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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OT250NOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT250NBTU: 250,000 (73.26)Gal: 100 gallonSKU: 55745 -
OT299NOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 299,999 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT299NBTU: 299,999 (87.9)Gal: 100 gallonSKU: 55747
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OT250N-H28OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 7,800 ft. max. • 100 gallon • 250,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT250N-H28BTU: 250,000 (73.26)Gal: 100 gallonSKU: 55760
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OT299N-H28OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 7,800 ft. max. • 100 gallon • 299,999 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT299N-H28BTU: 299,999 (87.9)Gal: 100 gallonSKU: 55762
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OT250LPOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT250LPBTU: 250,000 (73.26)Gal: 100 gallonSKU: 55775
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OT299LPOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 299,999 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT299LPBTU: 299,999 (87.9)Gal: 100 gallonSKU: 55777
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OT250LP-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 100 gallon • 250,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT250LP-H25BTU: 250,000 (73.26)Gal: 100 gallonSKU: 55790
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OT250LP-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 100 gallon • 250,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT250LP-H58BTU: 250,000 (73.26)Gal: 100 gallonSKU: 55791
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OT299LP-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 100 gallon • 299,999 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT299LP-H58BTU: 299,999 (87.9)Gal: 100 gallonSKU: 55793
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OT299LP-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 100 gallon • 299,999 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT299LP-H25BTU: 299,999 (87.9)Gal: 100 gallonSKU: 55792
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OT250N-AOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listedView ProductModel: OT250N-ABTU: 250,000 (73.26)Gal: 100 gallonSKU: 55737
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OT299N-AOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 299,999 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listedView ProductModel: OT299N-ABTU: 299,999 (87.9)Gal: 100 gallonSKU: 55740
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OT250N-A-H28OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 7,800 ft. max. • 100 gallon • 250,000 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listedView ProductModel: OT250N-A-H28BTU: 250,000 (73.26)Gal: 100 gallonSKU: 55752
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OT299N-A-H28OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 7,800 ft. max. • 100 gallon • 299,999 BTU/hr • Natural Gas • ASME certified • NSF/ANSI certified • CUL listedView ProductModel: OT299N-A-H28BTU: 299,999 (87.9)Gal: 100 gallonSKU: 55755
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OT250LP-AOptiTHERM modulating, condensing high-efficiency commercial water heater • 100 gallon • 250,000 BTU/hr • LP Gas • ASME certified • NSF/ANSI certified • CUL listedView ProductModel: OT250LP-ABTU: 250,000 (73.26)Gal: 100 gallonSKU: 55767