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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
Maintenance-Free: Factory calibrated with a platinum PTC sensing element that maintains accuracy over time without manual adjustments
Resilient Construction: Built to withstand the high-vibration environment of a mechanical room or rooftop unit
High Close-Off Pressure: Engineered to provide a tight shut-off up to 122 PSI
and function for a drop-in replacement
This unit is built for continuous air-over (DAO) operation
ZoneFirst AOBD-20X10 Damper 320788-703 Maintenance-Free: Factory calibrated with aThe 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
