Verplas 150mm White Metal Adjustable Extract Air Valve

Description

The Verplas MW154 is a 150mm diameter white powder-coated steel adjustable exhaust (extract) extract air valve for mechanical ventilation systems. It provides an adjustable, high-quality extract terminal for ceiling or wall mounting, with a male spigot for direct connection to the System 150 duct. The adjustable inner core allows flow to be set precisely at commissioning for accurate whole-house ventilation balancing.

150mm

Spigot Diameter

Steel

Powder-Coated White

Adjustable

Flow Setting

Extract

Air Function

Ceiling/Wall

Mounting

Extract vs Supply: The MW154 is an extract air valve — for use at stale air removal points (bathrooms, kitchens, utility rooms). The equivalent MW153 is the supply air valve. Both share the same 150mm System 150 spigot.

Key Features

White Epoxy Powder-Coated Steel

Robust powder-coated steel construction provides a premium, durable finish suited to both domestic bathrooms and commercial interiors.

Adjustable Inner Core

The adjustable central disc enables precise airflow setting on site — critical for balancing extract rates across multiple room terminals in MVHR and dMEV systems.

150mm Male Spigot

Connects directly inside the System 150 duct socket — no adaptor required for standard System 150 installations.

Ceiling or Wall Mounting

Suitable for horizontal ceiling or vertical wall installation, with the male spigot orientating into the duct as required.

MVHR & dMEV Extract Point

Ideal terminal for MVHR extract branches, continuous mechanical extract, and single-room fan extract in bathrooms, kitchens, and utility rooms.

Matched to MW153 Supply Valve

Pair with the MW153 supply valve for a consistent, professional appearance across all supply and extract terminals.

Specifications

Verplas SKU	MW154
Function	Exhaust / Extract Air Valve
Diameter	150 mm
Material	White epoxy powder-coated steel
Inner Disc	Adjustable for flow setting
Mounting	Ceiling or wall
Spigot	150mm male — connects to System 150 duct socket
Matching Supply SKU	MW153

Frequently Asked Questions

How is the MW154 extract valve adjusted?

Rotate the inner disc to restrict or open the aperture. Set each valve at commissioning using a flow measuring instrument to achieve the target extract rate (typically 8 l/s for a bathroom under Part F).

Is this valve suitable for use in a bathroom?

Yes — the MW154 is a primary choice for bathroom, kitchen, and utility extract terminals in whole-house mechanical ventilation systems.

What is the material finish?

White epoxy powder-coated steel, providing a durable, cleanable surface resistant to the humid conditions in bathrooms and kitchens.

Does the MW154 include a back-draught damper?

The valve itself does not include a damper. In MVHR systems, back-draught prevention is typically provided by the unit. For single-fan extract, a damper can be fitted at the VKC363 connector upstream.

Can this valve be used in a commercial installation?

Yes — the robust steel construction makes the MW154 suitable for light commercial applications as well as domestic use.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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