What are the Updated Nadca Duct Cleaning Standards for 2026?

Jun 24, 2026

The updated 2026 NADCA ACR standard serves as the primary industry benchmark for assessment, cleaning, and restoration in residential ductwork. These standards focus on ensuring air quality through rigorous, verified procedures rather than simple surface dusting.

According to the 2026 standards, professional duct cleaning is defined by the HVAC source removal process, which consists of three essential steps:

  1. Mechanical Agitation: Using specialized tools like rotary brushes or air whips to physically dislodge stubborn dirt and biological films from interior duct surfaces.
  2. Negative Pressure Collection: Utilizing powerful, high-powered vacuum equipment (often truck-mounted) to create a vacuum zone that draws loosened contaminants directly out of the home.
  3. HEPA Filtration: Ensuring all exhausted air passes through high-efficiency particulate air filters to trap 99.97% of particles, preventing them from re-entering the living space.

Furthermore, the 2026 standards emphasize post-cleaning verification. Professionals must provide documented proof of cleanliness, which typically includes camera inspections to view hard-to-reach areas, airflow and static pressure measurements to ensure optimal system performance, and a thorough filter condition assessment.


Related FAQs

chat-icon

Offer Title

Text here...

Request more info

Complete the form below and our team will contact you as soon as possible. If you want to talk to us now, call 719-505-2027

Offer Disclosure