Yes, under the updated residential duct cleaning standards 2026 and the NADCA ACR standard, post-cleaning verification is a mandatory requirement. This process has shifted from an optional practice to a scientifically verified procedure to ensure the system is truly clean.
The verification process includes the following components:
- Post-Cleaning Visual Inspection: A mandatory check, often utilizing remote video technology, to ensure no hidden contamination remains in the ductwork.
- ACR Surface Test: This objective test scientifically measures surface cleanliness. According to the standard, verification is successful when less than 5% of the surface area remains visibly contaminated, indicating a removal rate of over 90%.
- Mandatory Documentation: Homeowners must receive a cleaning log that includes photos and the verified results of the ACR test.
These protocols provide measurable proof that the HVAC source removal process was successful, removing the guesswork associated with older, visual-only inspection methods.
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