The Navien 30014189C Flame Rod Assembly is a genuine OEM ignition and flame-sensing component designed for compatible NHB Series condensing gas boilers. It uses an electrical spark to ignite the gas at the burner and helps the control system verify proper flame presence during operation. Designed specifically for Navien NHB-055, NHB-080, NHB-110, and NHB-150 models, this assembly supp... https://www.partshnc.com/navien-30014189c-flame-rod