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Perfect for heating ventilation & air conditioning HVAC, Grow Rooms, Grow Tents, Greenhouses, Air Conditioner, Kitchens, Dryer, Bathrooms, etc. Inner diameter: 155mm / 6. 2inch. Length can be extended up to 3 meters.
All 6-inch compatibility: compatible all 6-inch / oil / 150mm duct, topside of range hood, please check the size of your duct before purchase. Thermal endurance: Temperature range from -22 to 266 Fahrenheit. Wrapped edge: upgrade version with two ends wrapped, more safety to install to avoid scratch hands and device. No clamps included in this link. Flexible to expand and stay strong as a clothes dryer transition duct, flange system cleaner, ventilation tent air blower, etc.

It requires 2 people with 2 hands grabbing more edge area to fully expand the duct. Make sure to expand the duct slowly to prevent the duct from pulling apart due to using too much force. Lock seams- made with noncombustible corrugated aluminum continuous lock seams to keep the duct in place which allows for easy installation.

Wide application range: it can be applied to air conditioners, range hoods, bathroom exhaust vents, dryers and other HVAC applications. Replaceable: this product is not a disposable product.
High quality: metallic backdraft damper duct is more sturdy and durable. After you use it for a long time, you can replace some of the used parts without spending too much money to make your backdraft damper look brand-new.

Good sealingthe back flow damper prevents the ingress of cold/warm air wind/rats from entering through the ventilation duct, which prevent back draft air when fans are off. Clip-on designthe backflow flap is installed by inserting it into the ventilation pipe until it stops.





Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally.
Material: the 6 inch backdraft damper is made out of a galvanized steel, the flap leaves are made of aluminum, while the Axis and spring are made of stainless steel and can withstand temperatures from 14 to 140 °F. Keep away from rattling: it has an internal foam strip and a smooth-running spring to keep the valve wings from rattling.

Multiple usagesthe draft blocker is designed for use in ac, vents and other residential, heating systems, fans, dryer vent, extractor or range hoods, exhaust, commercial and industrial HVAC applications.
The back draft damper can be inserted into a flexible or non-flexible ventilation duct. Practical featuresthe air duct choke prevents cold air or wind from entering the ventilation duct. The valve is equipped with a smooth-running spring and a rubber gasket that create an airtight seal and grip between the damper and ducts. Plastic pipes are of different sizes and cannot be used with plastic pipes.
1. FanGoFast
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150mm 2-Layer Silver Aluminum Foil Air Duct Flex Duct Hose for Range Hood, Grow Room D-6", L-3m, 6inch 9.8ft Dryer Exhaust Hose
#adFanGoFast #ad - Multifunctional duct: the flexible air duct tube adopts 2-layer aluminum foil to wrap the steel spring. It is 30% more than the ordinary hose skeleton to meet more angle changes and smaller compression volume. High performance: the aluminum material is resistant to high temperature and water drops.Perfect for heating ventilation & air conditioning HVAC, Grow Rooms, Grow Tents, Greenhouses, Air Conditioner, Kitchens, Dryer, Bathrooms, etc. Inner diameter: 155mm / 6. 2inch. Length can be extended up to 3 meters.
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Commonly used in air / steam ventilation & exhausting of dryer exhausting outlet, work bench, HVAC system, barbecue grill, growing system, etc. Flexible & bendable: any angles & corners is available with the air duct. All 6-inch compatibility: compatible all 6-inch / oil / 150mm duct, topside of range hood, please check the size of your duct before purchase. Thermal endurance: Temperature range from -22 to 266 Fahrenheit. Wrapped edge: upgrade version with two ends wrapped, more safety to install to avoid scratch hands and device. No clamps included in this link. Flexible to expand and stay strong as a clothes dryer transition duct, flange system cleaner, ventilation tent air blower, etc.
Brand | FanGoFast #ad |
Manufacturer | FanGoFast #ad |
More information #ad
2. Awoco
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Ideal for Kitchen, Bathroom, Range Hood Venting 8 Inch, Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct
#adAwoco #ad - General purpose venting- non insulated general purpose venting duct for low & medium operating pressures is ideal for kitchen, bathroom, and range hood venting.It requires 2 people with 2 hands grabbing more edge area to fully expand the duct. Make sure to expand the duct slowly to prevent the duct from pulling apart due to using too much force. Lock seams- made with noncombustible corrugated aluminum continuous lock seams to keep the duct in place which allows for easy installation.
More information #ad
Flexible- semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. Dimensions- diameter 8 inches, Maximum Expanded Length 6 feet. Perfect for awoco range hoods- fit awoco 8” top vent range hoods perfectly.Brand | Awoco #ad |
Manufacturer | Awoco #ad |
Part Number | Awoco-RH-SP |
More information #ad
3. Swess
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6" Backdraft Damper Duct,One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades,Compatible with Air Conditioners, Range Hoods and Exhaust Fans
#adSwess #ad - The one-way airflow ducting insert with spring-Loaded Folding Blades perfectly matches the foam strip in the inner ring, which can reasonably control the metal windshield to release and block airflow. Product contains:1pc 6 inch Backdraft Damper.Wide application range: it can be applied to air conditioners, range hoods, bathroom exhaust vents, dryers and other HVAC applications. Replaceable: this product is not a disposable product.
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Easy to install: insert the check valve into the vent pipe, insert two wind-proof pieces and the spring insertion hole at the same time during the insertion process, all parts are combined It should be parallel to the ground, there is a small metal piece on the outside of the two ends of the check valve to fix the check valve from falling off, so that the backdraft damper can be opened and closed. High quality: metallic backdraft damper duct is more sturdy and durable. After you use it for a long time, you can replace some of the used parts without spending too much money to make your backdraft damper look brand-new.
Brand | Swess #ad |
Manufacturer | Swess #ad |
More information #ad
4. LANIAKEA
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Stainless Steel Backflow Preventer for 6" Range Hoods Ducting Hose Kitchen Bathroom Exhaust Fans, LANIAKEA 6 Inch Backdraft Damper with 2 PCS Ducting Hose Clamps
#adLANIAKEA #ad - Wide usesdesigned for use in air conditioners AC, exhaust, heating ducts, dryers, extractor or range hoods, vents and other HVAC applications.Good sealingthe back flow damper prevents the ingress of cold/warm air wind/rats from entering through the ventilation duct, which prevent back draft air when fans are off. Clip-on designthe backflow flap is installed by inserting it into the ventilation pipe until it stops.
More information #ad
High qualitythe 6 inch dryer vent Draft Blocker is made out of a stainless steel, durable, rust resistant andfire prevention. Easy to installpackage comes with 2 pcs 6 inch ducting hose clamps which will help you install damper easier.Brand | LANIAKEA #ad |
Manufacturer | LANIAKEA #ad |
More information #ad
5. AC Infinity
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AC Infinity 6" Ducting Take-Off Collar, Galvanized Steel Inlet Flange Starter Collar for 6” Ducting with Dryers and Range Hoods
#adAC Infinity #ad - Ducting opening diameter: 6 inches | Collar Diameter: 8 inches | Finish: Zinc Coating. Galvanized steel body that is corrosion-resistant and can withstand high temperatures. A steel ducting flange designed for such uses like tumble dryers, bathroom fans, and range hoods.More information #ad
Flat brim that lays flush against all flat surfaces and creates an airtight seal to keep particles out. Crimped rims and raised lip on the duct opening for enhanced grip on ducting.Brand | AC Infinity #ad |
Manufacturer | AC Infinity #ad |
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6. AC Infinity
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One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 6” Ducting in Range Hoods and Bathrooms Fans, AC Infinity 6" Backdraft Damper
#adAC Infinity #ad - Mounts horizontally or vertically to prevent backflow and debris from entering ducting. An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.More information #ad
Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Fit for 6 in. Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. Duct openings | product Length: 5. 03 inches | Finish: Powder Coat.Brand | AC Infinity #ad |
Manufacturer | AC Infinity #ad |
More information #ad
7. AC Infinity
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One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 8” Ducting in Range Hoods and Bathrooms Fans, AC Infinity 8” Backdraft Damper
#adAC Infinity #ad - Duct openings | product Length: 5. 03 inches | Finish: Powder Coat. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.More information #ad
Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. Fit for 8 in. Mounts horizontally or vertically to prevent backflow and debris from entering ducting.Brand | AC Infinity #ad |
Manufacturer | AC Infinity #ad |
More information #ad
8. Broan
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Broan/Nutone 412H Round Transition Duct for Range Hoods and Bath Ventilation Fans, 7
#adBroan #ad - Picture appears to show it being offset but it is not. 3-1/4" x 10" to 7" round transition made to fit fan and hood outlets that must fit to 7" round ducting.More information #ad
Transition is made of 30 gauge galvanized steel construction for durability and long life. For range hoods and bath ventilation fans. Please note: item is not offset - it is centered.Brand | Broan #ad |
Manufacturer | Broan #ad |
Height | 7 Inches |
Length | 8 Inches |
Weight | 1 Pounds |
Width | 10.25 Inches |
Part Number | 412H |
Model | 412H |
More information #ad
9. iPower
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For HVAC Extractor Fan Vent, 6", One-Way Airflow Ducting Insert Backflow Preventer with 2 Inline Springs Loaded Folding Blades, iPower 6 inch Backdraft Shutter Damper Back Draft Blocker, Range Hoods
#adiPower #ad - One-way airflow ducting insert: back-flow valve with 2 spring-loaded wings prevents the reverse airflow movement through the ventilation duct when the ventilation system is turned off. The backdraft shutter is installed so that the damper blades open only in the outflowing air direction.Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally.
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The backflow flap closes automatically at low air volumes. Essential for HVAC ventilation. Wide applications: back draught valves can be inserted into ventilation ducts which are flexible or non-flexible. Lightweight valve wings: the valve wings open under the pressure created by the airflow and then automatically close with the spring work. Material: the 6 inch backdraft damper is made out of a galvanized steel, the flap leaves are made of aluminum, while the Axis and spring are made of stainless steel and can withstand temperatures from 14 to 140 °F. Keep away from rattling: it has an internal foam strip and a smooth-running spring to keep the valve wings from rattling.
Brand | iPower #ad |
Manufacturer | iPower #ad |
Height | 6.3 Inches |
Length | 6.9 Inches |
Width | 6.9 Inches |
Part Number | GLDUCTDAMPER6 |
Model | 6 inch Backdraft Shutter Damper Back |
More information #ad
10. Miuwauer
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Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector, 8 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker
#adMiuwauer #ad - Same for vertical installation. The backflow flap opens and closes automatically at low air volumes. This also applies to vertical installation. Easy installation the backflow prevention valve is installed by pushing it into the ventilation duct to make it as mobile as possible. When the valve flap is installed horizontally, the position of the spring should be horizontal so that the valve flap can be opened and closed optimally.Multiple usagesthe draft blocker is designed for use in ac, vents and other residential, heating systems, fans, dryer vent, extractor or range hoods, exhaust, commercial and industrial HVAC applications.
More information #ad
Quality materialthe backdraft damper is made of galvanized steel, and the axis and spring are made of stainless steel, the flap leaves are made of aluminu, which can withstand temperatures up to 50°C. Needs attention this airflow regulating backdraft shutter is installed on the TD lip to improve ventilation by preventing air circulation when the fan is not in use. The back draft damper can be inserted into a flexible or non-flexible ventilation duct. Practical featuresthe air duct choke prevents cold air or wind from entering the ventilation duct. The valve is equipped with a smooth-running spring and a rubber gasket that create an airtight seal and grip between the damper and ducts. Plastic pipes are of different sizes and cannot be used with plastic pipes.
Brand | Miuwauer #ad |
Manufacturer | Miuwauer #ad |
More information #ad