The American Standard® Commercial Gas Model D-100-270-AS is designed to deliver large quantities of hot water economically through utilization of the most energy-saving techniques. Customary applications include industrial buildings, motels, hotels, schools, hospitals, restaurants, laundromats, car washes and multi-family developments up to eighteen single or thirteen double bath units.
Unit of Measure



N/A American Standard®

Tank Capacity

N/A 100 gal

Input Power

N/A 270000 BTU


N/A Liquid Propane Gas

Thermal Efficiency

N/A 80 %



Test Pressure

N/A 300 psi

Working Pressure

N/A 150 psi

Industry Standards

N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE Standards 90.1-1999 NSF



Schematic Drawing for Model D-100-270-AS 100 Gallon (gal) Heavy Duty Storage Direct Spark Ignition Dampered Commercial Gas Water Heaters

Exterior Dimension A

N/A 73-5/8 in

Exterior Dimension B

N/A 30-1/4 in

Exterior Dimension C

N/A 65-5/8 in

Vent Size

N/A 6 in

Top Pipe Size

N/A 1-1/2 in

Rear and Front Water Connection

N/A 2 in

Height to Top Water I.P.S. Connection D

N/A 67-5/8 in

Top Spread Water I.P.S. Connection E

N/A 23-5/8 in

Height to Rear and Front Hot Water I.P.S. Connection F

N/A 57-1/2 in

Height to Rear and Front Cold Water I.P.S. Connection G

N/A 20 in

Gas I.P.S. Connection Height H

N/A 4-3/4 in

Gas I.P.S. Connection Size

N/A 3/4 in

Height to T and P Opening J

N/A 58-7/8 in

T and P Opening

N/A 1 in

Maximum Recovery

Recovery at 40 ºF Temperature Rise

N/A 655 gal/h

Recovery at 50 ºF Temperature Rise

N/A 524 gal/h

Recovery at 60 ºF Temperature Rise

N/A 436 gal/h

Recovery at 70 ºF Temperature Rise

N/A 374 gal/h

Recovery at 80 ºF Temperature Rise

N/A 327 gal/h

Recovery at 90 ºF Temperature Rise

N/A 291 gal/h

Recovery at 100 ºF Temperature Rise

N/A 262 gal/h

Recovery at 110 ºF Temperature Rise

N/A 238 gal/h

Recovery at 120 ºF Temperature Rise

N/A 218 gal/h

Recovery at 130 ºF Temperature Rise

N/A 201 gal/h

Recovery at 140 ºF Temperature Rise

N/A 187 gal/h

Maximum Hot Water Delivery

Storage Capacity

N/A 100 U.S. gal

One Hour Recovery at 100 ºF Temperature Rise

N/A 262 gal/h

Maximum Hot Water Delivery (1 Hour)

N/A 332 L

Maximum Hot Water Delivery (2 Hours)

N/A 594 L

Maximum Hot Water Delivery (3 Hours)

N/A 856 L

Maximum Hot Water Delivery Recovery at 100 ºF Temperature Rise

N/A 4.4 g/min

Electrical Characteristics

AC Voltage

N/A 120 V


N/A 60 Hz


N/A <5 A

Testing and Certifications

Testing and Certifications

  • American Standard® gas water heaters are certified at 300 PSI test pressure and for 150 PSI working pressure
  • Tested and listed with CSA® International in accordance with ANZI Z21.10.3 - CSA® 4.3 for up to 180 ºF operation as an automatic storage and/or automatic circulating tank heater, meets ASHRAE 90.1-1999



  • Heavy Gauge Steel Tank incorporating only seven internal flue tubes resulting in fewer critical welds to yield added years of trouble-free service.
  • ASME Construction Model available.
  • Inner tank glass-lined with Dura-Glas™ and fired at 1600 ºF for optimum protection from the effects of corrosion.
  • R-8.3 non-CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.
  • Four anode rods to ensure maximum tank life.
  • Self-Cleaning turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.
  • Full size hand-hole cleanout for eased tank inspection and/or removal of sediment deposits.
  • Electronic direct-spark ignition system saves fuel by eliminating the need for standby gas pilot.
  • Automatic motorized flue damper reduces tank heat loss during standby periods for lowest operating costs.
  • Fully adjustable 24-volt controls provide temperature settings to 180 ºF. When installed with a mixing valve, the D-100-270-AS can deliver 180 ºF sanitizing and 140 ºF general purpose hot water simultaneously.
  • Factory installed energy cut-off system and pressure/temperature valve.
  • Top 1-1/2", 2" rear and 2" front water connections for universal replacements, connection to circulating lines and eased multiple heater or storage tank installations. CSA® certified to meet NSF/ANSI 5 Standards.



  • 3-Year Limited Warranty - On Inner Glass-Lined Tank.
  • 1-Year Limited Warranty - On all Other Component Parts.



N/A This water heater meets the requirements of ASHRAE 90.1-1999 and meets or exceeds the thermal efficiency and standby loss requirements of california and other states recognizing ASHRAE.

Recovery rate indicated on heater rating plate is based on 75% (76%) thermal efficiency according to CSA (ANSI, Z.21.10.3). Manufacturer reserves the right to make product changes and/or improvements with or without notice.