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.

Items 1-9 of 36

Page
per page
Set Descending Direction

Items 1-9 of 36

Page
per page
Set Descending Direction
Shop By
  1. OT125N-H25
    OptiTHERM 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 listed
    Model: OT125N-H25
    SKU: 55820
    View Product
  2. OT150N-H25
    OptiTHERM 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 listed
    Model: OT150N-H25
    SKU: 55822
    View Product
  3. OT199N-H25
    OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 199,000 BTU/hr • Natural Gas • NSF/ANSI certified • CUL listed
    Model: OT199N-H25
    SKU: 55825
    View Product
  4. OT125LP-H25
    OptiTHERM 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 listed
    Model: OT125LP-H25
    SKU: 55840
    View Product
  5. OT150LP-H25
    OptiTHERM 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 listed
    Model: OT150LP-H25
    SKU: 55842
    View Product
  6. OT199LP-H25
    OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 99 gallon • 199,000 BTU/hr • LP Gas • NSF/ANSI certified • CUL listed
    Model: OT199LP-H25
    SKU: 55845
    View Product
  7. OT200LP-H25
    OptiTHERM modulating, condensing high-efficiency commercial water heater • Altitude above 2,000 ft to 5,400 ft. max. • 100 gallon • 199,999 BTU/hr • LP Gas • NSF/ANSI certified • CUL listed
    Model: OT200LP-H25
    SKU: 55787
    View Product
  8. OT250LP-H25
    OptiTHERM 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 listed
    Model: OT250LP-H25
    SKU: 55790
    View Product
  9. OT299LP-H25
    OptiTHERM 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 listed
    Model: OT299LP-H25
    SKU: 55792
    View Product