10 Best Backdraft Damper of December 2025

• An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.
• Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts.
• Mounts horizontally or vertically to prevent backflow and debris from entering ducting.
• Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow.
• Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat

AC Infinity

• EFFICIENT DUCTING TOOL: This airflow regulating backdraft blocker is designed to improve ventilation by releasing contaminated air out through flaps that close automatically to prevent outdoor air from sweeping back in.
• GALVANIZED STEEL COLLARS: This 6 Inch backdraft air damper is composed of an enduring material that does not corrode or rust and features lightweight aluminum damper blades that are designed to open outwards with air pressure and close with gravity.
• STRESS-FREE SETUP: Prevent backdrafts through these HVAC dampers, which can easily be installed vertically or horizontally due to its shock absorbing PVC foam seal that also prevents the flaps from rattling.
• RELIABLE AND CONSISTENT: With over 60 years of experience, Soler & Palau’s commendable and steady growth is due to their philosophy of developing air-moving products specifically tailored to their consumer’s needs.
• RELIABLE AND CONSISTENT: With over 60 years of experience, Soler & Palau’s commendable and steady growth is due to their philosophy of developing air-moving products specifically tailored to their consumer’s needs

Soler & Palau

• An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.
• Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts.
• Mounts horizontally or vertically to prevent backflow and debris from entering ducting.
• Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow.
• Fit for 8 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat

AC Infinity

• 4 inch duct damper opens and closes AUTOMATICALLY, PREVENTING unwanted drafts and the duct valve for 4 inch ducting can be installed horizontally or vertically. Not for use in plastic ducts.
• 4 inch damper housing is made of GALVANIZED STEEL and the dryer vent valve flaps are made of aluminium the butterfly damper axis and spring are made of stainless steel. PROFESSIONAL long life QUALITY is what the klimapartner brand stands for!
• Backflow damper exhaust fan shutters are DESIGNED for use in AC units, installation in dryer ducts, bathrooms, STOPPING INFLOW OF AIR from range hoods and heating systems and prevent cold or warm air from entering back into the duct.
• Bathroom vent draft blocker or exhaust fan shutter is INSTALLED by pushing the hvac damper into the duct, blades open away from exhaust air. The spring needs at least 15 Pa to open correctly.
• Opposing blade damper 4 backdraft should be interested behind the bathroom fan or inline fan. This will help weaker booster fans to push open the 4 inch backflow preventer dampener.

Klimapartner

• Item: Backdraft Damper / Wall Shutter
• Fits Fan Dia.: 12"
• Shutter Overall Size: 15" x 15"
• Shutter Construction Material: G-90 Galvanized Steel Frame and Tie Rods
• Shutter Opening Required: 12-1/2" x 12-1/2"

CAI - DAYTON

• Highest Rated Premium Airflow Control Backdraft Dampers
• Spring-loaded butterfly aluminum damper blades encased in a 20-guage galvanized steel housing
• May be installed in any position or orientation to prevent backflow and designed for use in AC, Heating, Vent and other HVAC application temperatures from -22 to 180 degrees F (Fahrenheit)
• Extremely easy and secure inline duct insertion installation. Available in 4", 5", 6", 7", 8", 10", 12", 14" and 16".
• Minimal pressure to open. 0.04 to 0.08 in. w.g. Maximum automatic back flow protection

ALDES

• ✅ Excellent quality back draft dampers
• ✅ Manufactured of heavy-gauge galvanized steel with heavy duty springs // Spring loaded for positive closure
• ✅ Backdraft dampers with galvanized steel collar and lightweight aluminum damper blades
• ✅ They prevent back draft air when your fans are off
• ✅ Ideal for use with intake or exhaust duct systems

Ozo Brothers

• The backflow damper prevents the ingress of cold or warm air and wind from entering through the ventilation duct. The 4 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, 3.5 inches deep and can withstand temperatures from 14 to 140 °F
• Designed for use in air conditioners (AC), dryers, exhaust, extractor or range hoods, heating ducts, vents and other HVAC applications
• The backflow flap opens and closes automatically at low air volumes. It has a smooth-running spring and an internal foam strip to keep the blades from rattling and can be installed horizontally or vertically
• 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 installations so that it can open and close optimally. The Backdraft shutter is installed so that the damper blades open only in the outflowing air direction.
• Back draught valves can be inserted into ventilation ducts which are flexible or non flexible. Cannot be used with plastic ducts as the sizes are different.

neverest

• An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications.
• Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts.
• Mounts horizontally or vertically to prevent backflow and debris from entering ducting.
• Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow.
• Fit for 6 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat

AC Infinity

• Back-flow valve with 2 spring-loaded wings prevents the reverse airflow movement when the ventilation system is turned off
• The valve wings open under the pressure created by the airflow and then automatically close with the spring work
• The valve casing is made of galvanized steel and the wings are made of sheet aluminium
• The valve is equipped with a special foam rubber filler reducing the noise level during its operation and ensuring the integrity of the system
• Fit for 4" Duct Openings . An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications