Wall-mounted steel air intake and exhaust vents Ventilation finish trim Description The air intake / exhaust vents are square frames fitted with fixed-angle louvres and a wire mesh made of a 1 mm thick wire and mesh opening size of 12.7x12.7 mm. The vents can be installed in walls or at the ends of ventilation ducts. The product is made from galvanized steel sheet. The powder-coated finish in any RAL colour is available on request. The product is provided with the PZH-NIH Hygiene Certificate no. HK/B/1652/01/2007. Note: Available without the wire mesh - product code: WSQ. Available materials — Product code examples CSQ-...-...- galvanized steel sheet Product code example Product code: Technical specifications Selection chart is a registered trademark protected by a technical patent. All modification rights reserved. ALNOR® ventilation systems Effective air flow rate, Veff (m3/h) Effective area [%]