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ensuring a secure and leak-free fit when properly seated in the pilot bracket
6" WC to ensure the sequence of operation meets manufacturer safety standards
Designed for high-reliability flow reversal
the P20BB-1 and P20BB-1C are technically identical
check for carbon buildup on the rod
ZoneFirst SPRD-12X8 Damper Els PW 17895 ensuring a secure and leak-freeThe ZoneFirst SPRD 12X8 is a professional grade barometric static pressure regulating damper designed to maintain optimal bypass airflow in multi zone HVAC systems. As the direct replacement for the PRD 12X8, this 12" wide by 8" high rectangular unit utilizes a counter balanced weighted arm to automatically bleed off excess static pressure when zone dampers close. This critical function prevents high velocity air noise, protects the heat exchanger