NTH750NJX3 750 MBTUH Input Up to 96% Thermal Efficient Condensing Hydronic Boiler - Stainless Steel Heat Exchanger with Welded Construction - ASME Rate to 160 PSI Maximum Working Pressure - High Efficiency/Condensing Design - Modulation Down to 20% of Full Fire (5:1 Turndown) - Accepts External Modulation Control - Manual Reset High Limit - 10-Year Limited Warranty/1-Year Parts Warranty - Condensate Neutralization Kit(s) - ASME CSD-1 Compliant: Low Water Cut-Off and High/Low Gas Pressure Switche

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