Backdraft Dampers

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Proper ventilation and airflow are essential in providing fresh air in homes, offices, industrial, and commercial spaces. Keeping warehouses, manufacturing units, and areas such as shopping malls free of odor is also an essential factor. Utilizing a backdraft damper can meet these needs. Backdraft dampers are valuable in regulating the quality of air and the flow of air while preventing reverse airflow. With over 35 years of experience manufacturing and supplying quality equipment and service, we’re here to share our knowledge and help meet all your H.V.A.C. needs.

What is a Backdraft Damper?

A Backdraft Damper is one of several pieces in a ventilation system that is essential in helping your system work properly. To ensure healthy, quality air, the backdraft damper helps regulate the airflow throughout each room. It is designed to allow contaminated air to flow out while it is also intended to prevent contaminated air from recycling back in. The dampers are made of high-quality aluminum and thoroughly checked to meet all standards.

Backdraft dampers also help rid unwanted odors and stale air that would otherwise linger. This may include fumes and vapors in various work areas. Backdraft dampers help increase the air quality while reducing health risks for workers in these conditions.

How Does a Backdraft Damper Work?

The Basics

A backdraft damper can let contaminated air flow in one direction. Once the air is outside, the damper then closes to keep the contaminated air from cycling back in. These dampers are designed to close by gravity; opening and closing by velocity and pressure. Other dampers are designed to open and close by a motor.

Opening the Damper Blades

A backdraft damper is positioned in the duct system while its specially designed blades are what allows air to flow in only one direction. In order for the blades to open, backdraft dampers may use any one of the below three options:

  • Motor packs may be utilized when the opening and closing of the damper blades cannot rely on the air pressure or velocity.
  • Counterbalance weights that are adjustable offer the most precision. They can reduce the amount of pressure necessary to open the backdraft damper.

Additional Benefits

Utilizing a backdraft damper not only keeps the contaminated air from coming in, but it also keeps the cold winter air out as well. Backdraft dampers help prevent backdrafts while ridding hot air from various heating sources. This is a valuable benefit by significantly improving the air flow in areas of concern including an attic, chimney, laundry facility, or a furnace room.

The dampers are quiet, efficient, and come in various sizes to meet your system’s needs. Installing a backdraft damper on a propeller fan will serve as a preventative to wind forcing the fan to run backwards if the power is off.

Our Backdraft Dampers

AC30-BRD Spiral Duct Backdraft Round Damper

Frame: 6” Deep 22/20 Ga. galvanized steel roll formed and welded double beaded for rigidity and spiral duct connections
Blades Type: Single blade 22 Ga. Galvanized Single “V” formed stiffener
Seals: Low leakage closed cell neoprene
Bearings: Non-metallic celcon
Axles: Zinc plated steel
Finish: Mill galvanized
Shaft: 1/2 inch round x 6” long zinc plated steel shaft extending 3 inches beyond the air control frame

AC40-BRD Classic Backdraft Round Damper

Frame: 4” Deep 16 Ga. galvanized steel roll formed and welded double beaded for rigidity and spiral duct connections
Blades Type: Single blade 22 Ga. Galvanized Single “V” formed stiffener
Seals: Low leakage closed cell neoprene
Bearings: Non-metallic celcon
Axles: Zinc plated steel
Finish: Mill galvanized
Shaft: 1/2 inch round x 6” long zinc plated steel shaft extending 3 inches beyond the air control frame

                LBD-1 Channel Backdraft Damper

Frame: 6063T5 Extruded aluminum Minimum wall thickness 16 Ga.
Blades Type: 6063T5 Extruded aluminum 16 Ga. counterbalance rod holder built into rear of blades
Seals: Vinyl blade
Axles: Cast aluminum
Linkage: 16 Ga. x 5/8” wide aluminum concealed in the channel frame
Orientation: Horizontal or vertical
Finish: Mill finish

LBD-1-Combo-2 Backdraft Damper/Louver Exhaust Air Combo

Combination: Back-draft damper LBD1 and louver either 2″ 4″ or 6″
Sleeve: 16 Ga. galvanized steel (Length is based on wall thickness and louver depth)

LBD-1-Combo-3 Backdraft Damper/Louver Exhaust Air Combo

Combination: Back-draft damper LBD1 and louver either 2″ 4″ or 6″
Sleeve: 16 Ga. galvanized steel (Length is based on wall thickness and louver depth)

                LBDF-1 Rear Flange Backdraft Damper

Frame: 6063T5 Extruded aluminum Minimum wall thickness 16 Ga.
Blades Type: 6063T5 Extruded aluminum 16 Ga. counterbalance rod holder built into rear of blades
Seals: Vinyl blade
Axles: Cast aluminum
Linkage: 16 Ga. x 5/8” wide aluminum concealed in the channel frame
Orientation: Horizontal or vertical
Finish: Mill finish

                LBDF-2 Rear Flange Backdraft Damper

Frame: 6063T5 Extruded aluminum Minimum wall thickness 16 Ga.
Blades Type: 6063T5 Extruded aluminum 16 Ga. counterbalance rod holder built into rear of blades
Seals: Vinyl blade
Axles: Cast aluminum
Linkage: 16 Ga. x 5/8” wide aluminum concealed in the channel frame
Orientation: Horizontal or vertical
Finish: Mill finish

Our Work

With well over 35 years as a leading H.V.A.C. distributor and manufacturer, our products have been installed worldwide in a variety of buildings, including casinos, stadiums, and skyscrapers. Such projects include the reconstruction of the Chrysler Building in Chicago and Yankee Stadium in New York.

Our Representatives

We are proud to provide you with exceptional local H.V.A.C. reps all over the country. We have local representatives that are ready to answer your questions and take care of your backdraft damper project needs. All of our reps will provide you with experience, knowledge, and quality work you can depend on. You’ll also find International reps we work within various countries.

No matter how big or small your project is, you’ll find the damper that meets your needs and a team that’s ready to help. Contact your local rep for a quote today.