For steam requirements

Is the 3H0372760001 compatible with older Modine PowerVented units

Contaminant-Resistant Design: The positive slider bar switch ensures a reliable electrical connection and extends the lifespan of the internal contacts

a manual reset limit switch is a required secondary safety

main body gasket

Lennox 71K11 Pressure Switch Els PW 17895 For steam requirementsThe Lennox 71K11 Pressure Switch is a critical safety component designed for precise vent pressure monitoring in GHR26 series gas furnaces and compatible commercial HVAC units. This single pole, single throw (SPST) switch is factory set to actuate at 0. 75" WC (water column) and features an automatic reset function with a reset threshold of approximately 0. 90" WC. Engineered for durability in high demand environments, the 71K11 ensures the inducer