Safety Compliance: Ensures the combustion process only occurs when the flue is properly vented

typically up to 30 PSI

this is the enclosure cover only

What are the exact dimensions for installation

Rheem-Ruud 42-102056-03 Pressure Switch Els PW 17895 Safety Compliance: Ensures the combustionThe Rheem Ruud 42 102056 03 Dual Pressure Switch is a critical safety component designed for high efficiency gas furnaces, including the RGRM series and models from Weather King and Corsaire. This OEM replacement pressure switch features a dual sensing configuration calibrated to specific trip points: 0. 86" W. C. and 1. 20" W. C. As a normally open switch, it monitors the vacuum created by the inducer motor to ensure proper venting and combustion