ASRAE Energy Audit Level 3

An energy audit is the key to a systematic approach to decision-making in the area of energy management. The primary function of an energy audit is to identify all of the energy streams in a facility in order to balance total energy input with energy use. The four main objectives of an energy audit are as follows:

To establish an energy consumption baseline

To quantify energy usage according to its discrete functions

To benchmark with similar facilities under similar weather conditions

To identify existing energy cost reduction opportunities

Energy audits vary in depth, depending on the potential at a specific site for energy and cost reductions and the project parameters set by the client. As per ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) standards, there are three types of audits, outlined below.

ASHRAE Level 3 – Detailed Analysis Of Capital Intensive Modifications

Level 3

  • Attention to capital-intensive projects identified during the Level 2 audit
  • More detailed field analysis
  • More rigorous engineering analysis
  • Cost and savings calculations with a high level of accuracy

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. It provides detailed project cost and savings calculations with the high level of confidence required for major capital investment decisions. This audit alternatively is called a comprehensive audit, detailed audit, or technical analysis audit. It expands on the Level 2 audit by providing a dynamic model of energy use characteristics of both the existing facility and all energy conservation measures identified. The building model is calibrated using actual utility data to provide a realistic baseline against which to compute operating savings for proposed measures. Extensive attention is given to understanding not only the operating characteristics of all energy consuming systems, but also the situations that cause load profile variations on both an annual and a daily basis. Existing utility data is supplemented with sub-metering of major energy consuming systems and monitoring of system operating characteristics.

Data Collection

Data collection is completed according to the latest edition of Procedures for Commercial Building Energy Audits published by ASRAE. Forms and reports are generated according to the level of audit and to performance or

  • Project Information (Name, Address, Contact)
  • Space Summary (Building Use, Conditioned vs. Unconditioned area)
  • 36 months of utility bills (electric, water, gas)
  • Energy Consumption Summary (count of all lighting and equipment, wattage, run times)
  • Pictures of each type of equipment:
  • Quantity and manufacturer information of all equipment: lighting, pump, fan, refrigeration, cooking, heat, pumps.
  • Energy cost summary by fuel type.
  • Verde Solutions LLC |
  • 2211 North Elston Ave. Suite 201
  • Chicago illinois 60614
  • Phone:800.541.1137