A Multifamily Energy Auditor is a building science and energy efficiency specialist who assesses the energy efficiency of multifamily building systems. They provide building owners with specific and actionable recommendations to improve the building's level of energy efficiency, increase occupant comfort, support health and safety, and reduce operation and maintenance costs.

Multifamily Energy Auditors begin by meeting with building owners and occupants and conducting a visual inspection of the building. Energy Auditors talk with building owners and discuss operation and maintenance costs including utility bills for the building. They also talk with occupants to assess their comfort level in the residential spaces. Multifamily Energy Auditors perform diagnostic tests to locate air leaks and determine how much energy the building might be losing through the building envelope. Energy Auditors use digital thermometers, air velocity monitors, light meters, and other tools to help them analyze energy use in the building as well as assess the condition of heating and cooling systems, air quality and ventilation, and lighting. After the visual inspection and onsite tests are complete, Multifamily Energy Auditors prepare a report that includes the inspection and test results as well as recommended energy efficiency upgrades and improvements and possible financial incentives. The audit report includes potential cost savings calculations for particular upgrades and might compare minor versus major upgrades. Energy Auditors must provide cost-savings to justify the expense of energy efficiency upgrades.

Education is a key component of a Multifamily Energy Auditor's job as a building owner's level of awareness varies when it comes to the factors that impact building energy use. Energy Auditors have the ability to motivate building owners and occupants to reduce energy usage, increase sustainability, and invest in energy efficiency upgrades.