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Learn about different types of backdraft dampers for commercial HVAC systems. Backdraft dampers prevent reverse airflow and can be gravity or motorized operated.
- What Is A Damper?
- Damper Construction and Types
- How to Choose The Right Backdraft Damper For Your Home
- Backdraft Damper Orientation
- Maintenance
- Do You Need One?
- Common Questions
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Dampers are devices for controlling the direction, volume, and/or flow of air through a building’s ducting, intakes, and exhaust vents. Looking at this in a little more detail, we can say that dampers are used to control: 1. The inward flow of air at intakes, which is important for maintaining air pressure balances and indoor air quality among othe...
A home may benefit from or even officially require one or more dampers if it has any type of ventilation devices, including passive vents, range hoods, intake or exhaust fans, and HVAC systems. Dampers are commonly made of steel, aluminum, fiberglass, or plastic, and the frames can be rectangular, square, oval, or round to suit the different shapes...
Here are the seven key factors to consider while choosing a backdraft damper for your home (alternatively, you can jump to the comparison table).
Depending on the model, backdraft dampers need to be installed in either a horizontal or vertical orientation. Some dampers can be installed in both vertical and horizontal planes, but such use must be explicitly approved by the manufacturer. When installed for airflow in the horizontal plane, backdraft dampers with slats must always be positioned ...
Dampers require regular maintenance and should be inspected at least every six months, as a rule of thumb. Here are a few tips on what to watch out for during a damper maintenance inspection: 1. Smooth and free movement of blades throughout the blade’s full range of movement. Verify with the manufacturer’s instructions whether any electric/pneumati...
In some cases, such as bathroom exhaust fans, backdraft dampers are not required by the building codes. In other cases, such as for range hoods, the building codes specifically require the installation of the dampers. However, any system that is designed to channel air in a specific direction and for which air traveling in the opposite direction wo...
Where do you put a backdraft damper?
Ducts or openings where conditioned, filtered, or clean air meets unconditioned, unfiltered, or dirty air are ideal locations for backdraft damper placement or installation. Typical examples are wall vents, roof vents, and exhaust ducts from bathrooms and range hoods.
Do I need more than one backdraft damper?
Some exhausts like range hoods and bathroom fans have inbuilt backdraft dampers. In such cases, an extra backdraft damper where the device’s ducts meet external air can improve backdraft prevention and fan life. Ensure the extra dampers do not cause excessive pressure drops, which can damage fans.
What is the difference between louvers, backdraft dampers, and motorized dampers?
Louvers keep dirt and debris out of ducts, while backdraft dampers ensure unidirectional airflow. Springs, gravity, or airflow usually control backdraft dampers, unlike motorized dampers. However, motorized dampers can function as backdraft dampers, such as on exhaust fans with motorized dampers.
Learn what backdraft dampers are, how they work, and how to choose and use them for your home. Compare different types, sizes, and features of backdraft dampers and find the best one for your needs.
A backdraft damper is able to allow contaminated air to flow out of the home but prevents contaminated air from sweeping back in to the home. Without a backdraft damper in place, horrid odors that sometime infiltrate a certain room in the home would not have a way of dissipating.
May 16, 2024 · Backdraft dampers are a specialized type of damper designed to prevent air from flowing the wrong way in an air duct. Often thought of as check valves for ductwork, backdraft dampers keep air flowing as it should.
May 25, 2021 · Learn the differences between backdraft and relief dampers, how they operate and where they are used in HVAC systems. Find out the energy code requirements and how to select the right damper for your application.
Model BD is a backdraft damper used in ventilation systems, allowing airflow in one direction and preventing airflow in the opposite direction. Rated for duct velocities up to 1,500 ft/min. Horizontal and vertical mounting options.
Dec 5, 2023 · Backdraft dampers are devices that regulate airflow and prevent unwanted influx in ducts and vents. Learn about the different types of backdraft dampers for residential and commercial applications, how they work, and why they are important for indoor air quality and energy efficiency.
