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Commercial Dishwashers

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UES Measures Standard protocols list Demand Response Technologies Supporting Documents Propose a measure or standard protocol Proposed measures and status Whole Building Efforts

Subcommittees

  • Connected Thermostats
  • Demand Response
  • Duct Sealing
  • Guidelines
  • Heat Pump Water Heaters
  • Implementers Group
  • Natural Gas
  • New Homes
  • Non-Residential Lighting
  • Operations
  • Refrigeration
  • Research and Evaluation
  • Residential HVAC
  • Small and Rural Utilities
  • Whole Building
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UES Measure

  • Commercial Dishwashers

Commercial Dishwashers

At a Glance

Category 
planning
Status 
active
Fuel type 
dual fuel
Sector 
commercial
Applications 
appliances
Sunset date 
Apr 30, 2027

Energy efficient commercial dishwashers save energy relative to less efficient dishwashers by using less hot water to wash wares and utensils. These savings are realized at the building water heater, and calculated for gas, electric resistance and electric heat pump water heaters. Heat pump water heaters may not have sufficient recovery rates for high wash volumes for larger dishwashers, water heater COP was adjusted to assume resistance backup heating based on assumed washing volume for different machines. Heat recovery dishwashers use more electric energy at the machine while reducing energy at the water heater and may be more suitable to be paired with heat pump water heaters.

The RTF's savings estimates use ENERGY STAR test data coupled with field data to estimate annual water and energy savings at the water heater as well as at the machine itself. Energy and water savings are calculated for ENERGY STAR V3.0 qualified machines against ENERGY STAR V2.0 which has been code in Washington and Oregon since 2021. Less efficient baseline is assumed for Idaho and Montana for non-ENERGY STAR undercounter low temp and door type dishwashers which exist on the market. Schools have less days of operation and shorter operation hours and wash less racks than restaurants resulting in lower savings than non-school segments.

 

Workbook

Latest Version

Commercial Dishwashers v2.1

File Commercial Dishwashers v2.1
Approved at Oct 2025 RTF meeting. Undergoing QAQC.
Date 
Oct 23, 2025
Version number 
2.1

Past Versions

version date document
1.2
Oct 24, 2012
File ComDishwasher_v1_2.xlsm
Summary sheet added.
1.1
May 12, 2010
File ComDishwasherFY10v1_1.xls
Original savings workbook.
Supporting Documents
File ComDishwasher_RecommendationMemo.docx

Decisions

Expand All Decisions

Latest decision

Decision details

Decided 
October 21, 2025
RTF Meeting

Approve New Measure

Decision Details

Approve the Commercial Dishwashers UES measure as presented, and:
• Update 90/10 non-condensing/condensing water heaters split
• Adjust school savings shape to reduce June and August operation by half, 180 days total
• Set the Category as Planning
• Set the Status at Active
• Set the sunset date to April 30, 2027

Decided 
December 17, 2024
RTF Meeting

Allocate or Don't Allocate Resources to Developing Potential Measures

Decision Details

Allocate resources to developing the potential measures for​
Heat Pump Engine Block Heaters for Standby Generators​
Commercial Dishwashers​

And that the RTF does not allocate resources to the following:​
Whole House Fans​
Midstream Ductless Heat Pumps
ENERGY STAR Ceiling Fans​​

Decided 
November 19, 2013
RTF Meeting: November 19, 2013

Measure deactivation

Decision Details

Accept staff’s proposed plan to deactivate the UES measure.

Decided 
October 24, 2012
RTF Meeting: October 24, 2012

Set measure to Out of Compliance

Decision Details

Adopt the SBW recommendations for the Commercial Cooking Equipment Energy Efficient Dishwasher measure and change the status to Out of Compliance with a sunset date of November 1, 2013.

RTF staff will work with stakeholders to develop a plan to bring the measure back into compliance with the Guidelines based on the recommendation memo and seek RTF approval of that plan by the sunset date. If a plan is not approved by the RTF by the sunset date, the measure will be deactivated.

Decided 
November 09, 2009
RTF Meeting: November 9, 2009

Approve measure update

Decision Details

Accept the savings with a weighted average calculated in four categories - fuel type (gas and electric) and high and low water temperature, all based on Energy Star data

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