DIN CEN/TS 17153 DIN SPEC 94677:2018-11

This document gives guidelines to correct the measured air flow rate when measuring conditions are different from standard conditions. It applies to a power-law formula giving the air flow rate as a function of a pressure difference with an air flow rate coefficient, C, varying with temperature and pressure. This document applies to: - passive elements of air distribution systems with a cross-section area that does not depend on pressure; and - volume flow rate (and not mass flow rate). It does not apply to fans and air terminal devices with automatically controlled openings (variable openings).