Air Valves

Systemair's air valves are circular and rectagular diffusers for fresh air supply and air extraction. With their discreet and aesthetic designs and simple ceiling installation, the air valves are ideal for use in schools, meeting rooms and offices, among other places.

Systemair has a wide range of air valves available, such as the TEF-S for ceiling installations. It is a silent, rectangular and compact air valve that has an airflows capacity of 30 to 600m³/h thanks to its adjustability. The TEF-S is suitable for both extract and supply air in circular duct systems, for residences, offices, or hotels.

The EFF circular diffusers are perfect for extract air in ceiling or wall installations. The EFF can also be used for supply air. The diffuser has a lockable central cone which is rotated to adjust the pressure and the air volume. The EFF is manufactured from sheet steel with a white powder-coated finish and available in different sizes..

The BALANCE circular diffusers can be installed directly into a frame or the duct. The BALANCE-E model is designed for extract air and the BALANCE-S for supply air. The BALANCE series is designed with an aerodynamically shaped valve cone and are manufactured from recyclable polypropylene which makes them able to tolerate temperatures up to 100°C. 

The TFF air valve is available in different sizes and has adjustable airflow and a 360° distribution pattern, from which up to 180° can be shielded with a deflector. The TFF consists of a fixed part with springs, an equipped duct connection, a valve seat and a movable front plate. The front plate is held by the central thread bolt and can be moved by rotating. This allows the gap between the plate and the seat to be adjusted to set the required airflow volume. 

The TFF supply air fitting is used with THOR plenum boxes and other air distribution products in demand-controlled ventilation systems.