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.

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    • Stainless Steel Fire Tube Heat Exchanger

    • ASME Certified

    • Thermal Efficiencies Of Up To 97%

    • Turndown Ratios Up To 10:1

    • Compact Footprint

    • Large Color Touch Screen Display

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

    • Modbus Protocol Included For BAS Integration

    • Low Nox - 2012 SCAQMC Certified

    Accessories Accessories

    • PSVTERM05

      4" PVC Sidewall Termination Kit

    • PTCON22

      ProtoNode BMS, CACnet®, Modbus

    • PTCON23

      ProtoNode BMS LonWorks®

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    Model Comparison Model Comparison

    Keystone Boiler39950060075085010001200

    • Model Number
    • KS 399 T
    • KS 500 T
    • KS 600 T
    • KS 750 T
    • KS 850 T
    • KS 1000 T
    • KS 1200 T

    Performance Specs

    • Fuel
    • NP
    • NP
    • NP
    • NP
    • NP
    • NP
    • NP
    • Input MBH
    • 80-399
    • 100-500
    • 1220-600
    • 150-750
    • 170-850
    • 100-1,000
    • 120-1,200
    • Thermal Efficiency %
    • 96.5%
    • 95.0%
    • 95.3%
    • 96.6%
    • 95.7%
    • 94.2%
    • 95.1%
    • Combustion Efficiency %
    • 96.5%
    • 95.0%
    • 96.0%
    • 96.6%
    • 95.7%
    • 94.2%
    • 94.8%
    • DOE Heating Capacity
    • 386
    • 475
    • 572
    • 724
    • 813
    • 942
    • 1120
    • Turndown Ratio
    • 5:1
    • 5:1
    • 5:1
    • 5:1
    • 5:1
    • 10:1
    • 10:1
    • Net AHRI Rating MBH
    • 336
    • 413
    • 497
    • 630
    • 707
    • 819
    • 974

    DocumentsDocuments

    Product / Marketing Literature

    Installation / User Manuals

    Specifications

    • Keystone Boiler - KS-399-500 Suggested Specifications
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    • Keystone Boiler - KS-600-750-850 Suggested Specifications
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    KEYSTONE BOILER

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