Do You Need a HERS Rater for an HVAC Replacement?
Do You Need a HERS Rater for an HVAC Replacement?
In most cases, yes. California's Title 24 energy code requires HERS verification for HVAC system replacements in existing homes. When you replace a furnace, air conditioner, or heat pump, a certified HERS or ECC rater must verify that the new system is installed correctly and meets energy code requirements.
What Does the HERS Rater Check?
For a typical HVAC replacement, the HERS rater will verify refrigerant charge to ensure the system has the correct amount of refrigerant for optimal efficiency, airflow across the indoor coil to confirm it meets manufacturer specifications, duct leakage to make sure the duct system is adequately sealed, and that the equipment matches what was specified on the compliance documents.
When Is HERS Verification Required?
HERS verification is required for most HVAC change-outs that require a building permit. This includes replacing a furnace, air conditioner, heat pump, or package unit. Some exceptions exist for like-for-like replacements in certain situations, but the trend under California's updated energy codes is toward more verification, not less.
How to Prepare for the Inspection
Make sure your HVAC contractor pulls the proper permits and files the CF1R before starting work. The contractor should complete and sign the CF2R installer certificate after installation. Then schedule the HERS rater to perform the CF3R verification. Having all paperwork in order before the rater arrives will help the inspection go smoothly and avoid delays in closing out the permit.