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- Required for Cascade/common vent installations with NPE, NFC, NFB and NHB (NHB -110 & NHB-150 models) series units produced on or after September 15, 2016. Includes Cascade Cable (GXXX000546) and common vent collar damper.
Navien® Common Vent Collar Kit, For Use With: NPE Series Premium Condensing Gas Tankless Water Heater and NCB Series Condensing Gas Combination Boiler, Import
- Backflow damper collar
- Domestic / ImportImportManufacturerNAVIEN INCManufacturer #30014367A