The Houston duct cleaning market includes operators ranging from NADCA-certified professionals with decades of experience to budget operations that deliver little more than a quick vacuum around visible vent openings. Understanding how to evaluate providers before you hire them protects your investment.
Verify NADCA Certification
The National Air Duct Cleaners Association sets industry standards for cleaning methods, technician training, and equipment specs. A NADCA-certified company has demonstrated documented training and verified field experience. If a company cannot provide NADCA certification, that is a significant red flag.
Three Questions Every Homeowner Should Ask
**What exactly does your service include?** Every professional cleaning should address all 8 HVAC components: return ducts, evaporator coils, blower fan, heating chamber, plenum box, supply ducts, register boxes, and grills. Companies that cannot clearly identify each component are likely not treating your entire system.
**Do you provide a free pre-service inspection?** A reputable company inspects your system before recommending treatment and shows you what they find. Companies quoting over the phone without assessing your system or recommending services before inspecting should be avoided.
**How long does a typical service take?** Comprehensive cleaning takes approximately 7 hours for a standard home. Quotes for significantly shorter timeframes indicate incomplete treatment.
The Low-Price Trap
Companies offering duct cleaning at prices well below market average typically deliver cosmetic service that does not meet industry standards. This involves vacuuming visible areas around vent openings while leaving the majority of accumulated debris inside ductwork, evaporator coils, and the plenum box untreated.
[Book a Free Inspection](https://crm.ahchooindoorair.com/book)
AH-CHOO! Indoor Air Quality serves Houston, Austin, San Antonio, and South Louisiana. NADCA certified. Average job time: 7 hours. 8 components cleaned every service. 38 years of experience.