Bock optiTHERM® Modulating Condensing Gas Water Heaters - 125,000 - 250,000 BTU/hr Series

Modulating Condensing Commercial Water Heaters

Up to 99% Thermal Efficiency by Modulating Fuel Input to Supply Variable Domestic Hot Water Demand

Five-Year Limited Tank/Heat Exchanger Warranty 

- THE INDUSTRY'S FINEST

OptiTherm® for Optimal Thermal Efficiency:

• Maximum inputs from 125,000 to 250,000 BTU/hr
  • Fully modulating from as low as 40,000 BTU/hr
• 100 gallon capacity
• Up to 99% thermal efficiency
• ASME models available
• Automatic cathodic corrosion protection system
  • No sacrificial anode rods
• PVC/CPVC/ABS venting - 270' maximum power vent length
  • 2"/3"/4" piping
• LCD user interface with optional BMS interface
• Ecomate® insulation
• Glass-fused-to-steel water tank and heat exchanger
• SCAQMD certified Ultra-Low NOx
• Natural gas or propane fuel
• Stealth Quiet™ operation
• Fits through a 36-inch door
• Concentric vent kit available

Turboflue® High Performance Heat Exchanger:

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