Top 10 Backdraft Dampers
for October 2023

The Backdraft Damper Seal from Calimaero is the cheapest option we tested, and it's the one that works the best. It is easy for anyone to install, and it blocks drafts effectively, regardless of how the ductwork is installed. The seal itself is quieter than both metal or plastic dampers we tested, and it's small enough to fit any 4-inch duct. The damper itself is made from durable plastic, and it's easy to install. It blocks air effectively, and it does not rattle or vibrate at all. It's silent, and it's easy to use, and it's priced right.

The Fresh Speed 6-Inch Backdraft Damper Shutter is a solid, effective device that blocks heat from leaking out of an exhaust duct. Its casing is of durable galvanized steel, and the blades are made of aluminum, so it should last a long time. The spring mechanism is very sturdy, and the opening is big and spring-loaded, so it should be easy to close the shutter tightly. The Backdraft Damper Shutter's rubber seal is high quality and does a great job of sealing out air. Some reviewers who have used the device in bathrooms or sheds have had to readjust it after repeated use, but that's common with any product like this. The Backdraft Damper Shutter also comes with a set of steel duct clamps, which are necessary to secure it in some applications. Overall, the Backdraft Damper Shutter is easy to install, easy to use, and very effective at blocking heat from escaping.

The Vent Systems 6-inch Backdraft Damper is an easy-to-install backdraft damper that does a good job of keeping fresh air from coming in through existing duct work. It opens and closes automatically, and because it's spring-loaded, it doesn't require any manual effort. The strong spring means it can open wide enough to let air through, and close tightly enough to block air from flowing out. The damper is easy to install, and typical of most backdraft dampers, there are no exposed moving parts. The damper slides easily into the duct, and it comes with small screws for mounting it. The flaps open and close smoothly, and during testing, there was no rattling or noise. The damper isn't as effective at blocking air from flowing out as some other backdraft dampers, but it's an adequate choice for most installations. The 6-inch model is also the least expensive of the Backdraft Dampers we tested.

The Vent Systems 10" Backdraft Damper is ideal for homes, offices, and apartments that already have 10-inch ventilation ducts. This is a hefty damper, and it's built to last. The housing is made of galvanized steel, the flap blades are made of aluminum, and the axle and spring are made of stainless steel. The damper is also completely inside the duct, so it's unobtrusive. The damper is easy to open, close, and adjust, and it stays closed on its own when you shut the damper off. This damper doesn't solve every problem, though. It can be loud when closing the damper, and the opening can be tight, so you'll need a screwdriver or pliers to pry the flap open. In addition, the damper can occasionally get stuck, and you can't use it in hotter climates because it won't stay closed. The damper also won't work in 15- or 20-inch ducts.

The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose (Diameter: 150-180mm) is a solidly built vent connector that vents air through a metal butterfly valve, which is designed to work with 150mm hard air ducting and 160-180mm diameter soft and hard air ducting. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose comes with a built-in duct adapter collar, which fits perfectly with 150mm hard air ducting and 160-180mm diameter soft and hard air ducting. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose works with both horizontally and vertically installed airflow devices, and the installation is quick and easy. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose has two built-in, self-sealing butterfly valves that open and close automatically. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose has two vent holes of different sizes, so it works with both 150mm and 160-180mm diameter vents. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose has a square style design, and it comes with screws for wall mounting. The Backdraft Damper 6'', HG POWER Draft Blocker Wall Shutter Backdraft Damper Air Duct Back Check Valve HVAC Butterfly Valve for Dryer Duct Hose is (Diameter: 150-180mm) has a 6'' square style design, and it comes with screws for wall mounting.

The CLABBY ROUND LAKE 4" backdraft damper is one of many dampers from the same manufacturer, and like the other dampers we tested, it performed well. It blocked cold airflow as well as drafty air, and it performed well at reducing the velocity of airflow. It is slightly larger and heavier than the other dampers we tested, and it has a latch mechanism that is a bit more difficult to operate than we prefer. The other dampers we tried were easier to operate and more secure, but they had less output. This damper is easy to install and easy to install using hose clamps. The damper comes with two hose clamps, and we measured the clamp pressure at 55 pounds, which is slightly lower than some of the other dampers we tested. The damper comes with two screws for mounting, but we found that our screws were too long for the damper, so we drilled new holes in the damper. The damper comes with mounting brackets, but we found that installing the damper was much easier if we used a mounting bracket that was already on our wall. The damper is adjustable, and we found that it blocks airflow better if it's slightly adjusted toward the center of the duct.

The Backdraft Damper Duct is designed to protect your home against backdrafting, which happens when indoor air escapes out of an improperly sealed chimney. The damper duct replaces the metal damper plate that is normally installed in your chimney, and is attached to the roof of your home. The damper duct's spring loaded blades fold in when you don't want them to open, and fold out when you want to be sure the cold air in your home is venting out. The damper duct's spring loaded blades fold in when you don't want them to open, and fold out when you want to be sure the cold air in your home is venting out. The Backdraft Damper Duct is easy to install, and comes with a spring loaded screw driver and installation sheet. The damper duct is also compatible with most air conditioners, range hoods and exhaust fans. The Backdraft Damper Duct comes with a 1-year warranty, and is made in the USA.

The iPower 6 inch Backdraft Shutter Damper Back Draft Blocker is one of the most affordable dampers we tested, and it's one of the quietest. Its design helps keep the valve wings from rattling, and the internal foam strip and smooth-running spring help keep the valve closed when airflow is low. The valve wings open under the pressure created by the airflow and then automatically close with the spring work. The backflow flap closes automatically at low air volumes. The Backdraft shutter is installed so that the damper blades open only in the outflowing air direction, and it comes with the damper blades installed so it can be installed in minutes. The damper fits 6-inch ducting, and the 6-inch length makes it ideal for use in smaller home kitchens. The damper is easy to install, and it's quiet enough for use near sleeping areas. The damper is easy to install, and it's quiet enough for use near sleeping areas. The damper has an external lever for manual opening and closing, and it comes with 4 screws for installation.

The 4" Backdraft Damper Duct Backflow Preventer is a fairly simple device that makes installing an inline fan easier. The backdraft damper fits most 4" ventilation ducts and is easy to install. The backdraft damper comes with 2pcs clamps that attach to the ventilation pipe, and when the damper is closed, the clamps prevent the ventilation pipe from opening. The damper has a spring loaded mechanism, and when installed correctly, the damper can open and close whenever the fan is running. There are two versions of the backdraft damper, one with a closed shutter, and one with a open shutter. The open shutter version can be used when we want to ventilate our home while the air is blowing on the vent. The closed shutter version can be used when we want to ventilate our home when the fan is off. The damper works quickly, and we don't need to install anything. The 4" Backdraft Damper Duct Backflow Preventer is very simple to install.

The Butterfly Backdraft Damper (BD 7) is a high-quality damper that is slightly more expensive than our former top pick, the Backdraft Damper (BD 4). The BD 7 is made of 26-gauge galvanized steel and is 7 inches long. Like the BD 4, the BD 7 is quiet, and it's easy to install. The foam shutter helps keep the damper closed, and the blades are sturdy and long. The BD 7 is also significantly lighter than the BD 4, so it's less likely to hang down from your vent. The BD 7 is not quite as quiet as the BD 4, but it's only slightly quieter, and it's less likely to accidentally close. The BD 7 folds flat, so it's easier (and cheaper) to store. The BD 7 is also slightly less expensive, but this price difference is negligible.