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Energy Audits

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Energy Audits


An energy audit is an inspection and analysis of energy usage in a facility. Energy audits identify energy conservation measures to reduce the amount of energy input into a building system without negatively affecting the output.

Levels of Energy Audits

Energy Audit Options

Utility Partnerships


ASHRAE Level 1
Walkthrough Analysis

-A walkthrough audit to obtain an overview of building function and performance
-Identify high-level energy waste analysis
-Involves minimal interviews with site operating personnel
-Review facility utility bills and other operating data
-Generate a report that identifies:

  • Baseline for measuring improvements
  • Low-cost/no-cost energy corrective measures (ECM), briefly described
  • Potential capital improvements for further study
  • Quick estimates of costs, savings and simple paybacks

-Provide information that will assist in prioritizing projects

ASHRAE Level 2
Energy Survey and Analysis

-Provide the preliminary ASHRAE Level 1 analysis
-Give detailed evaluation of building energy systems
-Includes detailed discussions with building owners, managers and occupants
-Provide detailed energy calculations
-Give Life Cycle Cost Analysis providing facility owner with comprehensive understanding of the financial benefits of implementing ECMs
-Auditor to evaluate utility bills of facility including energy demand and rate structure
-Perform financial analysis for each ECM based on implementation cost estimates, site-specific operating cost savings, and the customer’s investment criteria

ASHRAE Level 3
Detailed Analysis of Capital-Intensive Modifications

This level of engineering analysis focuses on the potential capital-intensive projects identified in the Level 2 analysis and involves more detailed field data gathering as well as a more rigorous engineering analysis.
-Provide detailed project cost and savings calculations for major capital investment decisions
-Expands on the Level 2 audit by providing a dynamic model of energy use characteristics of both the existing facility and all ECMs identified
-The building model is calibrated using actual utility data
-Provide load profile variations on both an annual and a daily basis
-May provide sub-metering of major energy consuming systems and monitoring of system operating characteristics.


State agencies may use professional services contractors for state owned or managed facilities by requesting authorized agency staff to perform energy audits by creating a Miscellaneous Operating Project (MOP) or Work Order (WO) and submitting it to State Facilities Administration, Design and Construction Division. DCD will work with the agency to select the appropriate pre-qualified professional services contractor.

Energy Performance Contract Process

Contact Information: 

Chris Parsons, Project Director Manager


RETAP professionals may be able to provide free, confidential, and non-regulatory energy assessments without obligation. RETAP resources are minimal currently.  EGLE –Energy Services is developing an RFP to have the resources available to provide ongoing, wide-range, assessment services to the State of Michigan.

This service is available to state government, and to other public entities as capacity allows.

RETAP Assessment Request
RETAP Website

Contact Information:

David Herb, EGLE, Energy Services


Consumers Energy Retro-Commissioning Program
The Retro-Commissioning analysis program utilizes a Trades Ally to conduct a Facility IQ Test, which analyzes the building efficiency and provides an Energy Star Portfolio Manager benchmark score.  This analysis identifies no or low-cost improvements and recommends extensive measures for deeper savings.  Rebates are listed if applicable.


  • Electric/natural gas service is purchased from Consumers Energy
  • At least 150,000 square feet of conditioned area
  • A majority of the facility is controlled by a building automation system (BAS) with direct digital control (DDC)
  • Facility is free of major maintenance issues
  • Facility is intended to be operational for the next five years without major upgrades
  • Are you willing to commit resources to conduct, study, and implement findings? 

Consumers Energy Website
Retro-Commissioning Program Application

Contact information:

DTE Energy Retro-Commissioning Program
Qualified service provider identifies, reports, and recommends operational and maintenance improvements to building systems and equipment to ensure continued performance over time. Selected initiatives can result in lower operating costs, reduced maintenance spending, and improved occupant comfort/productivity. The study is funded fully by DTE Energy although the implementation costs of the energy-saving measures will be paid by the customer. Typical payback is 18 months or less.


  • The facility is a DTE electric customer with a peak demand of 300 kW or greater
  • The facility has an annual electric energy consumption of 5,000,000 kWh or greater
  • The facility has a functioning Energy Management System (EMS) with trending capabilities
  • Minimum commitment of $10,000 to implement the energy efficiency improvements identified in the study with a combined estimated simple payback of 18 months or less.

DTE - Retro-Commissioning Program
DTE - Standard Track - Retro-Commissioning Program

Contact information:

DTE - Contact Us - Retro-Commissioning Program

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