For any commercial HVAC controller installation where the remote bulb is mounted externally

Built with a corrosion-resistant stainless steel core and a closed-cell foam sleeve

The heavy-duty NEMA 1 housing includes a 1/2" NPT nipple for direct mounting to electrical boxes

The PTFE O-ring ensures a superior external seal against refrigerant leaks

Lennox 80K28 Pressure Switch Els PW 17895 For any commercial HVAC controllerThe Lennox 80K28 is a critical safety component designed for precise furnace pressure monitoring in high efficiency gas fired systems. This OEM Lennox replacement part, also identified as 80K2801, features a factory calibrated set point of . 43" WC (Water Column) to ensure the inducer motor is generating sufficient draft before allowing ignition. Built for durability in demanding HVAC ventilation systems, the switch utilizes a Single Pole Single Throw