The Home Energy Auditing Standard defines the requirements for a building-science-based evaluation, or audit, of existing detached single-family dwellings and townhouses that meet specific criteria detailed in the scope of the standard.

The four HEP certifications demonstrate advanced competency through work experience prerequisites, as well as rigorous written and field exams administered by participating BPI test centers. 

A recent letter to the American National Standards Institute (ANSI) is requesting that ANSI withdraw Building Performance Institute Inc.’s (BPI) accreditation as a Standards Development Organization for “repeated violations of BPI’s approved operating procedures and specific requirements of the ANSI essential requirements.”