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.

Shop By

Items 28-36 of 49

per page
Set Descending Direction

Items 28-36 of 49

per page
Set Descending Direction
  1. ODOT250LP-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 • LP Gas • ASME certified • NSF/ANSI certified
    Model: ODOT250LP-A
    BTU: 250,000 (73.26)
    Gal: 100 gallon
    SKU: 55892
    View Product
  2. ODOT299LP-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 • LP Gas • ASME certified • NSF/ANSI certified
    Model: ODOT299LP-A
    BTU: 299,999 (87.9)
    Gal: 100 gallon
    SKU: 55890
    View Product
  3. ODOT125N
    OptiTHERM Outdoor modulating, condensing high-efficiency commercial water heater • UL Listed for outdoor use in dry, warm climates • 99 gallon • 125,000 BTU/hr • Natural Gas • NSF/ANSI certified
    Model: ODOT125N
    BTU: 125,000 (36.63)
    Gal: 99 gallon
    SKU: 55912
    View Product
  4. 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
    View Product
  5. 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
    View Product
  6. 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
    View Product
  7. OT300LP2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 300,000 BTU/hr. LP Gas. NSF/ANSI Certified. UL Listed
    Model: OT300LP2
    BTU: 300,000 (87.92)
    Gal: 119 gallon
    SKU: 55697-2
    View Product
  8. OT400LP2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 400,000 BTU/hr. LP Gas. NSF/ANSI Certified. UL Listed
    Model: OT400LP2
    BTU: 400,000 (117.23)
    Gal: 119 gallon
    SKU: 55700-2
    View Product
  9. OT500LP2
    OptiTherm modulating condensing high effeciency commercial water heater. 119 gallons. 500,000 BTU/hr. LP Gas. NSF/ANSI Certified. UL Listed
    Model: OT500LP2
    BTU: 500,000 (146.50)
    Gal: 119 gallon
    SKU: 55702-2
    View Product