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Internet # 305029259

Model # ES85-12-G 240 Volt 3 Phase

Store SO SKU #1003127330

Commercial Heavy-Duty 85 Gal. 240-Volt 12.3kW 3 Phase Electric Surface Thermostat Tank Water Heater

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  • Use in multifamily, hospitality and institutional facilities
  • For applications with high volume peak demands for hot water
  • Backed by Rheem's 3 year limited warranty
  • View More Details
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Product Details

About This Product

Rheem Commercial Heavy-Duty Electric Water Heaters are suitable for general commercial hot water applications and are also ideal for point-of-use installations. A single unit can be used as a booster heater to satisfy the hot water requirements of commercial dishwashers. A single temperature storage unit, when installed with a mixing valve, will supply two temperatures in food service establishments. Note Product Name for Gal.-Volt-Watt-Phase-Code-Thermostat configuration.


  • System sentinel diagnostics identifies a non-operating element
  • Long life tank design: proprietary steel formulation with high temperature porcelain enamel to maximize corrosion resistance resulting in a superior tank design
  • Minimum distance to combustibles is 0 in. from jacket and 18 in. from access door
  • Control box is located at the front of unit for easy wiring during installation with multiple knockout holes to accommodate a variety of conduit sizes
  • Factory wired 3 phase, approved for field conversion to single phase
  • Screw-in stainless steel elements that resist burn out and corrosion
  • Thick foam insulation for minimal standby heat loss
  • 2 anode rods are installed to ensure long life and corrosion resistance
  • Full port, full flow brass drain valve reduces time to drain and service tank
  • Factory installed temperature and pressure relief valve
  • Call 1-855-400-2552 before noon for same-day installation service in most areas, or visit our Water Heater Installation page for more information.
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 305029259

Model # ES85-12-G 240 Volt 3 Phase

Store SO SKU #1003127330


Dimensions: H 57.688 in, W 34 in, D 34 in




Product Depth (in.)

34 in

Product Height (in.)

57.688 in

Product Width (in.)

34 in

Tank Valve Size (in.)

0 in

Water Connection Size (in.)

1-1/2 in


Amperage (A)

36 A

Application Type


Electricity Phase


Finish Family


First Hour of Delivery (gallons/hr)


Fuel Type


Household Size




Maximum Temperature (F)

190 F

Minimum Temperature (F)

90 F

Nominal Tank Capacity (gallons)

85 gal

Number of Elements


Pack Size


Product Weight (lb.)

340 lb

Recovery Rate at 100F Rise (gallons/hour)


Required Volt Connection

240 volt



Tank Lining Material


Tank Warranty

3 Year

Uniform Energy Factor


Water Connection Location

Side, Top

Water Heater Features

Temperature Pressure Relief Valve

Water Heater Profile


Wattage (watts)

12300 W

Warranty / Certifications

Certifications and Listings

UL Listed

Labor Warranty

No Warranty

Part Warranty

1 Year

Questions & Answers

Q:I would like have this water heater converted to a 1 phase instead of 3 phase at the purchasing? Can you accommodate this.
by|Dec 19, 2023
1 Answer
Answer This Question

A:  Hi Joseph and thank you for your question. Please contact the installer.

by|Dec 19, 2023
    Q:what size is the plumbing out of the heater
    by|Mar 9, 2020
    1 Answer
    Answer This Question

    A:  Thank you for asking, Sparky. Please contact our Commercial Water Heating Department at 1-800-432-8373 (opts 2,1,3). Thank you and have a great day.

    by|Apr 8, 2023
      Q:What is the model # for this unit
      by|Jan 10, 2020
      2 Answers
      Answer This Question

      A:  The model number of this unit is ES120-18-G 240 Volt 3 Phase.

      by|Jan 11, 2020

        A:  Thank you for asking, Pyty. The Model Number for this unit is the ES120-18-G. If you have any further questions, please contact us at 1-800-432-8373 (opt 2,1,3). Thank you and have a great day.

        by|Jan 10, 2020
          Q:are these available at the stores?
          by|Sep 14, 2019
          1 Answer
          Answer This Question

          A:  Thank you for asking. You would need to contact your local Home Depot for availability.

          by|Sep 15, 2019
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