Extra Data: 3'' venting up to 60'' and 4'' venting up to 150'', 97.5 Percent TE, Up to 15:1 TDR
Family: Nfb C
Description: Navien NFB-C series are commercial condensing boilers featuring patented fire tube stainless steel heat exchanger, advanced burner system, smart controls with 7 color touch screen display, industry-leading TE of 97.5 Percent, built-in 3 zone pump relays, t
Extra Data: 3'' venting up to 60'' and 4'' venting up to 150'', 97.5 Percent TE, Up to 15:1 TDR
Family: Nfb C
Description: Navien NFB-C series are commercial condensing boilers featuring patented fire tube stainless steel heat exchanger, advanced burner system, smart controls with 7 color touch screen display, industry-leading TE of 97.5 Percent, built-in 3 zone pump relays, t