VMC Vent Valves: Extract/Supply, Diffuser, Grille

VMC Vent valves are the terminal components of a professional or domestic ventilation system: fitted within the room itself, they handle extraction of stale air or supply of fresh air. Our range includes adjustable vent valves, connection sleeves, an adjustable circular diffuser and supply/extract grilles, suited to kitchens, sanitary areas, offices and plant rooms. The right choice depends on duct diameter and intended use, extraction or supply.

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VMC Vent

Adjustable Plastic VMC Nozzle + PVC Sleeve

Ventilsogood

bouchepvcmanchon

9.00 Tax excluded

In stock

Create an airflow to ventilate your premises - Supply and return air for ventilation systems- Available in- D 80 mm (Min. flow rate 10 /max. 100)- D 100 mm (Min. flow rate 10 / max. 160) - D125 mm (min. flow rate 20 / max. flow rate 200) - D 160 mm (min. flow rate 30 / max. flow rate 300)- D 200 mm (Min. flow rate 50 / Max. flow rate 400) - 3-prong...

VMC Vent

Single-flow VMC air vent

Ouestventil

bouche vmc auto sple

8.00 Tax excluded

In stock

Single-Flow Self-Regulating Mechanical Ventilation Outlet—Air Supply and Exhaust - For use in a self-regulating ventilation system in conjunction with air inlets or exhaust vents in ventilation systems - Provides a fixed flow rate of 15, 30, 45, 75, 90, and 120 m³/h over a pressure range of 50 to 160 Pa - Each flow rate in m³/h corresponds to a specific...

VMC Vent

PVC Sleeve with Clips for VMC Inlet

Ventilsogood

manchonbouche12580

5.00 Tax excluded

In stock

PVC connector sleeve between the mechanical ventilation outlet and the duct (wall penetration, drywall, suspended ceiling, etc.) Secured with 3 clips. For use with 125-diameter vents: , ALIZE HYGRO TEMPO KITCHEN - ALIZE TEMPO WC - ALIZE VISION WC - ALIZE HYGRO Bathroom with Toilet - ALIZE HYGRO Bathroom - ALIZE ELEC with and without TEMPO - ALIZE HYGRO...

Ventilation Accessories

Adjustable circular diffuser

Ventilsogood

diffuseurair

55.00 Tax excluded

In stock

Adjustable circular ceiling diffuser (vertical or horizontal airflow). Air supply and exhaust. - Air supply and return in ventilation systems, mechanical ventilation systems, commercial kitchens, commercial spaces, etc.- Available in sizes from 160 to 560 mm - WARNING: This is the connection diameter (the intake hole); the diffuser itself will be...

Ventilation Accessories

Air Supply/Return Grille

Ventilsogood

grillextract

35.00 Tax excluded

In stock

Exhaust grille for galvanized duct - For circular ducts, supply or exhaust systems - Dimensions: L 425 x H 75 mm- Compatible with ducts from: D200 to D400 mm- Dual-flow grille- Adjustable opening size (airflow depending on opening: 100 to 400 m³/h) Find all related products at the bottom of the page!

How to choose a VMC vent valve

Choosing a VMC vent valve comes down to three factors: its use (extraction or supply), the diameter of the duct it connects to, and the airflow rate required in the room. In our range, the adjustable plastic vent valve connects using a supplied PVC sleeve, handy if your duct diameter doesn't exactly match the valve. Its manual adjustment allows the flow rate to be set to suit the room's actual needs, meaning the same valve diameter can serve either a WC or a kitchen depending on the setting chosen.

Extract valve, diffuser or grille: what role does each play

The extract valve removes stale air from humid or busy rooms: sanitary areas, kitchens, plant rooms. It screws or clips into the end of the duct. The adjustable circular diffuser performs a similar function but distributes airflow more evenly across the room, a common choice for suspended ceilings. The supply/extract grille, manufactured in Europe, is better suited to external outlets and visible duct runs, on facades or roofs. Three related products, three distinct uses: don't mix them up when ordering.

Single-flow VMC vent valve: adjustable, multi-purpose

Despite its name, the single-flow VMC vent valve (Ouestventil) is an adjustable valve that lets you manually set the flow rate to match the room's actual requirements. The same 100mm diameter reference, for example, can be set to a flow rate of 15 m³/h in a WC or 80 m³/h in a kitchen. The benefit is practical: fewer references to stock, more flexibility of use for the same valve diameter.

Connection: PVC sleeve and clip-on PVC sleeve

When your duct diameter doesn't exactly match that of the valve, a PVC sleeve or a clip-on PVC sleeve make the connection cleanly. The clip-on sleeve fits directly onto the valve for a quick fit, with no gluing or extra fitting required. A small detail that saves a lot of back and forth when working with an existing network that's several years old.

Points to check before ordering

The exact diameter of the existing duct, to be measured on site before placing an order.
The actual use of the valve: extraction of stale air or supply of fresh air, as the two functions aren't interchangeable.
The required flow rate depending on the room served (WC, bathroom, kitchen): an adjustable valve such as the single-flow auto VMC vent valve can be set accordingly, at the same diameter.
Whether a connection sleeve is needed if the valve diameter doesn't exactly match the duct.
Where it will be fitted: indoors (valve, diffuser) or a visible external outlet (supply/extract grille).

Need help choosing your VMC vent valve

Let us know the duct diameter, the flow rate you need, and whether the valve is for extraction or supply: we'll point you towards the model suited to your installation.

To complete your order

Find our full range of ventilation solutions in Ventilation Accessories, and complete your installation with the built-in PVC sleeve or the clip-on sleeve for your connections.

Frequently asked questions

What's the difference between a VMC vent valve, a circular diffuser and a supply/extract grille?

The VMC vent valve extracts or supplies air in a room connected to a duct. The adjustable circular diffuser distributes airflow more evenly, often used in suspended ceilings. The supply/extract grille, manufactured in Europe, is better suited to external outlets or visible duct runs. The choice depends on the location and the finish required, not just the flow rate.

How do I connect a VMC vent valve if the diameter doesn't match my duct?

Use a connection sleeve: the PVC sleeve (supplied with the adjustable plastic vent valve) or the clip-on PVC sleeve, which fits directly onto the valve with no gluing required. Both allow you to join an existing duct to a valve with a slightly different diameter.

Is the single-flow auto VMC vent valve self-regulating?

No, despite its name it isn't self-regulating in the sense of automatic control: it's a manually adjustable valve. The same 100mm diameter reference, for example, can be set to 15 m³/h in a WC or 80 m³/h in a kitchen. This reduces the number of references needed while keeping flexibility of use.

Can any valve be fitted to any VMC network?

The type of regulation on the valve needs to match what's already in place on your network. An adjustable valve is set manually to the required flow rate, it doesn't necessarily replace a different automatic control logic. Check how your VMC unit works before ordering a replacement model.