Key Features

• Ø125 mm round spigot — direct fit to standard 125 mm duct

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

• Square fascia (~170 × 170 mm) for a smart, low-profile external finish

• Brown durable plastic fascia to complement darker façades/soffits

• Designed for external wall mounting with intermittent or continuous fans

What’s Included

• MONV270B gravity grille (brown) with Ø125 mm rear spigot

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

Ideal For

• External termination of bathroom, WC, utility, kitchen or MEV/dMEV duct runs using 125 mm duct

• Projects needing a brown grille to match brickwork, timber or planning requirements

Installation Notes

• Connect to Ø125 mm duct; seal joints for airtightness and weather protection

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

• Check clearance and screw centres against the latest site guide/datasheet

Maintenance

• Wipe fascia periodically; clean gravity flaps to prevent sticking

• Inspect seasonally for debris or insect build-up and remove if present

Technical Overview 

• Type: Round gravity grille with backdraught flaps

• Spigot: Ø125 mm (rear)

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

• Mounting: External wall outlet

• Range: Matching white/other colours and alternate sizes available