What is a HERS Test and Why Every California Home Needs One

A Home Energy Rating System (HERS) test evaluates how energy efficient a home is, with a primary focus on the performance of the heating, ventilation, and air conditioning (HVAC) system.

In California, these tests are required under Title 24 energy regulations for many residential construction and improvement projects.

HERS testing is commonly required for:

• HVAC system replacements or upgrades
  
  

• New home construction or additions
  
  

• Renovations that affect ductwork or insulation
  
  

• Energy efficiency improvements
  
  

Think of it as an energy performance checkup for your home. In California, passing required HERS verification is often necessary before a project can receive final permit approval.