ZoneFirst AOBD-20X10 Damper 328140-751 ensuring the gap remains at

ensuring the gap remains at factory settings

Enhanced Connectivity: Features a 2-wire Sylk Bus interface that simplifies the wiring of enthalpy and CO2 sensors for Demand Control Ventilation (DCV)

this is an automatic reset switch

Standard head mechanisms generally require a separate 10-bolt flange gasket (Part No

and gaskets eventually fail under thermal cycling

ZoneFirst AOBD-20X10 Damper 328140-751 ensuring the gap remains atThe ZoneFirst AOBD 20X10 Damper is a professional grade automatic opposed blade damper engineered for precision bypass and zone control in high demand residential and commercial ductwork. This 20" wide by 10" high unit features an anodized extruded aluminum frame and blades, ensuring a low profile footprint that fits into 3 inch slots for streamlined side mount installation. Each blade is connected via a stainless steel draw bar and nickel plated