Keystone Boiler

Keystone Condensing Boilers provide powerful solutions for large residential and light commercial applications with 7 models with inputs from 399 to 1200 MBH. These products feature a stainless steel heat exchanger with a thermal efficiency between 95 and 97%. Their compact design minimizes floor space while the cabinet provides easy access to all components. The large user friendly control interface makes set-up easy. The advanced control modulates the boiler with a 5 to 1 turndown ratio. Up to 8 boilers can be joined in a cascade while the control features parallel modulation and boiler rotation to maximize efficiency and service life.

Energy Saving Rebates

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  Stainless Steel Fire Tube Heat Exchanger

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  ASME Certified

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  Thermal Efficiencies Of Up To 97%

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  Turndown Ratios Up To 10:1

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  Compact Footprint

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  Large Color Touch Screen Display

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  Cascade Up To 8 Units For A Capacity Of 4,800 MBH

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  Modbus Protocol Included For BAS Integration

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  Low Nox - 2012 SCAQMC Certified