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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EZ 75-76NEZFIT ATMOSPHERIC NATURAL GAS WATER HEATERView ProductModel: EZ 75-76NBTU: 76,000 (22.27)Gal: 75 gallonSKU: 55602 -
OT125NOptiTHERM modulating, condensing high-efficiency commercial water heater • 99 gallon • 125,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125NBTU: 125,000 (36.63)Gal: 99 gallonSKU: 55800 -
OT150NOptiTHERM modulating, condensing high-efficiency commercial water heater • 99 gallon • 150,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150NBTU: 150,000 (43.96)Gal: 99 gallonSKU: 55802
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OT125N-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 125,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125N-H25BTU: 125,000 (36.63)Gal: 99 gallonSKU: 55820
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OT150N-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 150,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150N-H25BTU: 150,000 (43.96)Gal: 99 gallonSKU: 55822
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OT125N-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 99 gallon • 125,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125N-H58BTU: 125,000 (36.63)Gal: 99 gallonSKU: 55830
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OT150N-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 99 gallon • 150,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150N-H58BTU: 150,000 (43.96)Gal: 99 gallonSKU: 55832
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OT125LPOptiTHERM modulating, condensing high-efficiency commercial water heater • 99 gallon • 125,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125LPBTU: 125,000 (36.63)Gal: 99 gallonSKU: 55810
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OT150LPOptiTHERM modulating, condensing high-efficiency commercial water heater • 99 gallon • 150,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150LPBTU: 150,000 (43.96)Gal: 99 gallonSKU: 55812
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OT125LP-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 125,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125LP-H25BTU: 125,000 (36.63)Gal: 99 gallonSKU: 55840
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OT150LP-H25OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 150,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150LP-H25BTU: 150,000 (43.96)Gal: 99 gallonSKU: 55842
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OT125LP-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 99 gallon • 125,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT125LP-H58BTU: 125,000 (36.63)Gal: 99 gallonSKU: 55850
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OT150LP-H58OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 5,400 ft to 7,800 ft. max. • 99 gallon • 150,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listedView ProductModel: OT150LP-H58BTU: 150,000 (43.96)Gal: 99 gallonSKU: 55852
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ODOT125N-H25OptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • Altitudes above 2,000 ft to 5,400 ft max • 99 gallon • 125,000 BTU/hr • Natural Gas • NSF/ANSI certifiedView ProductModel: ODOT125N-H25BTU: 125,000 (36.63)Gal: 99 gallonSKU: 55924 -
ODOT150NOptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • 99 gallon • 150,000 BTU/hr • Natural Gas • NSF/ANSI certifiedView ProductModel: ODOT150NBTU: 150,000 (43.96)Gal: 99 gallonSKU: 55910