Gas Water Heaters

Bock is your first choice for all your commercial gas water heater needs. Our industry leading optiTHERM modulating condensing water heaters in sizes up to 500,000 BTU, provide up to 99% thermal efficiency, have an automatic cathodic protection system, LCD user interface and five year warranty.

Our EZ Fit atmospheric water heaters are easy to install and available in Power Direct Vent, Low NOx, Internal Coil and a host of other models.

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Items 10-18 of 25

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Items 10-18 of 25

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  1. 66W-399SDLN-NA
    NON-ASME CONSTRUCTED, NATURAL GAS LO-NOX BURNER WITH SPARK DAMPER ENERGY SAVER ATMOSPHERIC WATER HEATER
    Model: 66W-399SDLN-NA
    BTU: 399,999 (117.23)
    Gal: 65 gallon
    SKU: 55373
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  2. 75W-300SDLN-XA
    NON-ASME CONSTRUCTED, L.P. GAS LO-NOX BURNER WITH SPARK DAMPER ENERGY SAVER ATMOSPHERIC WATER HEATER
    Model: 75W-300SDLN-XA
    BTU: 300,000 (87.92)
    Gal: 75 gallon
    SKU: 55362
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  3. 66W-370SDLN-XA
    NON-ASME CONSTRUCTED, L.P. GAS LO-NOX BURNER WITH SPARK DAMPER ENERGY SAVER ATMOSPHERIC WATER HEATER
    Model: 66W-370SDLN-XA
    BTU: 370,000 (108.44)
    Gal: 65 gallon
    SKU: 55370
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  4. 80W-505SD-NA
    NON-ASME CONSTRUCTED, NATURAL GAS BURNER WITH SPARK DAMPER ENERGY SAVER ATMOSPHERIC WATER HEATER
    Model: 80W-505SD-NA
    BTU: 505,000 (148.00)
    Gal: 80 gallon
    SKU: 55160
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  5. OT300N2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 300,000 BTU/hr. Natural Gas. NSF/ANSI Certified. UL Listed
    Model: OT300N2
    BTU: 300,000 (87.92)
    Gal: 119 gallon
    SKU: 55667-2
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  6. OT400N2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 400,000 BTU/hr. Natural Gas. NSF/ANSI Certified. UL Listed
    Model: OT400N2
    BTU: 400,000 (117.23)
    Gal: 119 gallon
    SKU: 55670-2
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  7. OT500N2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 500,000 BTU/hr. Natural Gas. NSF/ANSI Certified. UL Listed
    Model: OT500N2
    BTU: 500,000 (146.50)
    Gal: 119 gallon
    SKU: 55672-2
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  8. OT300N2-H28
    OptiTherm modulating condensing high effeciency commercial water heater. Altitudes above 2,000 to 7,800 ft max. 119 gallons. 300,000 BTU/hr. Natural Gas. NSF/ANSI Certified. UL Listed
    Model: OT300N2-H28
    BTU: 300,000 (87.92)
    Gal: 119 gallon
    SKU: 55682-2
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  9. OT400N2-H28
    OptiTherm modulating condensing high effeciency commercial water heater. Altitudes above 2,000 to 7,800 ft max. 119 gallons. 400,000 BTU/hr. Natural Gas. NSF/ANSI Certified. UL Listed
    Model: OT400N2-H28
    BTU: 400,000 (117.23)
    Gal: 119 gallon
    SKU: 55685-2
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