10 Best How To Stop Draft Through Extractor Fan for 2025

Kair

• 100mm / 4 inch plastic ducting connector with inline backdraught shutter / gravity damper flap.
• Stop smells and prevent cold air coming through your extract fan or ducting.
• Will fit inside 100mm round pipe or 102mm flexible hose and can be used to join multiple lengths of pipe together to form a long duct run.
• Perfectly suited for ducting your Tumble Dryer, Bathroom or Kitchen extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood and other ventilation applications.
• Genuine Kair product & covered by the Kair manufcturers 100% satisfaction guarantee for your peace of mind.

neverest

• Backdraft Nominal width 200 mm (8 inch) (exact dimensions see drawing), Galvanized steel housing, Flap leaves made of aluminum, Axis and spring made of stainless steel, Back draught valve for insertion into ventilation pipes, Reduces noise due to internal rubber seal
• The backflow flap RK opens and closes automatically. It has a smooth-running spring and should therefore be installed horizontally or vertically only as an exhaust air flap.
• The damper blades open even at low air flow. The inner sound insulation strip prevents loud rattling when striking the damper blades.
• Backflow flaps prevent the ingress of cold air or wind through the ventilation pipe. Here, the flap is installed so that the damper blades open only in the outflowing air direction. This means that no (cold) air / wind can penetrate from outside through the ventilation duct.
• INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installation of the flap so that it can open and close optimally.

neverest

• Backdraft Nominal width 125 mm (5 inch) (exact dimensions see drawing), Galvanized steel housing, Flap leaves made of aluminum, Axis and spring made of stainless steel, Back draught valve for insertion into ventilation pipes, Reduces noise due to internal rubber seal
• The backflow flap RK opens and closes automatically. It has a smooth-running spring and should therefore be installed horizontally or vertically only as an exhaust air flap.
• The damper blades open even at low air flow. The inner sound insulation strip prevents loud rattling when striking the damper blades.
• Backflow flaps prevent the ingress of cold air or wind through the ventilation pipe. Here, the flap is installed so that the damper blades open only in the outflowing air direction. This means that no (cold) air / wind can penetrate from outside through the ventilation duct.
• INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installation of the flap so that it can open and close optimally.

neverest

• Backdraft Nominal width 150 mm (6 inch) (exact dimensions see drawing), Galvanized steel housing, Flap leaves made of aluminum, Axis and spring made of stainless steel, Back draught valve for insertion into ventilation pipes, Reduces noise due to internal rubber seal
• The backflow flap RK opens and closes automatically. It has a smooth-running spring and should therefore be installed horizontally or vertically only as an exhaust air flap.
• The damper blades open even at low air flow. The inner sound insulation strip prevents loud rattling when striking the damper blades.
• Backflow flaps prevent the ingress of cold air or wind through the ventilation pipe. Here, the flap is installed so that the damper blades open only in the outflowing air direction. This means that no (cold) air / wind can penetrate from outside through the ventilation duct.
• INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installation of the flap so that it can open and close optimally.

Awenta

• Size: 150mm - size of the rounded wall hole part
• EXTERNAL SIZE 250 x 250 mm
• Ventilation cover for round ventilation systems; Material: plastic.

Airflow

• Axial recessed fan meets current building regulations
• 100mm outlet, 9.2 watts, 68mhr/19 ls ; Wall/ceiling, surface/recessed mounting
• This is a basic fan that operates from a remote switch, you need to choose a plug in module for additional functionality
• This fan is idealy suited to a ensuite, cloakroom or small bathroom
• Silent open and closing delayed iris shutter, you can purchase additional coloured covers to match your decor. Ductable for short runs

neverest

• Backdraft Nominal width 100 mm (4 inch) (exact dimensions see drawing), Galvanized steel housing, Flap leaves made of aluminum, Axis and spring made of stainless steel, Back draught valve for insertion into ventilation pipes, Reduces noise due to internal rubber seal
• The backflow flap RK opens and closes automatically. It has a smooth-running spring and should therefore be installed horizontally or vertically only as an exhaust air flap.
• The damper blades open even at low air flow. The inner sound insulation strip prevents loud rattling when striking the damper blades.
• Backflow flaps prevent the ingress of cold air or wind through the ventilation pipe. Here, the flap is installed so that the damper blades open only in the outflowing air direction. This means that no (cold) air / wind can penetrate from outside through the ventilation duct.
• INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installation of the flap so that it can open and close optimally.

OOPPEN

• ★ Protection class: IP34; Voltage/frequency: 220~240/50Hz, Power: 22W, Airflow: 201m3/h, Speed: 2350RPM.
• ★ Ball bearing motor running more stably and quietly.
• ★ Modern design and good looking. ABS front panel, Quiet operation, Back Draught Shutter.
• ★ The extractor fan is adopted quality ABS plastic material, not easy to be deformed, good workmanship and durable to use.
• ★ Durable, build-in copper motor with thermal protection, can work continuously without maintenance.

Manrose

• Quiet Operation at 27dB. Note: Product is tested in an anechoic chamber to a recognized standard.
• Timer over run, backdraught shutter
• Unique turning vane technology

Blauberg

• Plastic ducting air Inlet/ air outlet with Gravity shutters - 4 inch/ 100mm round male spigot on the back of the grille for indoor or outdoor use. Designed to terminate your extract duct to an external wall.
• Non-return shutter flaps close automatically When not in use. Stops unpleasant odours, noises, or draughts flowing back through your duct. Gravity flap - no need for springs that could break. Gravity operated flaps that close when Not in use.
• Easy to install, just push-fit duct and fittings together. Perfectly suited bathroom or kitchen extractor fan, hydroponics fan, or in-line extract fan.
• This grille can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive ventilation, positive Input, air conditioning, HVAC, and heat recovery systems.
• Suitable to use in compliance with part F building regulations.