Raleigh-Durham Air Duct Cleaning: 18 Verified Companies with Pricing & Credentials

• NADCA Certified
  The National Air Duct Cleaners Association is the only trade body specific to this industry. NADCA membership requires at least one ASCS (Air Systems Cleaning Specialist) certified technician on staff and adherence to the ACR standard for assessment, cleaning, and restoration. Eight Triangle-area companies currently hold this certification — verified directly through NADCA's public directory, not through company self-reporting.
• NC Heating Contractor License
  If a company performs any HVAC repair work (ductwork replacement, equipment modifications, system connections), NC law requires an H-class license from the NC Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors. Duct cleaning alone may not require licensure under a §87-21 exemption, but any repair work does. Verify licenses at nclicensing.org. Enviro Air (NC License #29532) is the only non-NADCA company in this research with a confirmed state license number.
• Local Area Code
  The Research Triangle's legitimate local area codes are 919 and 984. A phone number from outside these codes — especially a toll-free 800/888/855 number or an out-of-state area code — is a meaningful red flag for a company claiming to be a local Triangle provider. We note non-local numbers explicitly in each listing.
• Crawlspace HVAC Competency
  The Triangle's widespread crawlspace HVAC installations create a compounding problem where duct contamination intersects with moisture intrusion. A company that can address both — duct cleaning plus crawlspace encapsulation, moisture barriers, and mold remediation — provides substantially more value than one that only cleans supply vents. We flag companies with demonstrated crawlspace competency throughout this directory.
• Before & After Documentation
  Legitimate duct cleaning companies photograph or video the interior of ducts before and after cleaning to demonstrate the work performed. In the Triangle's market — where bait-and-switch operators frequently claim to discover mold, collapsed flex duct, or debris justifying additional charges — before-and-after documentation is especially important. Companies that provide photo evidence proactively earn additional trust.

This directory is built from independent verification, not advertising revenue or business submissions. We do not accept payment from listed companies and do not rank companies based on sponsorship.

Data sources:

• NADCA Find a Professional directory
• NC Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors (nclicensing.org)
• NC Secretary of State business registration
• Google Business Profiles
• Yelp
• Angi / HomeAdvisor
• BBB
• Nextdoor
• Trustindex
• HomeYou (586 Raleigh projects)
• AAFA Allergy Capitals 2025–2026
• ABC11 / WTVD (2014 Triangle duct cleaning investigation)

Exclusion criteria: A business is excluded from this directory if it uses a virtual office, PO Box, or auto-generated web presence with no verifiable operational base; shows patterns consistent with lead-generation fronts (generic city-keyword domains, template websites, no owner identification); falsely claims NADCA certification not found in the NADCA directory; or advertises pricing below $199 for whole-house cleaning, which we consider a definitive bait-and-switch indicator in this market.

NC-specific verification note: NC General Statutes §87-21 creates a licensing gray area for standalone duct cleaning — we do not penalize companies for lacking an H-class license when they perform cleaning-only work. However, any company performing ductwork repair, modification, or replacement should hold the appropriate H-class license, verifiable at nclicensing.org. NC also has no state mold remediation license requirement. For mold-related claims, we look for voluntary IICRC S520 certification and evidence of pollution liability insurance.

Update frequency: This directory is reviewed quarterly. NADCA membership status is re-verified at each review through the primary NADCA directory. The most recent verification was completed in March 2026.

Report an error or suggest a business: If you believe a listing contains incorrect information, or if you know of a legitimate air duct cleaning company in Raleigh-Durham that should be considered for inclusion, please contact us. We will verify the submission against our standard criteria before adding it.