Install this switches in wall mounted furnaces to maintain optimal combustion conditions during daily hot water production, particularly in environments with fluctuating ventilation demands Universally suitable for major brands appliances, this wind pressure switches functions as a critical wall hung furnaces component for sustained Featuring double pressure settings ( 75 / 55Pa and 65 / 40Pa) and constructed from high temperature resistant, proof materials, this water heater accessory delivers precise pressure response with enhanced longevity Designed for homeowners and commercial property managers requiring stable boiler components, it serves as an essential upgrade for residential heating systems and business establishments This wind pressure switches ensures safe operations of your water heater by continuously air pressure levels, potential hazards from inadequate or excessive ventilation