ZoneFirst SPRD-12X10 Damper Els PW 17895 standard T100 timers require the

standard T100 timers require the 156T1978A series

Is a vent limiting device required

By utilizing this globe valve adapter kit

Key Benefits for HVAC Professionals Precise 0

ZoneFirst SPRD-12X10 Damper Els PW 17895 standard T100 timers require theEstablishing proper bypass airflow is essential for any multi zone residential or light commercial system, and the ZoneFirst SPRD 12X10 provides a reliable, barometric solution for managing static pressure. This 12" wide by 10" high barometric relief damper is engineered to automatically divert excess air back to the return air plenum when zone dampers close, preventing high velocity noise and maintaining consistent CFM delivery across active zones.