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

• Maximum inputs from 125,000 to 500,000 BTU/hr.
• 99/100/125 gallon capacities
• Natural gas
• SCAQMD certified Ultra-Low NOx

Model: OT500N
SKU: 55687

NOTE: This is the OptiTHERM Base Model. When ordering, you need to specify Nat/LP, ASME,Altitude Required