100mm (4 Inch) Gravity Shutter Black | External Vent Cover for Extractor Fan Ducting Knightsbridge EX007B
£3.50
Ex. VAT
(over £100+VAT, applies to zone A only , £6 +VAT otherwise)
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This is the 100mm (4 Inch) Gravity Shutter Black | External Vent Cover for Extractor Fan Ducting Knightsbridge EX007B available at SparksDirect.co.uk for the best price. The Knightsbridge EX007B is a 100mm (4 inch) gravity shutter vent designed for use with domestic and commercial extractor fan installations. Finished in black, it is installed on the external wall over 100mm round ducting to provide a neat appearance while protecting the ventilation system from unwanted backdraughts, rain ingress and pests. The gravity-operated flaps automatically open when the extractor fan is running and close when airflow stops, helping to improve energy efficiency and prevent cold air entering the building.
Suitable for use with 100mm axial and centrifugal extractor fans, the EX007B is compatible with both rigid and flexible 100mm ducting. It is commonly installed in bathrooms, toilets, kitchens, utility rooms and other ventilation systems where an external duct termination is required. Manufactured by Knightsbridge (ML Accessories), this durable gravity shutter offers a simple and effective finishing solution for new ventilation installations and replacement projects.
Features & Benefits
- External gravity shutter for 100mm (4") ventilation systems
- Attractive black finish
- Compatible with 100mm round rigid or flexible ducting
- Prevents cold air backdraughts
- Helps stop rain entering the duct
- Reduces the risk of insects, leaves and small vermin entering the ventilation system
- Gravity-operated flaps open automatically when the fan is running
- No electrical connection required
- Quick and straightforward installation
- Suitable for domestic and commercial extractor fan installations
- Ideal for new installations or replacement vent covers
Technical Specifications
- Manufacturer: Knightsbridge (ML Accessories)
- Model: EX007B
- Product Type: Gravity Shutter
- Colour: Black
- Duct Size: 100mm (4")
- Mounting Location: External wall
- Compatible Ducting: 100mm rigid or flexible round duct
- Operation: Gravity-operated flaps
- Application: Extractor fan ventilation
- Suitable For:
Bathroom extractor fans
Kitchen extractor fans
Utility room ventilation
WC extractor fans - Protection:
Reduces backdraughts
Helps prevent rain ingress
Discourages insects and small pests entering ductwork - Approximate Height: 152mm
- Installation: Surface mounted over duct outlet
- Manufacturer's Warranty: 1 Year
Frequently Asked Questions
What is the Knightsbridge EX007B used for?
The EX007B is fitted to the outside of a building over a 100mm extractor fan duct. It allows air to escape while automatically closing when the fan is switched off, helping prevent cold air, rain and pests entering the ductwork.
Will it fit any 100mm extractor fan?
Yes. It is designed for use with standard 100mm (4 inch) round ducting, making it compatible with most domestic and commercial 100mm extractor fans that use rigid or flexible ducting.
Does the gravity shutter require wiring?
No. The shutter is completely mechanical. The flaps open automatically when airflow from the extractor fan pushes them open and close again under their own weight when the airflow stops.
Who Needs This Product?
The Knightsbridge EX007B is suitable for:
- Qualified electricians
- Ventilation installers
- HVAC engineers
- Bathroom installers
- Kitchen fitters
- Property developers
- Maintenance contractors
- Facilities management teams
- Competent DIY users replacing an existing vent cover (where no electrical work is involved)
What Is This Used For?
The Knightsbridge EX007B is designed to provide a professional external termination for 100mm extractor fan ducting while protecting the ventilation system from external elements.
Typical applications include:
- Bathroom extractor fans
- Ensuite ventilation
- WC extractor fans
- Kitchen extract ventilation
- Utility room ventilation
- Domestic ventilation systems
- Commercial washrooms
- Office ventilation
- Small commercial kitchens
- Replacement external vent covers
Three Reasons Installers Recommend This
- Improves ventilation efficiency by helping prevent cold air from flowing back through the duct when the extractor fan is switched off.
- Protects the ducting from rain, insects and small vermin, helping keep ventilation systems clean and functioning efficiently.
- Simple, reliable design with gravity-operated flaps requiring no electrical connection or maintenance, making installation quick and straightforward.
About Knightsbridge
Knightsbridge, part of ML Accessories, is one of the UK's leading manufacturers of electrical wiring accessories, lighting, ventilation and installation products. The brand is trusted by electricians, contractors and developers for delivering reliable, high-quality products that comply with UK standards. Its comprehensive range includes extractor fans, ventilation accessories, switches, sockets, lighting and electrical installation products for domestic, commercial and industrial applications.
About the Knightsbridge Ventilation Accessories Range
The Knightsbridge Ventilation Accessories range includes ducting, grilles, gravity shutters, fixed louvre vents, connectors and installation accessories designed to complement extractor fan systems. Suitable for bathrooms, kitchens, utility rooms and commercial buildings, the range provides everything required to create efficient ventilation systems while protecting ductwork from weather, backdraughts and debris. Manufactured for compatibility with standard UK duct sizes, these accessories help installers achieve reliable, professional and long-lasting ventilation installations.
| Technical Features | |
| Colour | black |
| Ducting | 100mm |
Note: Some images and pictures are for reference only. The item may differ from the image/picture due to manufacturer's change. Should you require the exact item in the picture, please call or email us to enquire.
Shipping
Sparks Direct delivers via courier to the UK only; the standard delivery charge is £6 + VAT for all orders under £100 + VAT. If your order is over £120, you get free delivery (unless there's a special delivery charge for the items you wish to order or you're in shipping zone C or D). Full details for shipping charges can be found via Terms and Conditions.
If the items you order are in stock and the order is placed before 1.00pm, delivery can be made within 1-2 working days. If the items are not in stock, we will inform you via email how long it will take or ask for your confirmation if there's a long lead time.
Returns
We offer 30-day returns for unwanted items - please email us to request a returns number which will need to be quoted when the items are returned. For faulty items or items damaged in transit, please advise via email, and an appropriate returns number will be provided. Full details concerning returns and refunds can be found via our Terms and Conditions.
