New Orleans Air Duct Cleaning: 23 Verified Companies with Pricing & Credentials

Louisiana's LSLBC requires a Mechanical Contractor license (HVAC/Duct Work subclassification) for commercial projects exceeding $10,000 in labor and materials. Typical residential duct cleaning ($300–$1,000) falls below this threshold and may not require the mechanical license. However, if mold is discovered and remediation is needed, a separate LSLBC Mold Remediation Contractor license is required for any work valued at $1 or more — one of only seven states with this requirement. This license demands 24 hours of board-approved training, a $25,000 net worth, and carries criminal penalties of up to $500/day and 3 months imprisonment for unlicensed work. Verify any contractor's license at lslbc.louisiana.gov/contractor-search/. Ask specifically for the mold remediation license number before authorizing any mold treatment.

Post-Katrina rebuilds from 2006 to 2011 are now 15 to 20 years old, and their HVAC systems are entering the window where duct cleaning becomes advisable. Even though these homes were built to modern standards, New Orleans' extreme humidity causes condensation inside attic ductwork that accumulates mold, dust, and biological growth over time. NADCA recommends cleaning every 3 to 5 years in high-humidity climates — meaning post-Katrina homes that have never been professionally cleaned since the rebuild are overdue. Red flags include visible mold on vent registers, musty odors when the system runs, unexplained allergy symptoms, and uneven airflow between rooms. Post-Katrina homes typically have standard forced-air systems with attic ductwork that is straightforward for NADCA-certified technicians to clean, generally in the $400–$650 price range.

Visible mold on vent registers in New Orleans is extremely common due to humidity and is a warning sign, but it does not automatically mean your entire duct system is contaminated. Condensation forming on cold metal registers when humid air passes over them creates surface-level mold that may be localized. However, if mold is visible on registers, it likely also exists inside the duct system — particularly where insulated flex duct passes through unconditioned attic space. Do not let a duct cleaner "discover" mold on-site and immediately pressure you into expensive remediation. The proper approach: (1) independent mold testing by a certified indoor environmentalist to determine scope and species, (2) duct cleaning by a NADCA-certified company if contamination is confirmed, and (3) mold remediation only by a contractor holding a Louisiana LSLBC Mold Remediation license. The fake "mold discovery" upsell is the single most common scam in this market.

NADCA's national guideline is cleaning every 3 to 5 years, but New Orleans' extreme humidity pushes most local professionals to recommend the lower end — every 3 years for most homes, or annually for homes with known mold issues, pets, smokers, or occupants with respiratory conditions. In drier climates like Phoenix or Denver, homeowners can often stretch to 5 to 7 years. New Orleans' 76% average humidity, 8 to 9 months of AC operation, and frequent thunderstorms create condensation inside ductwork that accelerates biological growth. The city's lush vegetation also produces heavy pollen loads, and proximity to Lake Pontchartrain, the Mississippi River, and bayous introduces elevated moisture into HVAC intake air. Homes with ductwork in unconditioned attic space — the most common configuration in suburban parishes — should be inspected annually even if full cleaning is done less frequently.

Post-hurricane contractor fraud is endemic in New Orleans — the DOJ prosecuted over 1,300 disaster fraud cases after Katrina alone. To verify legitimacy: (1) Check LSLBC license status at lslbc.louisiana.gov — mold remediation requires a separate license and unlicensed work is a criminal offense. (2) Search the NADCA member directory at nadca.com/find-a-professional. (3) Check BBB accreditation at bbb.org. (4) Verify a physical Louisiana address — not just a P.O. box or service-area listing. (5) Confirm a 504 or 985 area code — toll-free or out-of-state numbers are red flags. (6) Ask for references from New Orleans-area clients. (7) Never pay more than 10% or one-third upfront. (8) Reject door-to-door solicitation from unfamiliar companies after storms. (9) Report suspected fraud to the National Center for Disaster Fraud hotline: 1-866-720-5721.

The North Shore has limited dedicated duct cleaning presence. Only one NADCA-certified company — Ah-Choo! Indoor Air Quality Specialists — is physically based in St. Tammany Parish (Slidell, 1000 Caruso Blvd). Cajun Duct Cleaning maintains a second physical location in Mandeville (211 Devon Dr). Beyond these, North Shore residents are served by SERVPRO franchises in Covington and Slidell, Aire Serv of Covington, and several metro-area companies that travel including IAQ Services (Metairie), Duct Doctor USA (Baton Rouge), and Healthy Air Duct Cleaning (Houma). North Shore pricing runs approximately 5 to 10% below metro New Orleans for locally based companies, though travel fees from metro-based companies may offset this. Be especially cautious of companies advertising North Shore service through city-specific websites with no verifiable physical address — multiple spam sites specifically target Covington, Mandeville, and Slidell searches.

In Louisiana, duct cleaning and mold remediation require different credentials, and relatively few companies hold both. Standard duct cleaning does not require a state license for typical residential projects under $7,500, though NADCA certification is the industry gold standard. Mold remediation, however, requires a separate LSLBC Mold Remediation Contractor license — demanding 24 hours of board-approved training and a $25,000 net worth. Companies in this market confirmed to hold both NADCA certification and a verified mold remediation license include IAQ Services (Metairie, 504-227-0200), Cajun Duct Cleaning (Harvey/Mandeville, license #250472), Healthy Air Duct Cleaning (Houma, license #251151), and DUCTZ of South Louisiana (Lafayette). Using a single company for both services can reduce total cost by 10 to 15% versus hiring separately, but always verify the mold remediation license number independently through the LSLBC database before authorizing mold work.

Legitimate pricing in New Orleans ranges across several tiers: Budget non-NADCA ($275–$350) for basic residential cleaning by non-certified companies — anything advertised under $99 is a scam or bait-and-switch. Mid-tier non-NADCA ($350–$450) for standard service from established local companies including basic supply and return duct cleaning, register removal, and basic sanitizing. NADCA-certified standard ($450–$700) for full source-removal cleaning per NADCA ACR standards including air handler, blower fan, and evaporator coils with before and after documentation. NADCA-certified premium ($700–$1,200+) for larger homes, multi-system residences, or services including mold treatment and full sanitization. Add-on services include dryer vent cleaning ($100–$150), sanitizing ($30–$50), UV light installation ($500–$1,500), camera inspection ($75–$150), and mold remediation for the duct system ($1,500–$5,000+). North Shore pricing runs approximately 5 to 10% below metro New Orleans for locally based companies.