What is a HERS test? When does it happen? Kristine Hanks July 07, 2021 22:48 The HERS test is an energy efficiency test to make sure that our installation meets the state's energy efficiency standards. The HERS test is scheduled after installation is complete. Related articles What can I expect for my HVAC inspection? How long does an HVAC permit take to be approved? What’s Included In The HVAC Tune-Up? Comments 0 comments Please sign in to leave a comment.