Home Energy Rating System (HERS) testing is a set of verifications that are used to evaluate the energy efficiency of a home according to California’s Energy Code.
Taking part in HERS testing for any building allows the technician to determine where deficiencies can be improved. Studies have shown that the average home may lose up to 30% of its conditioned air due to poorly installed Heating, Ventilation, and Cooling (HVAC) equipment.
HERS testing is typically required by the California Energy Commission (CEC) to verify the project is meeting its Energy Standards. This requirement is triggered by installing new equipment and applying for a permit at your local Enforcement Agency. HERS testing must be completed before the permit can be closed. Also, these tests can be used as a preliminary tool a building owner can utilize to see how their building is performing. This option may be more in-depth because it does not mandate HERS testing, and typically would be done before, during, and after a building renovation. Applying HERS testing during this process allows the general contractor to work with the technician performing the tests. It ensures that the necessary steps are being taken to increase building comfort, energy savings, and decrease air loss to unconditioned space.
California code may require HERS testing if there is a mechanical change-out during this process. Most commonly, HERS testing is needed on a project having HVAC equipment replaced. However, you can expect to see testing done on additions and newly constructed buildings that include commercial, multifamily, and single-family homes.
Understanding building classification is essential regarding how HERS testing is applied. For example, residential buildings that are between one and three stories classify as low rise buildings, whereas, residential buildings with three or more stories have the same classification as commercial. This classification does apply to both newly constructed or altered buildings. Moreover, building classification, rather it be new construction or alteration will be a factor in how hers testing is applied. For further explanation please the HERS verification section.
HERS Raters
A HERS Rater is a special inspector who is certified by the California Energy Commission (CEC).
They must go through an education process where they are trained, tested, and verified by an approved HERS provider. The HERS rater must pass both a written and field exam before they can receive their certifying license. Currently, Calcerts and Cheers are the only two HERS providers approved by the CEC.
Scheduled for a project must be an independent third party. They cannot be employed by the Builder or installing contractors. The HERS rater must also be certified in the scope of work they are being hired for. The HERS rater is the only person who can provide you with a signed HERS verification
HERS Verification
Is a variety of different tests that can be expected during this process. Duct testing is most common because it’s almost always required. However, there may be refrigerant charge verification, airflow verification, fan watt draw verification, and blower door verification. The required HERS verification will be determined by installation, climate zone, and/or a Title 24 report.
Duct Testing
Is a HERS test that is performed to ensure the HVAC duct system is meeting the minimum energy efficiency standards. Duct Testing also known as Duct Leakage Testing is used to measure the air tightness of your duct system. The technician performing the duct leakage testing will determine if additional duct sealing is needed to bring the system up to code.
HERS Testing in San Diego County
San Diego, Santee, Coronado, La Jolla, Chula Vista, El Cajon, Poway, Carlsbad, La Mesa, National City, Chula Vista.
