Key Features

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

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

• Square fascia for a tidy, modern exterior finish

• Brown durable plastic fascia for discreet looks on darker surfaces

• Designed for external wall mounting; suitable with intermittent or continuous fans

What’s Included

• MONV292B gravity grille (brown) with Ø150 mm rear spigot

• Fixings as supplied by manufacturer/pack (if applicable)

Ideal For

• External termination of kitchen, bathroom, WC, utility and MEV/dMEV duct runs using 150 mm duct

• Projects needing a brown grille to match façades/soffits or planning requirements

Installation Notes

• Core and connect to Ø150 mm duct; seal joints for airtightness and weather protection

• Mount vertically so gravity flaps swing freely; keep outlet clear of obstructions

• Where exposed, consider a cowl or position to minimise wind-driven rain

Maintenance

• Wipe fascia; clean gravity flaps periodically to prevent sticking

• Inspect seasonally for debris or insect ingress

Technical Overview 

• Type: Round gravity grille with backdraught flaps

• Spigot: Ø150 mm (rear)

• Fascia: Square, brown finish

• Mounting: External wall outlet

• Range: Matching white/other colours available