Lennox 21N39 Scale Insert 319852-301 Designed as a direct replacement

Designed as a direct replacement for various Trane and American Standard heat pump controls

With a 13 Amp contact rating

Using natural gas components in LP systems creates a safety hazard due to different pressure and orifice requirements

Designed for high-reliability industrial and commercial refrigeration cycles

Lennox 21N39 Scale Insert 319852-301 Designed as a direct replacementMaintain peak performance in humidification systems with the Lennox 21N39, a precision engineered scale control insert designed to manage mineral accumulation and ensure consistent evaporation rates. This OEM humidifier replacement part acts as the structural frame and pad holder for high capacity systems, effectively channeling water across the media while trapping scale before it can compromise internal components. Measuring 14 3 8" by 10", this