Publish your products
Bock optiTHERM® Modulating Condensing Gas Water Heaters - 600,000 - 900,000 BTU/hr Series

Bock optiTHERM® Modulating Condensing Gas Water Heaters - 600,000 - 900,000 BTU/hr Series

High BTU Instantaneous Modulating Condensing Commercial Water Heaters

Five-Year Limited Tank/Heat Exchanger Warranty


OptiTHERM® for Optimal Thermal Efficiency:

  • 600/700/800/900,000 BTU Inputs
  • 130 gallon tank
  • Extremely efficient
    • 99% at Low Fire
    • 96% at High Fire
  • New Touch Screen Controls for ease of operation
  • Fits through a 36-inch door
  • Front intake/exhaust for zero rear clearance
  • BACnet/BMS/BOCK Net Remote Access
  • Manual reset high limit (field testable)/High-Low Gas Pressure Switches/Optional Low Water Cutoff
  • Automatic cathodic corrosion protection system
    • No sacrificial anode rods
  • PVC/CPVC/ABS venting - 240' maximum power vent length
  • Glass-fused-to-steel water tank and heat exchanger
  • SCAQMD certified Ultra-Low NOx
  • Natural gas or propane fuel
  • Stealth Quiet™ operation
  • Built-in pallet jack openings and lifting lugs

Turboflue® High Performance Heat Exchanger:

  • Patented helical-fin multi-stage design
  • Superior heat conduction and fuel efficiency

Made in the USA

  • Brand/DescriptionOptiTHERM (High Eff Condense)
    Fuel TypeNatural Gas
    Thermal Efficiency96-99% (High Eff Condense)
    Capacity (gal)130 gallon
    ASME CertificationYes
    CUL ListedYes
    CEC ListedYes
    EmissionsUltra Low NOx
    Outdoor Certified-OptiTHERM<br>(Only order if in CA or AZ)No
    Altitude (Select For OptiTHERM)0-2,000 ft. (Opti Std. Models)
    Modulating (High Eff Condense)Yes
    Warranty5-Year Limited Tank/Heat Exchanger
Technical specification
  • Unique ref.optiTHERM-Modulating-Condensing-Gas-Water-Heater-600-900
  • Product familyStorage Water Heaters
  • Product groupoptiTHERM®
  • TypeObject (single object)
  • Date of publishing2022-03-28
  • Edition number1
  • Designed inUnited States
  • Manufactured inUnited States
  • BIMobject CategoryHVAC - Water heaters
  • UNSPSC nameCommercial water heaters
  • UNSPSC code40101826
  • Uniclass 2015 CodePr_60_60_96_34
  • Uniclass 2015 DescriptionGas-fired storage water heaters
  • CSI MasterFormat 2014 Code22 34 36
  • CSI MasterFormat 2014 TitleCommercial Gas Domestic Water Heaters
  • OmniClass Number23-31 29 00
  • OmniClass TitleHot Water Heaters

Region availability

North America
United States