Ewc Controls EPRD-12X8 Bypass Damper 1000 Cfm 12x8 in

Product Description

The EWC CONTROLS EPRD-12X8 is a single-blade, barometric pressure regulating bypass damper designed to manage excess static pressure in zoned forced-air HVAC systems. The damper uses a counterbalanced weighted arm to open automatically when downstream static pressure rises above the set point, bypassing surplus conditioned air and protecting the blower from overpressure conditions. It is rated for 1000 CFM and measures 12 inches by 8 inches in a rectangular profile. The arm adjustment and supplied weights allow field calibration without additional tools. This component is typically installed by licensed HVAC technicians during system commissioning or zone-control retrofits.

The EPRD-12X8 is suited for residential and light-commercial forced-air systems where two or more zone dampers are present. When zone dampers close, system static pressure rises. Without a bypass damper, that pressure increase can reduce airflow, strain the blower motor, and cause comfort complaints. This damper addresses that condition by providing a passive, economical relief path. It is commonly installed in the supply plenum or a dedicated bypass duct connecting supply to return.

Key Features

• Single-blade barometric design opens and closes passively with no motor or controls wiring required
• Counterbalanced weighted arm allows field adjustment of the opening set point
• Rated airflow capacity of 1000 CFM
• Rectangular steel construction sized at 12 inches by 8 inches
• Economical bypass solution for zoned forced-air HVAC applications

Compatibility

Designed as an OEM-style replacement or new-installation bypass damper for residential and light-commercial zoned forced-air HVAC systems requiring a 12-inch by 8-inch rectangular bypass damper with up to 1000 CFM capacity.

Installation Notes

Installation is performed by a qualified HVAC technician. Shut down and lock out the air handler or furnace before cutting into any ductwork or plenum. The damper must be mounted so the blade swings freely and the weighted arm is oriented correctly per the manufacturer instructions to allow proper barometric operation. After installation, verify arm adjustment with the system running under partial-zone load to confirm the damper opens at the intended static pressure condition.

Technical Specifications

• Size: 12 inches x 8 inches
• Shape: Rectangle
• Air Flow Capacity: 1000 CFM
• Material: Steel
• Application: Zoned HVAC Air Quality / Pressure Regulation

Standard Information

• Brand: EWC CONTROLS
• Manufacturer Part Number: EPRD-12X8