Finish your 150 mm extract runs with the MONV292W gravity grille. The square fascia sits flush to the wall while internal gravity flaps open under airflow and close when the fan stops—helping to limit draughts, insects and weather ingress. The rear Ø150 mm round spigot couples directly to rigid or flexible duct, making this grille ideal as an external outlet for bathrooms, utilities, kitchens and central extract systems (MEV/dMEV). Choose white to blend with lighter façades, stone built walls or soffits; matching colours are available across the range for a consistent site aesthetic.

Key Features

• Ø150 mm round spigot — direct fit to 150 mm duct. 

• Gravity backdraught flaps — reduce reverse airflow when the fan is off.

• Square facia/faceplate ~170mm × 170mm — tidy external finish. 

• White durable plastic fascia; designed for wall mounting. 

• Part of a family with brown/terracotta/Cotswold stone variants. 

What’s Included

• MONV292W gravity grille (white) with Ø150 mm spigot.

• Fixings (as supplied by manufacturer/pack).

Ideal For

• External termination of bathroom, WC, utility, kitchen or central extract (MEV/dMEV) duct runs where 150 mm duct is used. 

Installation Notes

• Core drill ~170–175 mm square clearance for plate; connect Ø150 mm duct to rear spigot. Seal for airtightness/weathering. 

• Mount vertically so gravity flaps operate freely; keep the outlet clear of obstructions. 
  

• Where exposed, consider a cowl or position to minimise wind-driven rain (cowl sold separately). 
  

Maintenance

• Wipe fascia and periodically clean gravity flaps to prevent sticking; check for debris and insect ingress. 

Technical Overview 

• Type: Round gravity grille with backdraught flaps

• Spigot: Ø150 mm (rear)

• Fascia: Square, approx. 170 × 170 mm, white finish

• Mounting: Wall (external outlet)

• Range: Brown/Terracotta/Cotswold Stone colour options available.