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The Sporlan 168304 is technically identical to the BQC-AA cartridge
For technicians performing field service or OEM replacements
For 15 psi steam service
This HVAC replacement part serves as a direct substitute for legacy plates in unit heaters and ventilation systems
this mercury-free thermostat is the direct technician-recommended upgrade
Reznor 97479 Relay Els PW 17895 The Sporlan 168304 is technicallyThe Reznor 97479 Time Delay Relay is a critical field service component designed for precise sequence control in Reznor gas fired unit heaters. Engineered for high duty cycle applications, this DPDT (Double Pole Double Throw) relay manages the timing of the blower motor and inducer fan, ensuring the heat exchanger reaches optimal temperature before airflow begins and purging residual heat during the post purge cycle. Operating on a standard 24V