preventing system bypass

it is optimized for Lennox equipment

This OEM Trane expansion valve features a 3/8" inlet and a 1/2" outlet with sweat connections

making it a staple for HVACR liquid level monitoring and boiler water controls

Field Controls 46525600 Air System mario preventing system bypassFor contractors managing tight residential or light commercial mechanical rooms, the Field Controls 46525600 CAS 4JR Combustion Air System is the industry standard solution to overcome inadequate makeup air in confined spaces. This motorized fan in a can system provides a reliable, mechanical source of exterior air directly to your 24V gas appliance, supporting natural gas or LP burning furnaces, boilers, and water heaters with a combined firing rate