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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  1. OT200N-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 199,999 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT200N-A
    BTU: 199,999 (58.58)
    Gal: 100 gallon
    SKU: 55735
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  2. OT250N-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT250N-A
    BTU: 250,000 (73.26)
    Gal: 100 gallon
    SKU: 55737
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  3. OT299N-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 299,999 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT299N-A
    BTU: 299,999 (87.9)
    Gal: 100 gallon
    SKU: 55740
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  4. OT200LP-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 199,999 BTU/hr • LP Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT200LP-A
    BTU: 199,999 (58.58)
    Gal: 100 gallon
    SKU: 55765
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  5. OT250LP-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • LP Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT250LP-A
    BTU: 250,000 (73.26)
    Gal: 100 gallon
    SKU: 55767
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  6. OT299LP-A
    OptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 299,999 BTU/hr • LP Gas • ASME certified • NSF/ANSI certified • CUL listed
    Model: OT299LP-A
    BTU: 299,999 (87.9)
    Gal: 100 gallon
    SKU: 55770
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  7. ODOT200N-A
    OptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • 100 gallon • 199,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified
    Model: ODOT200N-A
    BTU: 199,999 (58.58)
    Gal: 100 gallon
    SKU: 55888
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  8. ODOT250N-A
    OptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • 100 gallon • 250,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified
    Model: ODOT250N-A
    BTU: 250,000 (73.26)
    Gal: 100 gallon
    SKU: 55886
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  9. ODOT299N-A
    OptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • 100 gallon • 299,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified
    Model: ODOT299N-A
    BTU: 299,999 (87.9)
    Gal: 100 gallon
    SKU: 55884
    View Product