Durable Construction: Shock and vibration resistant internal mechanism ensures long-term positive make/break action

providing flexibility for various setpoint and sensing requirements

ensuring precise fan cycling and preventing short-cycling in high-demand environments

the DFS-221 features 1/4" barbed sample line connections and standard 1/4" 90° male quick-connect spade terminals

York S1-3500-412P/A Heater Element Els PW 17895 Durable Construction: Shock and vibrationProfessional contractors recognize the York S1 3500 412P A heater element as the essential replacement for electric heat kits in York air handlers. This 11. 2kW electric heat kit operates at 240V, delivering precise thermal output for auxiliary or emergency heating stages. As a specialized HVAC heater coil replacement, it includes factory integrated thermal limits that provide critical protection against overheating in cases of low static pressure or