10 Best Backdraft Shutter 150mm for 2025

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.

Kair

• Stainless steel external vent with 145mm spigot for use with 150mm ducting systems
• Superior alternative to plastic cowls and grilles with integral back draft shutter for protection against insects and unwanted sounds
• Ideal for both domestic and commercial extract applications.
• Contains a weatherproof seal to eliminate leaks and drafts.
• Ideal for venting tumble dryer, bathroom fans, air conditioning units, kitchen fans, electric dryers or cooker hoods.

Awenta

• Material: PVC plastic
• Colour: white
• Diameter: 100mm

Europlast

• Ø 150mm / 6 inch Non-return Valve for Extractor Fans
• Backdraft Shutter
• Non-return valves ensure that the air flows in one direction only
• Simple operation works and silent unlike spring loaded vent valves
• Made in EU

Klimapartner

• Back draught flap for insertion into ventilation pipe DN 150 (5 inch)The backflow damper RKI opens and closes automatically. It has a strong spring and can be installed either horizontally or vertically. The flap is suitable for retrofitting, since it is completely inside the duct.
• A good sealing and fastening of the duct is achieved by the foam strip attached to the outside of the damper.The rubber sheath applied to the damper prevents loud rattling when the flap blades are opened. The housing of the flap is made of galvanized steel, the flap blades are made of aluminum, the axle and spring are made of stainless steel
• Designed for use in AC, dryers, exhaust, extractor or range hoods, Heating, Vent and other residential, commercial and industrial HVAC applications
• FUNCTIONALITY: Backflow dampers prevent cold air or wind from entering the ventilation pipe. In this case, the flap is installed in such a way that the flap leaves only open into the outgoing air direction. This means that no (cold) air / wind can penetrate the ventilation pipe from the outside.
• INSTALLATION; The backflow valve is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation.

Awenta

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

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.

Blauberg UK

• Designed to provide anti back draught in a duct when our fan has been switched off.
• A spring loaded butterfly action shutter acts as a barrier when there is no airflow.
• Can be fitted in any position in circular ducts.
• Also known as non return valves.

Awenta

• Material: PVC plastic
• Colour: white
• Diameter: 150mm

VENTS

• Will reduce heat loss when room is not being extracted
• Prevent animals entering through the ducting
• Can be fitted Verticaly or Horizontaly
• Reduce noise's and smells from entering through ducting