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Business: Industrial

Purchasing Toolkit - Commercial and Industrial


ENERGY STAR® – Commercial Dishwashers

Criteria for ENERGY STAR Qualified Commercial Dishwashers

Machine Type High Temp Efficiency Requirements Low Temp Efficiency Requirements
Idle Energy Rate* Water Consumption Idle Energy Rate* Water Consumption
Under Counter <= 0.90 kW <= 3.8 L/rack <= 0.5 kW <= 6.4 L/rack
Stationary Single Tank Door** <= 1.0 kW <= 3.6 L/rack <= 0.6 kW <= 4.5 L/rack
Single Tank Conveyor <= 2.0 kW <= 2.7 L/rack <= 1.6 kW <= 3.0 L/rack
Multiple Tank Conveyor <= 2.6 kW <= 2.0 L/rack <= 2.0 kW <= 2.0 L/rack
*Idle energy rate as measured with door closed and rounded to 2 significant digits.
**Includes pot, pan and utensil machines.

Note: Machines designed to be interchangeable in the field from high temp to low temp, and vice versa, must meet both the high temp and low temp requirements above to qualify as ENERGY STAR.

Cost Savings for ENERGY STAR Qualified Commercial Dishwashers

Below is a comparison of ENERGY STAR versus non-ENERGY STAR qualified products, based on the ENERGY STAR Simple Savings Calculator, Version 6.0. The calculator allows users to quantify expected energy and cost savings and estimate greenhouse gas emission reductions. This information can be used in business cases comparing ENERGY STAR qualified products and non-qualified products.

Cost-Savings Example
Equipment 10 Under Counter, High Temperature Commercial Dishwashers (10 year life)
ENERGY STAR Non-ENERGY STAR
Annual Lifetime Annual Lifetime
Energy Consumption (kWh) 98,727 987,273 172,124 1,721,243
Energy Cost
(@ 11,6¢/kWh)
$12,516 $83,984 $21,821 $146,421
Water Consumption (m³) 1,026 10,260 2,024 20,237
Water Cost
(@ $2.20/m³)
$2,260 $15,166 $4,458 $29,913
Maintenance Cost $0 $0 $0 $0
Total Operating Cost $14,776 $99,150 $26,279 $176,334
Purchase Price   $60,000   $50,000
Total Life-cycle Cost   $159,150   $226,334
Total Energy Savings (kWh) 73,397 733,970    
Total Water Savings (m³) 998 9,977    
Total Energy, Water and Maintenance Cost Savings $11,503 $77,184    
Emissions savings
(kg CO2)
14,679 146,794    
Payback Period 0.9 years (based on initial purchase price of $5,000 per non-qualified unit and $6,000 per ENERGY STAR qualified unit)

The emissions savings resulting from purchasing 10 ENERGY STAR qualified under counter, high temperature commercial dishwashers, instead of 10 non-qualified units, are equivalent to:

  • planting 1,439 trees.
  • removing 4 cars from the road annually.

Note: In addition to the ENERGY STAR Simple Savings Calculator, the Food Service Technology Center (administered by Pacific Gas and Electric Company in California) provides a free "Life-Cycle and Energy Cost Calculator" that automates the calculation of annual and life-cycle costs of a wide range of commercial cooking equipment, including commercial hot food holding cabinets.

Sample Procurement Language for ENERGY STAR Qualified Commercial Dishwashers

You may wish to use the following procurement language in contracts to ensure you receive ENERGY STAR qualified commercial dishwashers. As with all purchases, be sure to ask the appropriate questions to ensure that you get exactly what you want.

The vendor must

  • Verify that the model has been qualified to bear the ENERGY STAR symbol by a manufacturer participating in the ENERGY STAR initiative.
  • Provide commercial dishwashers that earn the ENERGY STAR qualification and meet the ENERGY STAR specifications for energy efficiency.
  • Ensure that ENERGY STAR qualified products meet user requirements for performance, reliability and cost-effectiveness.

For bulk purchases and/or lease/maintenance agreements, include the provisions that - where applicable - the vendor must

  • Deliver all qualified products properly configured for current ENERGY STAR specifications.
  • Ensure that installation services include the full activation and proper configuration of any automatic energy-saving, power-down and/or power management features in order to maximize energy efficiency.
  • Ensure that maintenance services include the full re-activation and proper re-configuration of any automatic energy-saving, power-down and/or power management features to the terms of the current ENERGY STAR specifications at the time of service.
  • Customize sites and train users in order to maximize the energy efficiency of installed products.
  • Not disable power-management features except at the specific request of site staff.
  • Provide on-going customer support on all energy-saving, power-down and power management features.

Information Resources on Commercial Dishwashers

List of Models

Canada and the United States share ENERGY STAR qualified product lists.

On-line and downloadable lists of qualified models include the following information:

  1. Company Name
  2. Brand Name
  3. Model Name/Number
  4. Machine Type
  5. Sanitation Method (high and/or low temp)
  6. Idle Energy Rate (kW)
  7. Water Consumption (GPR)
  8. Date Available on Market

How to Access

List of models : Commercial Dishwashers U.S.

Product specifications for Commercial Dishwashers are available on the ENERGY STAR website.

Original Data Source

Data supplied to NRCan and EPA by participating manufacturers.  Manufacturers are required to perform tests and self-certify those product models that meet the ENERGY STAR guidelines.

Update Frequency

ENERGY STAR criteria are updated as required.

The list of qualified models on the ENERGY STAR website is updated as manufacturers report new information.

Definitions

Dishwashing Machine – A machine designed to clean and sanitize plates, glasses, cups, bowls, utensils, and trays by applying sprays or detergent solution (with or without blasting media granules) and a sanitizing final rinse.

Under Counter Dishwasher – A machine with an overall height 38 inches (96.5 cm) or less, in which a rack of dishes remains stationary within the machine while being subjected to sequential wash and rinse sprays, and is designed to be installed under food preparation workspaces. Under counter dishwashers can be either chemical or hot water sanitizing, with an internal booster heater for the latter. For purposes of this specification, only those machines designed for wash cycles of 10 minutes or less can qualify for ENERGY STAR.

Stationary Rack, Single Tank, Door Type Dishwasher – A machine in which a rack of dishes remains stationary within the machine while subjected to sequential wash and rinse sprays. This definition also applies to machines in which the rack revolves on an axis during the wash and rinse cycles. Subcategories of stationary door type machines include: single and multiple wash tank, double rack, pot, pan and utensil washers, chemical dump type and hooded wash compartment ("hood type"). Stationary rack, single tank, door type models are covered by this specification and can be either chemical or hot water sanitizing, with an internal or external booster heater for the latter.

Single Tank Conveyor Dishwasher – A warewashing machine that employs a conveyor or similar mechanism to carry dishes through a series of wash and rinse sprays within the machine. Specifically, a single tank conveyor machine has a tank for wash water followed by a final sanitizing rinse and does not have a pumped rinse tank. This type of machine may include a prewashing section before the washing section. Single tank conveyor dishwashers can be either chemical or hot water sanitizing, with an internal or external booster heater for the latter.

Multiple Tank Conveyor Dishwasher – A conveyor type machine that has one or more tanks for wash water and one or more tanks for pumped rinse water, followed by a final sanitizing rinse. This type of machine may include one or more pre-washing sections before the washing section. Multiple tank conveyor dishwashers can be either chemical or hot water sanitizing, with an internal or external booster heater for the latter.

Hot Water Sanitizing (High Temp) Machine – A warewashing machine that applies potable hot water to the surfaces of wares to achieve sanitization.

Chemical Sanitizing (Low Temp) Machine – A warewashing machine that applies potable water and a chemical sanitizing solution to the surfaces of wares to achieve sanitization.

Test Standards

Water Consumption:

  • NSF/ANSI 3-2007 Standard, Commercial Warewashing Equipment. (Note: All machines must be certified by a third party laboratory).

Idle Energy Rate for Hot Water and Chemical Sanitizing Undercounter and Stationary Rack Single Tank Door-Type Dishwashers:

  • ASTM Standard F1696, Standard Test Method for Energy Performance of Single-Rack Hot Water Sanitizing, Door-Type Commercial Dishwashing Machines.

Idle Energy Rate for Hot Water and Chemical Sanitizing Single and Multiple Tank Rack Conveyor Dishwashers:

  • ASTM Standard F1920, Standard Test Method for Energy Performance of Rack Conveyor, Hot Water Sanitizing, Commercial Dishwashing Machines.
Product Specification Summary
Name of current specification ENERGY STAR Qualifying Criteria for Commercial Dishwashers
Effective date of current
specification
October 11, 2007
Notes on future updates ASTM Test Standard Review:  ENERGY STAR plans to revisit this specification once the revision process for ASTM F1696 and ASTM F1920 are complete.  These test methods will address energy consumption in various modes of operation as well as water consumption.

Review of Idle Energy Requirements:  Within two years of this specification becoming effective, ENERGY STAR will review idle energy data to determine whether the limits provided in Table 1 provide for sufficient differentiation in the marketplace.  If it is determined that revisions are needed, EPA will work closely with industry stakeholders to develop appropriate new levels.

Reminder: Always check the ENERGY STAR website to ensure you have the most current product specifications and other program information.

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