This 3-inch blade is typically found in specific power-vented units where space is a constraint

031-inch diameter orifice (check specific model requirements) is designed to withstand high thermal stress while providing consistent flow rates

While similar in function

the ETR503 eliminates the need for field calibration

this furnace limit control provides essential circuit interruption to prevent damage and maintain system integrity

Belimo ZG-TF2 Adaptor Kit This 3-inch blade is typicallyThe Belimo ZG TF2 Crankarm Adaptor Kit is a field proven solution for damper actuator retrofit applications where direct coupling to the damper shaft is physically obstructed or impossible. Specifically engineered for the Belimo TF series actuators, this kit enables seamless integration of TFB(X) spring return actuators into existing mechanical linkages, effectively replacing legacy foot mounted, crankarm style units from Honeywell, Johnson Controls,