Exhaust air valve diameter 125 mm. Scandinavian style, galvanized steel exhaust air valve. Exhaust air valves are used in the indoor places such as offices, houses, etc. They can be installed on the ceilings or on the walls to enable air exhaustion from a closed up space. Exhaust air valves allow a smooth adjustment of the air flow rate by rotating the control disc in the center. The air flow rate depends on the opening ratio.
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