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The HCG Series High Efficiency Commercial Gas Water Heaters embody all that's great about the American brand. They're designed for outstanding reliability, maximum installation flexibility and, above all, excellent thermal efficiency. In comparison to standard water heaters with only 80% efficiency, they deliver up to 400,000 BTU input and up to 96% efficiency. With their small footprint and top mounted controls, HCG Series units are a natural cost-saving choice for restaurants and other similar applications. ENERGY STAR® Qualified.
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HCG Series High Efficiency Commercial Gas Water Heaters

HCG Series High Efficiency Commercial Gas Water Heaters
HCG Series High Efficiency Commercial Gas Water Heaters

HCG Series High Efficiency Commercial Gas Water Heaters
HCG Series High Efficiency Commercial Gas Water Heaters

HCG Series High Efficiency Commercial Gas Water Heaters
HCG Series High Efficiency Commercial Gas Water Heaters

HCG Series High Efficiency Commercial Gas Water Heaters
HCG Series High Efficiency Commercial Gas Water Heaters

HCG Series High Efficiency Commercial Gas Water Heaters
Manufacturer N/A American® Water Heater Company
Standard Type N/A ASME N/A ASME N/A Non-ASME N/A Non-ASME N/A ASME
Input Power N/A 120000 BTU/hr35 kW N/A 120000 BTU/hr35 kW N/A 120000 BTU/hr35 kW N/A 120000 BTU/hr35 kW N/A 150000 BTU/hr44 kW
Thermal Efficiency N/A 95 %
Approximate Capacity N/A 60 U.S. gal227 L N/A 60 U.S. gal227 L N/A 60 U.S. gal227 L N/A 60 U.S. gal227 L N/A 100 U.S. gal379 L
Maximum Hydrostatic Working Pressure N/A 160 psi
Recovery at 30 ºF Temperature Rise N/A 461 gal/h N/A 461 gal/h N/A 461 gal/h N/A 461 gal/h N/A 576 gal/h
Recovery at 17 ºC Temperature Rise N/A 1744 L/h N/A 1744 L/h N/A 1744 L/h N/A 1744 L/h N/A 2179 L/h
Recovery at 40 ºF Temperature Rise N/A 345 gal/h N/A 345 gal/h N/A 345 gal/h N/A 345 gal/h N/A 432 gal/h
Recovery at 22 ºC Temperature Rise N/A 1308 L/h N/A 1308 L/h N/A 1308 L/h N/A 1308 L/h N/A 1635 L/h
Recovery at 50 ºF Temperature Rise N/A 276 gal/h N/A 276 gal/h N/A 276 gal/h N/A 276 gal/h N/A 345 gal/h
Recovery at 28 ºC Temperature Rise N/A 1046 L/h N/A 1046 L/h N/A 1046 L/h N/A 1046 L/h N/A 1308 L/h
Recovery at 60 ºF Temperature Rise N/A 230 gal/h N/A 230 gal/h N/A 230 gal/h N/A 230 gal/h N/A 288 gal/h
Recovery at 33 ºC Temperature Rise N/A 872 L/h N/A 872 L/h N/A 872 L/h N/A 872 L/h N/A 1090 L/h
Recovery at 70 ºF Temperature Rise N/A 197 gal/h N/A 197 gal/h N/A 197 gal/h N/A 197 gal/h N/A 247 gal/h
Recovery at 39 ºC Temperature Rise N/A 747 L/h N/A 747 L/h N/A 747 L/h N/A 747 L/h N/A 934 L/h
Recovery at 80 ºF Temperature Rise N/A 173 gal/h N/A 173 gal/h N/A 173 gal/h N/A 173 gal/h N/A 216 gal/h
Recovery at 44 ºC Temperature Rise N/A 654 L/h N/A 654 L/h N/A 654 L/h N/A 654 L/h N/A 817 L/h
Recovery at 90 ºF Temperature Rise N/A 154 gal/h N/A 154 gal/h N/A 154 gal/h N/A 154 gal/h N/A 192 gal/h
Recovery at 50 ºC Temperature Rise N/A 581 L/h N/A 581 L/h N/A 581 L/h N/A 581 L/h N/A 726 L/h
Recovery at 100 ºF Temperature Rise N/A 138 gal/h N/A 138 gal/h N/A 138 gal/h N/A 138 gal/h N/A 173 gal/h
Recovery at 56 ºC Temperature Rise N/A 523 L/h N/A 523 L/h N/A 523 L/h N/A 523 L/h N/A 654 L/h
Recovery at 110 ºF Temperature Rise N/A 126 gal/h N/A 126 gal/h N/A 126 gal/h N/A 126 gal/h N/A 157 gal/h
Recovery at 61 ºC Temperature Rise N/A 476 L/h N/A 476 L/h N/A 476 L/h N/A 476 L/h N/A 594 L/h
Recovery at 120 ºF Temperature Rise N/A 115 gal/h N/A 115 gal/h N/A 115 gal/h N/A 115 gal/h N/A 144 gal/h
Recovery at 67 ºC Temperature Rise N/A 436 L/h N/A 436 L/h N/A 436 L/h N/A 436 L/h N/A 545 L/h
Recovery at 130 ºF Temperature Rise N/A 106 gal/h N/A 106 gal/h N/A 106 gal/h N/A 106 gal/h N/A 133 gal/h
Recovery at 72 ºC Temperature Rise N/A 402 L/h N/A 402 L/h N/A 402 L/h N/A 402 L/h N/A 503 L/h
Recovery at 140 ºF Temperature Rise N/A 99 gal/h N/A 99 gal/h N/A 99 gal/h N/A 99 gal/h N/A 123 gal/h
Recovery at 78 ºC Temperature Rise N/A 374 L/h N/A 374 L/h N/A 374 L/h N/A 374 L/h N/A 467 L/h
Schematic N/A
Schematic Drawing for HCG Series High Efficiency Commercial Gas Water Heaters
Dimension A N/A 3 in
Dimension B N/A 27.75 in
Dimension C N/A 6.3 in N/A N/A 6.3 in N/A N/A 6.3 in
Dimension D N/A 35 in N/A N/A 35 in N/A N/A 55.5 in
Dimension E N/A 55.5 in N/A N/A 55.5 in N/A N/A 75.5 in
Dimension F N/A 48 in N/A N/A 48 in N/A N/A 68.5 in
Dimension G N/A 11 in N/A N/A 11 in N/A N/A 11 in
Dimension H N/A 42 in N/A N/A 42 in N/A N/A 63 in
Dimension I N/A 47.5 in N/A N/A 47.5 in N/A N/A 69 in
AC Voltage N/A 120 V
Frequency N/A 60 Hz
Blower Current N/A 2.2 A
Igniter Current N/A 4 A
Standard Approximate Shipping Weight N/A 460 lb N/A 460 lb N/A 460 lb N/A 460 lb N/A 555 lb
ASME Approximate Shipping Weight N/A 490 lb N/A 490 lb N/A 490 lb N/A 490 lb N/A 595 lb
Water Connection N/A
Minimum Supply Natural Gas Line Size (N.P.T.) N/A 1/2 in N/A N/A 1/2 in N/A N/A 3/4 in
Minimum Supply Propane Gas Line Size (N.P.T.) N/A 1/2 in N/A N/A 1/2 in N/A N/A 3/4 in
One 90º Elbows for Maximum 3" Vent Pipe N/A 45 ft13.7 m
Two 90º Elbows for Maximum 3" Vent Pipe N/A 40 ft12.2 m
Three 90º Elbows for Maximum 3" Vent Pipe N/A 35 ft10.7 m
Four 90º Elbows for Maximum 3" Vent Pipe N/A 30 ft9.1 m
One 90º Elbows for Maximum 4" Vent Pipe N/A 115 ft35 m
Two 90º Elbows for Maximum 4" Vent Pipe N/A 110 ft33.5 m
Three 90º Elbows for Maximum 4" Vent Pipe N/A 105 ft32 m
Four 90º Elbows for Maximum 4" Vent Pipe N/A 100 ft30.5 m
Five 90º Elbows for Maximum 4" Vent Pipe N/A 95 ft29 m
Six 90º Elbows for Maximum 4" Vent Pipe N/A 90 ft27.4 m
One 90º Elbows for Maximum 6" Vent Pipe N/A
Two 90º Elbows for Maximum 6" Vent Pipe N/A
Three 90º Elbows for Maximum 6" Vent Pipe N/A
Four 90º Elbows for Maximum 6" Vent Pipe N/A
Five 90º Elbows for Maximum 6" Vent Pipe N/A
Six 90º Elbows for Maximum 6" Vent Pipe N/A
Type N/A Natural Gas N/A Liquid Propane Gas N/A Natural Gas N/A Liquid Propane Gas N/A Natural Gas
Style N/A HCG Series
Size N/A C
Industry Standards N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE/IESNA 90.1 ASME Optional CSA® Certified Energy Star UL® Listed
Features N/A Fully Submerged, Spiral-Shaped Condensing Heat Exchanger
  • Spiral shape coil design maximizes heat transfer, resulting in increased efficiency.
  • Spiral heat exchanger reduces lime scale from forming on water-side surfaces; maintains energy efficiency over time.
All Controls, Including Gas Valve and Combustion Air Blower, Located on Top
  • Provides easy access during installation and service.
  • Protects against high water damage.
  • Protected from dirt and incidental damage.
Advanced Electronic Control System
  • Microprocessor controls all water heater functions including ignition and temperature regulation.
  • Precise temperature control adjustable from 90 ºF to 180 ºF.
  • Large LCD display provides detailed operational and diagnostic information in plain English for ease of operation and service.
Down-Fired Low-NOx Power Burner Design
  • Top-Mounted radial burner ensures optimum combustion efficiency.
Space-Saving Design, with Zero Clearance to Combustibles on Sides and Rear
  • Approved for installation on combustible flooring.
Powered Anodes (Standard on All Models)
  • Provide superior long-lasting tank protection.
  • Protects tank in varying water conditions.
Standard Power Vent or Power Direct Vent Flexibility
  • Vertical or sidewall power-venting.
  • Vertical or sidewall powered-direct vent draws all combustion air from outside the building.
  • Vents using inexpensive PVC, ABS or CPVC pipe.
  • Air intake and vent runs can be up to 120 equivalent feet.
CSA Certified and ASME Rated T&P Relief Valve
ASME Construction
  • Optional on all models.
Other Features N/A Commercial Grade Glasslined Tank & Heat Exchanger
  • Heat exchanger glassed internally and externally to provide long term protection against corrosive flue gases and condensate.
Code Compliance
  • Complies with SCAQMD Rule 1146.2 and other Air Quality Management Districts with similar requirements.
  • The 120 - 250K BTU models are design-certified by CSA® International, according to ANSI Z21.10.3 - CSA® 4.3 standards governing storage-type water heaters.
  • The 300 & 400K BTU models are design-certified by Underwriter's Laboratories (UL), Inc., according to ANSI Z21.10.3 - CSA® 4.3 standards governing storage-type water heaters.
  • Design-certified by Underwriter's Laboratories (UL), Inc. to NSF Standard 5.
  • Meets the thermal efficiency and standby loss requirements of the U. S. Department of Energy and current edition of ASHRAE/IESNA 90.1.
Handhole Cleanout
  • For easy inspection and cleaning.
Warranty N/A
  • 3-Year Limited Tank Warranty.
General Information N/A Installation Considerations
  1. Noise - Vent terminal should be located away from bedroom windows or other areas where blower noise will be objectionable. Avoid venting into corners or confined areas, which will amplify sound. Anchoring intake or vent pipe to walls or ceilings can cause noise to be transmitted to living areas, and isolation mounts should be used where anchoring is required.
  2. Air Intake - In cold climates, air intake should be located at least four feet from the vent termination of the water heater and any other appliance vents that discharge moisture-laden air (such as clothes dryers). This will help prevent freeze-over of the intake screen required to prevent foreign objects from entering the intake pipe. Air intake should be located above the maximum snowline.
  3. Vent Termination - Exhaust gases of this water heater are less than 140ºF. In cold climates water vapor in flue gases will condense into a cloud of vapor where the vent exits the building. This vapor can gradually discolor exterior building surfaces. Vent termination should be located where this vapor cloud and potential discoloration are not a concern. Extending the vent termination up to 6" from the wall helps vapor from being trapped along a building's face. To avoid this problem, the vent can be terminated on the roof. Always locate vent termination above the maximum snowline, and do not locate vent termination above a walkway.
  4. Blockage Sensors - The water heater is equipped with sensors to shut it down if blockage of vent or air intake occurs. The water heater control system will display detailed diagnostic information on the LCD screen to help service technicians quickly locate and correct the problem.
  5. Condensate Drain - This is a fully condensing water heater and should be located near a drain to permit proper disposal of condensate.
  6. Optional Concentric Vent Kit - Helps to minimize unsightly wall/roof penetrations.
    HCG3-60T120 THRU 130T300 vent kit p/n 9006328005
    HCG3-130T400 vent kit p/n 9006144005
Note N/A Recovery capacities are based on heater performance at 95% and 96% thermal efficiency.

For complete information on limited warranties, consult written warranty.

Maximum gas supply pressure for 10.5" W.C. natural gas 14" propane gas.

Manifold pressure: 4" W.C. natural gas 10" W.C. propane.

Maximum number of 90º elbows allowed for the vent (exhaust) pipe is four (4) when installing 3 inch pipe and six (6) when installing 4 inch pipe. Maximum number of 90º elbows allowed for intake air pipe is four (4) when installing 3 inch pipe and six (6) when installing 4 inch pipe. Two (2) 45º elbows equal one (1) 90º elbow.

Electrical requirements: 120 VAC/60 HZ, Blower 2.2 Amps FL, Igniter 4.0 Amps.

Center line of water outlet on top of water heaters is approximately 7 inches from the front edge of the water heater