[AIVC, Air infiltration and ventilation glossary, 1992]:a dimensionless coefficient relating the velocity pressure on the outer surface of the building to the velocity pressure derived from the mean wind velocity at a reference point.

[EN 14511-1:2022, 3.3]:positive pressure difference measured between the air (or water) outlet section and the air (or water) inlet section of the unit, which is available for overcoming the pressure drop of any additional ducted air (or water) circuit.NOTE Expressed … Continue reading →

[EN 13141-7:2021, 3.12]:pressure increase induced by the ventilation unit given as difference between the static pressures at the unit outlet and the unit inlet.Note 1 to entry: The external static pressure difference is used to determine the maximum air volume … Continue reading →