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NFB-399C
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NFB-399C
high efficiency Condensing Heating Boiler
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
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