Navien NFB-399-C Condensing Fire Tube Boiler 399,000 Input 97.5% EFF

Navien NFB-399-C Condensing Fire Tube Boiler 399,000 Input 97.5% EFF

Features:

• 97.5% TE Industry Leading Thermal Efficiency Patented stainless steel fire tube heat exchanger
• 160 PSI maximum operating pressure
• Advanced controls with intuitive 7” color display
• Up to 15:1 TDR (turndown ratio)
• BAS communication capability
• Common vent up to 4 and cascade up to 32 units
• Top & bottom piping