How is Retro-Commissioning Different From an Energy Audit?

Building retro-commissioning and facility energy audits are both tools for improving the energy efficiency of buildings, but they differ in their focus and methodology.

Facility energy audits typically involve a comprehensive review of a building's energy usage and systems, with the goal of identifying ways to reduce energy waste. This review includes an examination of the building envelope, HVAC systems, lighting and other energy-using equipment. What you'll get is a detailed report that outlines energy-efficiency measures, such as equipment upgrades or operational changes.

Retro-commissioning, by contrast, is the first stage in a systematic process of evaluating and optimizing the performance of a building's existing systems in buildings that have not previously been commissioned. Retro-commissioning focuses on identifying and correcting issues with the building's mechanical and electrical systems that may be causing inefficiencies, occupant discomfort or maintenance problems. The goal is to ensure that building systems operate as intended and meet the needs of the occupants while also minimizing energy consumption.

Basically, facility energy audits are used to identify opportunities to save energy, while retro-commissioning focuses on optimizing existing systems to achieve those savings. Both tools effectively improve building energy efficiency and can be used together as part of a comprehensive energy management program.