Home ventilation accessory designed to stop draughts and household smells coming back through ducting. Homeowners and installers gain a quick retrofit that reduces cold air infiltration and unpleasant odours. Is the Kair Connector with Backdraught Shutter the right fit for existing 100mm pipe or flexible hose installations?
⚡ At a Glance
- • Backdraught Control: Gravity-operated flap opens at low fan speeds and closes to block reverse flow
- • Best for: Tumble dryers, bathroom and kitchen extractor fans, hydroponics, inline extract fans and cooker hoods
- • Not ideal for: Duct systems that do not use 100mm round pipe or 102mm flexible hose
Plastic inline 100mm backdraught shutter uses a gravity flap to prevent reverse airflow. Fits inside 100mm round pipe or 102mm flexible hose and can join multiple duct lengths.
Stop draughts and smells - with a gravity damper flap
Inline plastic backdraught shutter contains a gravity-operated flap that sits closed at rest and swings open when airflow is drawn by an extractor. No spring mechanism is required, so the flap responds to modest pressure differences.
Cold air and odours are kept out when fans are off, improving comfort and preventing unwanted smells from re-entering rooms.
Simple retrofit and pipe joining - with a 100mm connector design
Connector is sized to insert inside 100mm round pipe and to accept 102mm flexible hose, enabling direct joins between sections of ducting. The shape allows multiple lengths to be connected to form longer runs.
Quick to fit into existing systems, useful for extending duct runs or replacing a damaged section without replacing whole lengths of ducting.
Reliable operation at low fan speeds - with a lightweight gravity flap
Gravity flap construction opens easily under low-pressure differentials produced by quieter extract fans, as noted by user feedback that no spring is needed. The plastic pivot and flap design keeps movement smooth.
Works with lower-power fans and quiet inline extractors, so ventilation remains effective even on reduced settings.
✨ The 4 Key Reasons for Kair Connector with Backdraught Shutter
- Plastic connector construction – Easy to handle and lightweight for installation in tight spaces
- Ready-fit 100mm connection – Inserts cleanly into 100mm pipe and 102mm flexible hose
- Joins multiple duct lengths – Simplifies extending duct runs without custom connectors or extra fittings
- Clear retrofit dimensions – Simple to measure and fit into existing ventilation systems
📋 Technical Details at a Glance
- Category: Home ventilation connector with backdraught shutter
- Fit size: 100mm / 4 inch (fits inside 100mm round pipe)
- Flexible hose compatibility: Fits 102mm flexible hose
- Material: Plastic
- Damper type: Gravity-operated backdraught flap
❓ Frequently Asked Questions
Q: Will this fit standard 100mm ducting?
A: Yes. The connector is designed to fit inside 100mm round pipe and also accepts 102mm flexible hose.
Q: Can it be used with a tumble dryer or kitchen extractor?
A: Yes. Product descriptions list tumble dryers, bathroom and kitchen extractor fans, hydroponics, in-line extract fans and cooker hoods as suitable applications.
Q: Does the flap need a spring or power to operate?
A: No. The gravity-operated flap opens easily at low fan speeds and does not require a spring or external power.
🏆 Our Verdict
The Kair Connector with Backdraught Shutter suits homeowners and installers who need a straightforward solution to stop draughts and smells in 100mm duct systems. Gravity flap action and an insert-fit 100mm design make it a simple retrofit for tumble dryers and extractor fans. Simple construction and compatibility with standard Kair ducting promise low maintenance and practical energy savings over time.
