Io Hvac Controls EB-2018 Motorized Bypass Damper 20x18

Product Description

The IO HVAC CONTROLS EB-2018 is a heavy-duty motorized bypass damper designed for use in forced-air HVAC zoning systems. It automatically redirects excess conditioned air back to the return side of the air handler when zone dampers close, protecting the blower from high static pressure buildup. The EB-2018 fits a 20 x 18 inch duct opening and ships at 14 pounds, indicating a robust construction suited for demanding commercial and residential applications. Licensed HVAC technicians install this component as part of a complete zoning control setup to maintain balanced airflow across the system.

The EB-2018 is used in residential and light commercial forced-air systems where multiple zone dampers are controlled by a zoning panel. When downstream zones close, static pressure rises in the supply duct. The motorized bypass damper opens in response to that pressure, routing air back to the return plenum and preventing damage to the blower motor and heat exchanger. It is a critical component in any properly engineered zoning installation and is handled by HVAC technicians during both new installation and retrofit zoning projects.

Key Features

• Heavy-duty construction rated for continuous cycling in zoning applications
• Motorized actuator for automatic pressure-relief operation
• 20 x 18 inch duct opening for high-capacity airflow bypass
• Packaged dimensions of 21 x 26 x 8 inches to accommodate mounting flanges and actuator housing
• 14-pound unit weight reflects durable metal construction suitable for permanent installation

Compatibility

Designed as an OEM-style motorized bypass damper for use in forced-air HVAC zoning systems requiring a 20 x 18 inch bypass duct opening.

Installation Notes

A licensed HVAC technician should install this damper. Power down the air handler and disconnect all low-voltage control wiring before beginning installation. The damper must be mounted and wired in accordance with the zoning panel manufacturer instructions and applicable mechanical codes. Do not operate the system without verifying that the actuator wiring and control signal are correctly matched to the zoning controller output.