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Air Valves: Supply & Extract

15 products

Air valves are the round, adjustable ceiling and wall terminals used on MVHR, mechanical extract and supply systems. We stock eFans galvanised steel supply and extract valves in 100mm, 125mm, 150mm and 200mm, white steel supply and extract valves with a mounting ring, white polypropylene valves for supply or extract in humid rooms, and the Vent-Axia RV125 for Uniflexplus systems. Use the size buttons below to filter, or for help balancing a system, email hello@efans.co.uk or call 0161 399 3825.

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Frequently asked questions

What is the difference between a supply and an extract air valve?

A supply valve has a shaped centre disc that spreads incoming air across the ceiling so it mixes into the room without a draught. An extract valve has a profile that draws air in evenly from around the valve. They are not interchangeable: an extract valve used on a supply duct throws the air straight down. Some plastic valves are designed for either duty and say so in the title.

Metal or plastic air valve?

Metal valves are galvanised or powder coated steel, robust and the usual choice for MVHR and commercial systems. Our white plastic valves are polypropylene, heat resistant to 100°C, and suit humid rooms such as kitchens and bathrooms. Both adjust in the same way.

How do I adjust an air valve?

Rotate the centre disc to open or close the gap, which sets the airflow at that valve. On a system with several valves, each one is set during commissioning so every room gets its design airflow, then locked so it stays balanced. Avoid changing settings afterwards, because it upsets the rest of the system.

How are air valves fitted?

Most fit into a mounting ring or frame fixed to the duct or ceiling, with a quarter turn or spring fixing, so the valve can be pulled out for cleaning without disturbing the duct. Match the valve size to the duct diameter.

Do I need a fire rated air valve?

If the duct passes through a fire compartment ceiling or wall, the fire strategy may call for a fire damper at that point. We stock an air valve with a built-in fire damper for exhaust systems.

How do I clean an air valve?

Pull the valve out of its ring, wash it in warm soapy water, dry it and push it back in. Take care not to turn the centre disc, or mark its position first, so the airflow setting is not lost.

100mm 125mm 150mm 200mm

Showing 1 - 15 of 15 products

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

In stock

Next day delivery
available

eFans SKU: EFMAV100

Air Valve Extract Metal 100mm

100 mm connection
Extract
Metal, RAL 9010

In stock

Next day delivery available

£4.41

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

In stock

Next day delivery
available

eFans SKU: EFMAV100S

Air Valve Supply Metal 100mm

100 mm connection
Supply
Metal, RAL 9010

In stock

Next day delivery available

£4.41

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

In stock

Next day delivery
available

eFans SKU: EFMAV125

Air Valve Extract Metal 125mm

125 mm connection
Extract
Metal, RAL 9010

In stock

Next day delivery available

£5.70

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

In stock

Next day delivery
available

eFans SKU: EFMAV125S

Air Valve Supply Metal 125mm

125 mm connection
Supply
Metal, RAL 9010

In stock

Next day delivery available

£6.30

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

In stock

Next day delivery
available

eFans SKU: EFMAV150

Air Valve Extract Metal 150mm

150 mm connection
Extract
Metal, RAL 9010

In stock

Next day delivery available

£8.40

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

In stock

Next day delivery
available

eFans SKU: EFMAV150S

Air Valve Supply Metal 150mm

150 mm connection
Supply
Metal, RAL 9010

In stock

Next day delivery available

£11.46

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

eFans Air Valve Extract Metal 100mm diffuser, round metal ventilation grille affixed to ceiling or wall

In stock

Next day delivery
available

eFans SKU: EFMAV200

Air Valve Extract Metal 200mm

200 mm connection
Extract
Metal, RAL 9010

In stock

Next day delivery available

£11.66

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

Metal 100mm air diffuser valve for ventilation systems, designed by eFans, showing the durable metal construction and inlet opening.

In stock

Next day delivery
available

eFans SKU: EFMAV200S

Air Valve Supply Metal 200mm

200 mm connection
Supply
Metal, RAL 9010

In stock

Next day delivery available

£13.99

White plastic eFans air valve diffuser mounted on ceiling or wall, 100mm size for supply and extract ventilation.

White plastic eFans air valve diffuser mounted on ceiling or wall, 100mm size for supply and extract ventilation.

Product data sheet

In stock

Next day delivery
available

eFans SKU: PV100

Air Valve Supply & Extract White Plastic Ceiling or Wall Mounted 100mm

100 mm connection
Supply & extract
White plastic

In stock

Next day delivery available

£18.13

White wall-mounted or ceiling diffuser air valve supply from eFans, designed for efficient air distribution in modern spaces.

White wall-mounted or ceiling diffuser air valve supply from eFans, designed for efficient air distribution in modern spaces.

Product data sheet

In stock

Next day delivery
available

eFans SKU: 189625

Air Valve Supply Ceiling or Wall Mounted in White Finish

100 to 200 mm sizes
Supply
White steel (RAL 9003)

In stock

Next day delivery available

From

£18.76

White plastic ceiling or wall-mounted air valve diffuser by eFans, 150mm size, designed for supply and extract airflow.

White plastic ceiling or wall-mounted air valve diffuser by eFans, 150mm size, designed for supply and extract airflow.

Product data sheet

In stock

Next day delivery
available

eFans SKU: PV150

Air Valve Supply & Extract White Plastic Ceiling or Wall Mounted 150mm

150 mm connection
Supply & extract
White plastic

In stock

Next day delivery available

£20.46

White plastic air valve diffuser by eFans, ceiling or wall mounted, 125mm supply and extract vent for ventilation systems.

White plastic air valve diffuser by eFans, ceiling or wall mounted, 125mm supply and extract vent for ventilation systems.

Product data sheet

In stock

Next day delivery
available

eFans SKU: PV125

Air Valve Supply & Extract White Plastic Ceiling or Wall Mounted 125mm

125 mm connection
Supply & extract
White plastic

In stock

Next day delivery available

£22.07

White wall-mounted air valve diffuser by eFans, designed for ceiling or wall extraction systems with a sleek, clean finish.

White wall-mounted air valve diffuser by eFans, designed for ceiling or wall extraction systems with a sleek, clean finish.

In stock

Next day delivery
available

eFans SKU: 189785

Air Valve Extract Ceiling or Wall Mounted in White Finish

100 to 200 mm sizes
Extract
White steel (RAL 9003)

In stock

Next day delivery available

From

£24.47

White plastic air valve diffuser, 200mm, wall or ceiling mounted, by eFans, designed for supply and extract ventilation.

White plastic air valve diffuser, 200mm, wall or ceiling mounted, by eFans, designed for supply and extract ventilation.

Product data sheet

In stock

Next day delivery
available

eFans SKU: PV200

Air Valve Supply & Extract White Plastic Ceiling or Wall Mounted 200mm

200 mm connection
Supply & extract
White plastic

In stock

Next day delivery available

£25.72

Vent-Axia Vent Axia adjustable round valve RV125 for ducting, showing the 125mm Uniflexplus fitting with adjustable mechanism.

Vent-Axia Vent Axia adjustable round valve RV125 for ducting, showing the 125mm Uniflexplus fitting with adjustable mechanism.

Product data sheet

In stock

Next day delivery
available

vent-axia

SKU: 479372

Vent Axia Adjustable Round Valve RV125 125mm Uniflexplus

125 mm connection
Supply & extract
White plastic

In stock

Next day delivery available

£32.66