Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. General principles and requirements— 44 стр.
BS EN 13141-1. Ventilation for buildings. Performance testing of components/products for residential ventilation. Part 1. Externally and internally mounted air transfer devices— 27 стр.
Ventilation for buildings. Performance testing of components/products for residential ventilation. Externally and internally mounted air transfer devices— 24 стр.