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Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
Field-tested for compatibility
this normally open pressure switch offers reliable electrical continuity and long-term durability in demanding thermal environments
ensuring no-hassle retrofits for maintenance contractors
it is designed to seal dry on clean
It provides the same fit and function as the previous version used in older Modine unit heaters
Zonefirst SPRD-18 Damper 30067439-890 Field-tested for compatibilityThe Zonefirst SPRD 18 is a professional grade 18 inch round barometric bypass damper engineered to maintain critical static pressure relief in multi zone HVAC applications. As zone dampers close, this single blade mechanical component automatically responds to rising pressure, diverting excess airflow to the return plenum or a dump zone to prevent coil icing and blower motor strain. Unlike motorized alternatives, the SPRD 18 utilizes a counter
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