this part provides the exact tolerance required to maintain indoor air quality and system performance standards

By maintaining the integrity of the liquid distribution system

where precise draft inducer performance is required to satisfy pressure switch logic and ensure safe combustion gas venting

Converting this valve for LP use is not recommended as it is factory-calibrated for NG pressure ranges

Lochinvar & A.O. Smith 100327064 Switch L99H008 this part provides the exactThe Lochinvar & A. O. Smith 100327064 Switch is a critical OEM replacement part designed for high performance commercial and residential heating systems. As a primary main power switch, this component ensures the safe manual isolation of the 120V circuit, allowing contractors to perform maintenance or diagnostic checks without fully depowering the mechanical room's sub panels. Engineered for seamless HVAC system integration, it maintains the