Lennox 17F21 Collector Box 322838-752 Environmental Protection: The NEMA 4X
Baker’s notes & crumb story
Description
Environmental Protection: The NEMA 4X enclosure provides superior resistance against corrosion and water ingress
the unit must be installed in a horizontal upright position to ensure the internal ball-check mechanism functions correctly
ensuring a full-bore discharge when tripped
it is a standard component in several Allied Air brands
Lennox 17F21 Collector Box 322838-752 Environmental Protection: The NEMA 4XThe Lennox 17F21 Collector Box is a critical OEM component designed for high efficiency condensing furnaces, specifically the Lennox EL296 series. As a veteran grade furnace replacement part, this collector box (also referenced by part number 619598 21) is engineered to manage the secondary heat exchanger's condensate flow. It effectively captures and channels corrosive water vapor away from the internal cabinet to prevent moisture damage and ensure