Rectangular Dampers

Rectangular Control and Manual Balancing Dampers

Aluminum 3-V, Aluminum Airfoil, Steel 3-V, Steel Airfoil, Thermally Efficient

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CD-100, CD-101

Opposed Blade/Parallel Blade, Extruded Aluminum 3-V Control Damper, up to 3" w.g.

CD-110, CD-111

Opposed Blade/Parallel Blade, (Rollformed) Steel, 3V Blade Control Damper up to 4" w.g.

CD-120, CD-121

Class I, Galvanized Steel Hat Channel Frame and 3V Blade Control Damper, 12" w.g.

CD-145, CD-146

Airfoil Ultra Low Leakage, Aluminum Extruded, Narrow Control Damper with Blades Contained Within the Frame

CD-150, CD-151

Airfoil Ultra Low Leakage, Aluminum Extruded, Control Damper

CD-160, CD-161

Class I, Galvanized Steel Hat Channel Frame, Airfoil Blade Control Damper

CD-170, CD-171

Class I Airfoil Blade, Galvanized Steel Control Damper

CD-75, CD-76

Low Leakage, Thinline Aluminum Extruded Control Damper

MZD-100

Dual Deck Zone Mixing Damper

MZD-100-3

Triple Deck Zone Mixing Damper

MD-105, MD-106

Extruded Aluminum Manual Balancing Damper

MD-115, MD-116

3V Blade Galvanized Manual Balancing Damper

MZD-150

Airfoil Blade Dual Deck Zone Mixing Damper

TB-155, TB-156

Alum. Rectangular, Thermally Efficient, Insulated Airfoil Blade Damper

SW-155, SW-156

Airfoil Alum. Anodized Rectangular Damper with 316 Stn. Stl. Components

Rectangular Dampers for Commercial and Industrial Air Control

United Enertech offers a full line of high-performance rectangular dampers designed to meet the airflow control, balancing, and backdraft needs of commercial and industrial HVAC systems. Whether you’re installing a manual rectangular duct damper, a rectangular balancing damper, or an opposed blade damper, our products deliver proven durability, precision, and code-compliant performance.

From air handling units and mechanical rooms to kitchen range hoods and wall vents, our rectangular duct dampers are built to handle the toughest airflow challenges in both new construction and retrofit applications.

High-Quality Rectangular Duct Damper Solutions

Our rectangular dampers are available in a wide variety of blade styles, pressure ratings, and operating configurations. All models are designed for compatibility with rectangular ductwork and are constructed using galvanized steel, stainless steel, or aluminum for long-lasting strength.

Common features include:

Welded or mechanically fastened frames for maximum rigidity
Parallel or opposed blade damper designs for uniform airflow or zoning
Low-leakage seals and blade stops for precise shut-off
Available with manual, electric, or pneumatic actuation

Our Rectangular Damper Product Line

United Enertech’s product range includes several types of HVAC rectangular dampers for various performance needs:

Control Dampers

Our control dampers regulate airflow through HVAC systems and are available in both airfoil remote and low-profile blade designs. Choose from parallel or opposed blade dampers depending on your pressure and mixing requirements. These dampers are ideal for terminal units, mixing boxes, or plenum spaces.

Balancing Dampers

Rectangular balancing dampers are used to adjust and equalize airflow across multiple zones. These models are often installed in branch ducts to fine-tune air volume delivery and ensure balanced HVAC performance throughout a building. We offer manual rectangular duct dampers for basic field adjustment or models with remote cable and actuator controls.

Backdraft Dampers

Our rectangular duct backdraft dampers are gravity- or spring-operated to prevent reverse airflow. These are ideal for return air ducts and exhaust systems where one-way airflow is essential. Optional positive seal configurations ensure tight shut-off when the system is off.

Zone Dampers

Designed for zoned HVAC systems, rectangular zone dampers allow separate temperature control in individual spaces. These are commonly used in VAV systems, smart homes, and office buildings, and can be equipped with modulating actuators for responsive airflow control.

Specialized Applications

We also manufacture dampers for niche uses, such as range hood rectangular positive seal dampers to block cooking exhaust when not in use, or rectangular wall vent dampers & screens for air intake or exhaust at exterior openings.

Engineered for Performance and Flexibility

Custom sizes and materials to meet your project specs
Manual or automated controls for easy field adjustment or BMS integration
Low pressure drop designs for energy-efficient airflow
Positive seal models available for near-zero leakage
Built for retrofit or new duct installations

Applications for United Enertech Rectangular Dampers

Our rectangular damper solutions are used across a wide range of industries and environments:

Commercial office buildings and high-rises
Hospitals and laboratories
Industrial and manufacturing plants
Educational institutions and government facilities
Restaurants, kitchens, and hospitality properties

Choose United Enertech for Precision Damper Solutions

When airflow control and system reliability are critical, choose United Enertech rectangular dampers. Whether you need a rectangular duct damper for pressure regulation, a blade damper for zone control, or a rectangular duct backdraft damper, our engineered solutions provide the performance and durability your project demands.

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