Retro-Commissioning Services

Retro-Commissioning Services

Retro-commissioning (RCx) is a systematic process to improve an existing building’s performance. Using a whole-building systems approach, RCx seeks to identify operational improvements that will increase occupant comfort and save energy. Grumman/Butkus Associates (G/BA) is a leader in the RCx industry and has been providing RCx services for the past 15 years on a diverse array of projects.

Over a three-year period, G/BA successfully completed 25 retro-commissioning projects, resulting in:

  • A total energy cost savings of $2.64 million
  • An annual electricity savings of 19 million kWh
  • An annual natural gas savings of 1 million therms

G/BA is a qualified retro-commissioning service provider under these programs:

  • ComEd’s Energy Efficiency Program (now partnered with Peoples Gas, North Shore Gas, and NICOR)
  • Illinois Department of Commerce and Economic Opportunity’s (DCEO’s) RCx program, which is run through the Smart Energy Design Assistance Center (SEDAC)
  • Ameren’s ActOnEnergy® program in Central and Southern Illinois
  • Indiana Michigan Power’s Retro-Commissioning Lite program in Northern Indiana
  • In 2011 and 2012, G/BA was ranked No. 1 among service providers in the ComEd RCx program, with a perfect score for “percent of savings goals” and “cost effectiveness.”

Retro-commissioning process

The process involved in retro-commissioning (RCx) services is as follows:

  • Application
    • Prepare application for outside funding when available
  • Planning
    • Initial site assessment
    • Develop RCx plan
    • Identify potential operation improvement
    • Identify potential energy savings measures
    • Develop implementation costs and energy savings projections
  • Implementation
    • Work with team to implement recommendations
    • Finalize detailed site assessment
    • Develop targeted FPT procedures
    • Collect and analyze trend data
  • Verification
    • Verify installation and proper operation of retro-commissioning measures
    • Update energy savings based on measured data
    • Prepare final report