The Manrose 100mm (4″) External Multi-Fit Fixed Grille is a durable and aesthetically versatile solution for terminating ventilation systems. Whether used for bathroom extractor fans, kitchen exhausts, or general ducted ventilation, these fixed louvre grilles are designed for reliable performance and a clean external finish.

Each grille features a fixed-blade design that allows for efficient air exhaust while preventing the ingress of debris and large insects. The multi-fit compatibility ensures they can be used with standard 100mm (4″) ducting systems, making them suitable for wall, ceiling, or soffit mounting.

Offered in a choice of White, Brown, and Terracotta, these grilles blend easily into a variety of brickwork, render, and exterior surfaces.

Key Features

• Standard 100mm (4″) Size
  Universally compatible with most 100mm round ducting systems, fans, and vent kits.
• Multi-Fit Installation
  Designed for straightforward fitting to external walls, soffits, or ceilings. Compatible with rigid or flexible ducting.
• Fixed Louvre Design
  Enhances airflow while providing protection against wind, rain, leaves, and pests.
• Discreet, Weather-Resistant Finish
  UV-stabilised plastic construction ensures long-term durability and colour retention even under harsh weather conditions.
• Three Stylish Colour Options

• • White: Ideal for modern or rendered finishes

  • Brown: Blends naturally with wooden facades or darker masonry

  • Terracotta: Suited for traditional brick or clay tile exteriors

Applications

• Bathroom and kitchen extractor fan terminals
• General domestic or commercial ventilation outlet
• Suitable for soffit, wall, or ceiling installation
• Works with in-line fans, tumble dryer venting, or passive ventilation

Technical Specifications

Installation Guidance

• Ensure a secure connection to ducting before final mounting.
• Can be fixed with screws or sealant depending on surface.
• Not suitable for internal use.

Frequently Asked Questions (FAQ)

Q: Can I use this grill with flexible ducting?
A: Yes. It is compatible with both rigid and flexible 100mm ducting systems.

Q: Is the plastic UV resistant?
A: Yes, the grille is made from UV-stabilised plastic to resist fading and weathering.

Q: Can this grille be painted?
A: While it comes in a range of colours, it can be painted with plastic-compatible spray paint if needed.

Q: Is there a built-in insect screen?
A: This model does not include an integrated insect mesh, but mesh can be added behind the grille during installation if desired.

Warranty Information

All Manrose Fixed Grilles come with a 12-month manufacturers warranty covering defects in materials or workmanship under normal domestic conditions.