Navien NFB-175H

Patented stainless steel fire tube heat exchanger—reduces high stress point welds
Advanced user interface with intuitive text display and Quick Dial Wheel for easy navigation
Smart controls with Setup Wizard to simplify boiler start up
Built-in 3 zone pumps or 3 zone valves powered connections
Optional NaviLink Wi-Fi remote control
Common venting up to 8 boilers
Cascading up to 16 boilers
Up to 15:1 turndown ratio
AFUE 95.0%—Energy Star certified
Compact, light weight, wall hung design saves space over traditional floor standing boilers