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The IO HVAC CONTROLS EB-2424 is a heavy-duty motorized bypass damper designed to regulate airflow in zoned HVAC systems. When individual zones close, excess static pressure builds in the supply duct. This damper opens automatically to divert that surplus air back into the return or a bypass duct, protecting the air handler and maintaining system balance. At 24 x 24 inches in face size, it is sized for medium to large commercial or high-capacity residential applications. Licensed HVAC technicians and sheet metal contractors are the typical installers for this class of equipment.
The EB-2424 is suited for variable air volume and zoned forced-air systems where static pressure control is critical. It installs in the supply plenum or a dedicated bypass duct run between supply and return. Typical applications include multi-zone residential systems with multiple zone dampers and light commercial variable-air-volume installations where blower protection and airflow balance are required.
Designed as an OEM-style motorized bypass damper for zoned forced-air HVAC systems requiring a 24 x 24 inch bypass opening.
Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with applicable mechanical codes. Shut down and lock out the air handler before cutting into the duct and mounting the damper. Verify that the control wiring to the damper actuator is routed and connected per the zone control board manufacturer's wiring diagram. Confirm all duct connections are sealed to prevent air leakage before returning the system to service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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