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Manrose

Manrose Back Draught Shutter 4"/100mm

Manrose Back Draught Shutter 4"/100mm

473107
€5,95 EUR
€5,95 EUR
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🚚 Delivery Information

We offer reliable delivery across the UK using trusted national couriers.

All delivery times are estimates and begin once your order has been dispatched. Orders are dispatched from the UK.

✅ Free UK Mainland Delivery

Free delivery is available on orders over £100 within the UK mainland, excluding certain large, heavy, or fragile items.

Free delivery does not apply to:

  • Oversized items (over 1m in length)
  • Heavy items (including aggregates, compost, and logs)
  • Fragile items (such as ceramics and shower enclosures)

These items may incur a delivery charge due to specialist handling requirements.

🇬🇧 Standard Delivery – UK Mainland

(Excludes Northern Ireland)

Estimated delivery: 7–10 working days

Item WeightCostUnder 1kg£4 (Free over £100)1–10kg£7 (Free over £100)10–30kg£15 (Free over £350)30kg+ (Bulky)£35 (Minimum order £100)

🌍 Northern Ireland, Scottish Highlands & Islands

Estimated delivery: 7–10 working days

Item WeightCostUnder 1kg£71–10kg£1510–30kg£2530kg+ (Bulky)£35 (Minimum order £100)

📦 Additional Information

  • Delivery costs are calculated at checkout
  • Orders are shipped using trusted UK couriers
  • Tracking information is provided once your order is dispatched
  • Delivery times may vary during peak periods

If you have any questions about delivery, please contact us before placing your order.

❓ Frequently Asked Questions

Q: Can I choose a delivery date?
A: At present, we are unable to offer timed or date-specific delivery.

Q: What happens if my item arrives damaged?
A: Please contact us within 48 hours of delivery and we’ll resolve the issue promptly.

Returns

Read our returns and refund policy

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The Manrose 100mm (4") In-Line Backdraught Shutter is an essential addition to any ventilation system that helps maintain indoor comfort and energy efficiency. Installed within a ducting run, this device prevents unwanted cold air, odours, and debris from re-entering the building when your ventilation fan is not in operation.

Crafted from lightweight and durable PVC, this in-line shutter is designed for quick and easy integration with existing 100mm round ducting. Whether for domestic kitchens, bathrooms, utility rooms, or commercial installations, it ensures a more controlled and hygienic air environment.

Key Features

  • Prevents Air Backflow
    Automatically closes when airflow stops, blocking drafts and external air from re-entering the property.
  • Energy-Efficient
    Helps maintain indoor temperatures and reduces heat loss, supporting more efficient heating and cooling.
  • Low-Resistance Design
    Opens with minimal airflow resistance, ensuring that fan performance is not compromised.
  • Lightweight & Durable
    Constructed from white PVC, offering reliable operation with resistance to corrosion and wear.
  • Universal Fit
    Compatible with most 100mm (4") round ducting systems, including flexible and rigid ductwork.

Technical Specifications

Attribute Specification
Product Type In-Line Backdraught Shutter
Duct Compatibility 100mm (4") Round Ducting
Material PVC
Operating Mechanism Gravity-operated flaps
Installation Inline – fits between duct runs
Weight (Boxed) 60g

Applications

  • Bathroom extract fans
  • Kitchen ventilation systems
  • Utility rooms
  • Inline fan ducting systems
  • HVAC systems in both residential and commercial settings

Installation Notes

  • Install the shutter with the arrow pointing in the direction of airflow.
  • Ensure the unit is level to allow gravity flaps to close properly.
  • Suitable for horizontal or vertical duct runs.
  • Can be used in conjunction with extractor fans and inline fans.

Frequently Asked Questions (FAQ)

Q: Does this shutter work with both rigid and flexible ducting?
A: Yes, it can be installed with either type, as long as the ducting has a 100mm internal diameter.

Q: Will this affect fan performance?
A: No, the flaps are designed to open with minimal airflow resistance, so your fan will operate efficiently.

Q: Is this suitable for external wall mounting?
A: It is intended for use within the ducting run. For external terminals, a grille with integral shutters is recommended.

Warranty Information

All Manrose products, including this in-line backdraught shutter, are covered by a 1-year manufacturer’s warranty against material or manufacturing defects under normal usage and installation conditions.