Io Hvac Controls EB-1208-BM Motorized Bypass Damper 12x8

Product Description

The IO HVAC CONTROLS EB-1208-BM is a heavy-duty motorized bypass damper designed for duct zoning systems in forced-air HVAC applications. It provides automatic pressure relief by diverting excess conditioned air when zone dampers close, protecting the blower from excessive static pressure buildup. The unit features a bottom-mount configuration, making it suitable for installations where access or ductwork orientation requires mounting from below. With a 12-inch by 8-inch duct opening, this damper fits standard rectangular duct runs and is installed by licensed HVAC technicians during zoning system commissioning or service.

This damper is used in residential and light commercial forced-air zoning systems where multiple zones create variable static pressure conditions. The bottom-mount design accommodates specific plenum or ductwork layouts where a standard side-mount configuration is not practical. It is typically installed on the supply plenum or a dedicated bypass duct connecting the supply side back to the return side of the air handler.

Key Features

• 12-inch by 8-inch duct opening fits standard rectangular duct runs
• Bottom-mount configuration supports installations with restricted access or specific duct orientation
• Motorized actuator provides automatic bypass operation within zoning control systems
• Heavy-duty construction rated for continuous cycling in active zoning applications
• Overall unit dimensions of 14 inches wide by 16 inches tall by 8 inches deep allow for clearance planning during rough-in

Compatibility

Designed as an OEM-style replacement or new-installation bypass damper for residential and light commercial forced-air zoning systems requiring a 12-inch by 8-inch rectangular bypass duct connection.

Installation Notes

Installation should be performed by a licensed HVAC technician. Shut down the air handler and disconnect power to the zoning control system before mounting or wiring the damper. Verify that the bypass duct routing and total external static pressure calculations meet system design requirements before commissioning. Refer to the zoning controller manufacturer wiring diagram for proper actuator low-voltage control connections.