improve what?
Choices
- (A) Energy loss and fan kW, and to achieve measured leakage targets on TAB tests
- (B) Concrete form pressure
- (C) Pile cap area
- (D) Sump pump NPSH only
Correct answer: (A)
Energy loss and fan kW, and to achieve measured leakage targets on TAB tests
Explanation
Leakage classes (e.g. A/B/C) reduce unintended OA/return losses — SMACNA.