Air valves finish the room end of a ventilation duct and set how much air each room gets. There are extract valves and extract-supply valves, each in Ø100, Ø125, Ø160 and Ø200.
Soler & Palau BDOP 100 supply and exhaust air valve Ø100mm – adjustable, quiet plastic air diffuser for ventilation systems in homes, kitchens, and offices.
Soler & Palau BDOP 125 supply and exhaust air valve Ø125mm – quiet, adjustable plastic air diffuser for home and office ventilation systems.
Soler & Palau BDOP 160 supply and exhaust air valve Ø160mm – durable plastic and metal design, adjustable airflow, low noise, ideal for home or office ventilation.
Soler & Palau BDOP 200 supply and exhaust air valve Ø200mm – durable, quiet, and adjustable diffuser for modern ventilation systems in homes and offices.
DVS 100 exhaust air valve Ø100mm DEC International (metal)
DEC International DVS 100 exhaust air diffuser Ø100mm – durable steel ventilation valve with smooth airflow adjustment, low noise, and powder-coated finish. Ideal for homes, offices, kitchens, and bathrooms.
DVS 125 exhaust air valve Ø125mm DEC International (metal)
DEC International DVS 125 metal exhaust air diffuser for Ø125mm ventilation systems – precision-engineered ventilation valve with smooth airflow control, low noise, and durable powder-coated steel design. Ideal for homes and offices.
DVS 160 exhaust air valve Ø160mm DEC International (metal)
DEC International DVS 160 metal exhaust air valve Ø160mm – precision-engineered diffuser for smooth airflow control, low noise, and durable powder-coated steel design. Ideal for home and commercial ventilation.
DVS 200 exhaust air valve Ø200mm DEC International (metal)
DEC International DVS 200 metal ventilation exhaust air valve Ø200mm ensures smooth, precise airflow control. Low-noise, corrosion-resistant, and ideal for home or office ventilation systems.
Fresh Ventilation FTL 100 wooden exhaust diffuser for ventilation systems, Ø100mm connection, with pine front panel, steel frame and adjustable airflow. Ideal for sauna and steam room ventilation. Swedish-made quality.
Fresh Ventilation FTL 125 wooden exhaust air valve for ventilation systems Ø125mm with a matte pine front, white steel frame and adjustable airflow. Ideal for sauna and steam room ventilation. Made in Sweden.
Which valve, and how to set it
An extract valve is for a room where air is taken out, such as a bathroom or a kitchen, while an extract-supply valve works in either direction. Set the valves once the system is installed: open the one nearest the fan least and the one farthest from the fan most. The regulating damper in the branch does the coarse setting, and the valve does the fine setting.
Extract valves
These take stale air out of the room. All four sizes come in steel, and Ø100 and Ø125 also come wood-faced. Screwing the centre of the valve in or out sets the airflow for the room, and that is how the system is balanced.
Extract-supply valves
Because the air can pass either way, one valve serves for supply or for extract. They mount on the ceiling, have a rubber gasket and come in all four sizes: plastic in the two smaller ones, plastic and steel in the two larger ones.
The outside end of a duct is finished with a ventilation grille.
Common questions
What does the air valve do?
It finishes the duct in the room and sets how much air passes. The centre of the valve screws in to pass less air and out to pass more.
What is the difference between an air valve and a grille?
An air valve sits at the room end of the duct, and its airflow can be set. A grille sits on the outside wall and protects the opening from the weather.
Are these air admittance valves?
No. An air admittance valve belongs to a drainage system. These are ventilation valves for the room end of an air duct.
