Resultado de búsqueda
Backdraft dampers (also called gravity dampers) allow airflow in one direction and prevent reverse airflow for use in exhaust or intake HVAC systems.
Shop Greenheck BD. 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.
25 de may. de 2021 · Backdraft dampers, also known as gravity dampers, are used in ventilation systems to allow airflow in one direction and prevent airflow in the opposite direction. A relief damper has an elevated and adjustable start-open pressure while providing the backdraft function - think of it as controlled leakage in the direction of flow.
- 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
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.
Backdraft dampers (also known as gravity dampers) are used in ventilation systems to allow airflow in one direction and prevent airflow in the opposite direction. A relief damper is developed with an elevated and adjustable start-open pressure while providing the backdraft function.
- 638KB
- 20
In this installation video, we show you how to install a back draft damper. Back draft dampers allow exhaust air to flow out of the home while stopping air from the outside of the home to...
- 2 min
- 153.6K
- Fresh Air Manufacturing Co (FAMCO)
A backdraft damper is one of the minute pieces needed to help the overall function and purpose of the ventilation system do its job correctly. 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.
