Verplas 150mm External Gravity Grille Multi-Colour

Description

The Verplas VKC292 is a 150mm external gravity wall grille with a gravity-operated shutter that opens under positive airflow pressure and closes when the fan stops — preventing back-draught, insect ingress, and weather penetration. Designed for external wall mounting at the termination point of a 150mm duct run, it is available in multiple colours to suit different property exteriors. Overall grille dimensions are approximately 185 × 185 × 55 mm, providing a neat, low-profile external finish.

150mm

Duct Spigot

185×185mm

Grille Face Plate

Gravity

Self-Closing Shutter

Multi-Colour

Available

External

Wall Mounting

Colour Options: The VKC292 is available in White, Brown, Grey, and Black — select the variant to match your property's exterior brickwork or render for a discreet, integrated appearance.

External Fitting: The grille should be fitted to the exterior face of an external wall, with the duct spigot passing through the wall to connect internally to the 150mm duct run. Ensure the grille face sits flush against the wall and seal around the perimeter with an appropriate external sealant to prevent weather ingress.

Key Features

Gravity Self-Closing Shutter

The gravity-operated louvre blades open automatically when airflow is present and fall closed when the fan stops — preventing back-draught, insects, and rain ingress without a spring mechanism.

150mm Round Spigot

The integrated 150mm round spigot connects directly to System 150 rigid duct, telescopic pipe, or flexible hose at the wall penetration point.

Four Colour Variants

Available in White, Brown, Grey, and Black for a discreet match to the property exterior — specify the required colour variant at the time of ordering.

185 × 185 mm Face Plate

The compact square face plate provides a neat external appearance with a generous free area for the duct diameter.

Weather & Pest Resistant

The gravity shutter closes under its own weight when no airflow is present, preventing wind-driven rain, insects, and small birds from entering the duct system.

System 150 Compatible

Designed to terminate Verplas System 150 round duct runs at the external wall, compatible with all 150mm VKC-series duct fittings.

Specifications

Verplas SKU	VKC292
Duct Spigot Diameter	150 mm
Face Plate Dimensions	185 × 185 × 55 mm (H × W × D)
Shutter Type	Gravity-operated — self-closing
Colour Options	Beige-RAL1001, Brown-RAL8017, Terracotta-RAL2001, White-RAL9003
Mounting	External wall
Material	White or coloured plastic
System	Verplas System 150 — 150mm Round Ducting

Frequently Asked Questions

Does the gravity shutter work in all airflow rates?

The gravity shutter opens progressively with airflow pressure. At very low flow rates, the shutter may only partially open. For systems with minimal static pressure, consider the cowl-style VKC280 which has a lighter non-return flap.

What sealant should I use around the external grille?

Use a grey or colour-matched exterior silicone sealant around the perimeter of the face plate to prevent water ingress between the grille and the wall face.

Which colour variant do I order?

Specify the colour suffix when ordering — e.g. VKC292W (White), VKC292B (Brown), VKC292G (Grey). Confirm available variant codes with us.

Can this grille be used on a roof?

The VKC292 is designed for vertical wall mounting. For roof terminations, use a dedicated roof cowl or tile vent rated for that application.

Is there a stainless steel version?

Yes — Verplas offers a 150mm stainless steel gravity outlet for coastal or high-humidity environments. Contact your Verplas supplier for the stainless steel variant SKU.

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