HVAC Dampers

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Residential Use

Essential for controlling airflow between rooms, maintaining a comfortable temperature across the home. 

Commercial Use

Designed to regulate air quality and temperature in offices, conference rooms, and other spaces that require specific climate control.

Product Highlights
  • Butterfly Backdraft Damper

    Designed for heat exchangers, air exhaust systems, and HVAC applications where powered dampers are not needed. This damper works in both horizontal and upward air flow positions, featuring a foam seal for minimal air leakage and angled aluminum blades.

  • Motorized HVAC Damper (Normally Closed)

    Made from durable 28 gauge galvanized steel and available in a range of diameters from 4 inches to 14 inches. It is powered by either a 24-volt or 120-volt motor, with optional end switches.

  • Galvanized Wall Vent (Reversible Backdraft Damper)

    Features a gasketed backdraft damper that can be positioned for either intake or exhaust, along with an â…› inch insect screen to prevent pests, and an angled hood design for optimal airflow.

HVAC Dampers Installation Tips
  • Proper Placement

    Install HVAC dampers where pressure build-up is likely to occur. Some dampers can be integrated with zone controllers to automate airflow management.

  • Damper Selection

    Choose dampers based on climate and specific ventilation needs.

  • Professional Installation

    While some dampers may be installed by DIYers, professional installation is recommended for complex systems or areas with challenging access.

Frequently Asked Questions

What is the primary purpose of HVAC dampers?

HVAC dampers regulate and control the airflow within an HVAC system. Dampers are installed in ducts to adjust the volume of air reaching different parts of a building or space. By opening or closing, dampers allow for better temperature control, zoning, and air distribution efficiency.

How do I choose the right HVAC dampers for my needs?

Choosing the right HVAC dampers depends on several factors. Determine whether you need manual or motorized dampers. Motorized dampers are ideal for systems requiring automated control and zoning. In addition, opt for dampers that match the size of the ducts and airflow requirements. A properly sized damper ensures optimal airflow regulation and system efficiency. 

What warranty is provided with HVAC dampers?

FAMCO provides a one-year customer satisfaction guarantee for our dampers, which includes a one-year warranty for manufacturing defects. If you experience any issues or defects with the dampers, contact our customer support team for assistance.

Learn More About Our HVAC Dampers

HVAC Dampers

Precise airflow control is essential for optimizing system efficiency, regulating indoor temperatures, and preventing unwanted cold drafts or pressure imbalances. FAMCO manufactures high-performance HVAC dampers engineered for seamless integration into residential ductwork, commercial ventilation lines, and forced exhaust systems.

Constructed from heavy-gauge galvanized steel and lightweight aluminum, FAMCO dampers deliver long-term reliability and airtight closure. Whether you need to buy HVAC dampers online for zone temperature control, inline backdraft prevention, or automated fresh air intake, FAMCO provides precision-crafted solutions built to last.

Backdraft and Inline Butterfly Dampers

Preventing outside air, fumes, and moisture from flowing backward through your ductwork is critical for energy efficiency and indoor air quality. FAMCO offers a wide selection of gravity and spring-loaded butterfly backdraft dampers and inline butterfly dampers with springs. Equipped with angled aluminum blades and neoprene foam seals, these dampers open easily under air pressure and seal tight when airflow stops.

For versatile wall terminations, FAMCO reversible dampers can be flipped for either intake or exhaust configurations, protecting bathroom fans, range hoods, and dryer lines from external backdrafts.

Motorized and Barometric Dampers

Automated ventilation and pressure management require dynamic damper systems that respond to system demand. FAMCO manufactures heavy-duty normally closed motorized dampers and normally open motorized dampers. Powered by reliable 24V or 120V motors, these units seamlessly interface with thermostats, zone controllers, and fresh air systems.

For passive pressure regulation, FAMCO pressure relief barometric dampers automatically release excess static pressure in zoned duct systems, ensuring balanced airflow and quiet system operation.

Manual Volume Dampers and Make-Up Air Kits

Customizing airflow to specific rooms or balancing multi-branch duct systems requires durable manual adjustment components. FAMCO carries heavy-duty manual dampers featuring easy-locking regulator handles for precise duct airflow throttling.

To meet modern building codes for tight home envelopes, complete make-up air kits provide everything required to introduce fresh combustion and relief air safely into kitchen exhaust and HVAC setups, preventing depressurization and backdrafting of gas appliances.

The FAMCO Standard

Rely on FAMCO as your trusted manufacturer for industrial-grade HVAC dampers, motorized airflow actuators, backdraft inline stops, and pressure relief kits. Need technical support selecting motor voltages, sizing duct connections, or configuring fresh air intake systems? Contact our ventilation specialists for expert guidance or request a quote for commercial or residential bulk orders. Installing FAMCO HVAC dampers delivers total control over system efficiency, zone comfort, and building envelope performance.

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FAMCO HVAC Dampers Benefits

Energy Efficiency
Controls how much air is directed to various rooms or zones, preventing over-conditioning in areas that do not require it.
Moisture Control
Protect HVAC equipment from pressure build-up, helping to prevent potential damage to the system.
Improved Air Quality
Promotes fresh airflow for different area specific zoning.