Metal external grille with gravity shutters 450 × 450 mm for Ø400 fan, grey

External protection for exhaust ventilation

The metal ventilation grille with gravity shutters is intended for installation on the outside of the building as part of an exhaust ventilation system. It is suitable for fan Ø400 and helps protect the inside of the ventilation system from the effects of the external environment.

Main advantages

• Gravity shutters prevent air backflow and are used in exhaust ventilation.
• Protection of the inside reduces the ingress of external impurities into the ventilation system.
• Lower heat losses the shutters help limit unwanted airflow when the system is not operating.
• Durable design the frame is made of high-quality metal with a polymer coating, and the shutters are made of durable PVC.
• Appropriate size the external dimension of 450 × 450 mm and the internal frame dimension of 400 mm are intended for fan Ø400.

Use and installation

The grille is used in ventilation, heating and air conditioning systems, mainly on the outside of the building as the final element of exhaust ventilation. The grey colour provides a neutral appearance on different exterior surfaces.

When installing, consider the fan size Ø400, the internal frame dimension of 400 mm, the fixing hole spacing of 386 mm and the depth of 25 mm. The grille has four fixing holes with a diameter of 4.8 mm, so before fastening check the correct alignment and surface.

Frequently asked questions

For which fan is this grille suitable?

The grille size is intended for fan Ø400. The external dimension of the grille is 450 × 450 mm.

Do gravity shutters prevent air backflow?

Yes, gravity shutters prevent air backflow, protect the inside from external impurities and reduce heat losses.

What materials is the grille made of?

The frame is made of high-quality metal with a polymer coating, and the shutters are made of durable PVC. The colour of the grille is grey.

Conclusion

The metal external grille with gravity shutters is a practical finishing element for exhaust ventilation with fan Ø400. It combines protection, prevention of backflow and simple external installation.