It must be paired with a Siemens Powermite actuator (such as the SSC or SAS series) for automated operation

critical for restoring furnace operation once safe temperatures are reached

and Series 221 make-up feeders

Optimal Airflow: The forward-curved blade design maximizes air volume in low-to-medium pressure applications commonly found in roof-mounted exhausters

ensuring reliable startup and consistent performance under heavy thermal loads

Markel ET9DTS Thermostat 322056-301 It must be paired withThe Markel ET9DTS Thermostat is a professional grade line voltage thermostat designed specifically for heavy duty electric heat applications. This industrial double pole single throw (DPST) control provides high capacity performance for resistance heating elements and unit heaters in commercial or residential settings. Built with a bimetal bimetallic actuator and a snap action switch, the ET9DTS ensures reliable cycling and a long service life under