Installation Ready: Standard 3/4-inch NPT connections (Male x Female) allow for straightforward replacement in existing pipe networks

Optimized Thermal Management: Shaded pole design provides natural internal overload protection for continuous duty cycles

and 36G series valves

electric heat elements

ensuring no-gap fitment

Lennox 15M20 Pressure Switch Els PW 17895 Installation Ready: Standard 3/4-inch NPTThe Lennox 15M20 Pressure Switch is a critical safety component designed for precise draft proving in residential and commercial furnaces and rooftop units. This OEM Lennox 15M20 switch is a single pole, single throw (SPST) normally open configuration that closes when it detects a pressure fall of . 10"wc. Built with a 1 4" barb connection for easy hose attachment, this air proving switch ensures the combustion air inducer is pulling sufficient vacuum