HERS Verification Title 24, part 6
What is it: HERS stands for Home Energy Rating System. This process is a field verification and diagnostic testing service developed to
show compliance with the “California Building Energy Standards”.
Why it's important: A study conducted by National Comfort Institute shows that the average HVAC system is only performing at 58% efficiency. Don’t get lumped in with the national average. Prove the high quality and performance of your work with diagnostic testing.
Cooling Coil Airflow Testing -
Costa Mesa - Orange County
Title 24 has set a minimum airflow requirement that needs to be HERS Verified. Using the most
sophisticated and accurate equipment we can measure the quantity of air going through your
HVAC system.
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HERS Cooling Coil Airflow Testing
For new HVAC systems the requirements are 350 cubic ft/min per ton of AC:
Example – 350 CFM X 5 (ton AC) = 1750 CFM minimum
Zoned System Airflow - RA3.3.3.4.4
“Zoned air distribution systems shall meet both the airflow (cfm/ton) and fan efficacy (Watt/cfm) criteria in every zonal control mode, except that multi-speed compressor systems or variable speed compressor systems shall only be required to verify air flow (cfm/ton) and fan efficacy (Watt/cfm) for system operation in cooling mode at maximum compressor capacity and maximum system fan speed and with all zones calling for air conditioning.”
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