McKinney The Texas Rule, in Plain English
Homeowners sometimes ask why a duct cleaning company doesn't carry the same state contractor license a plumber or electrician does. The answer is in the Texas rule, 16 TAC 75.100. As published on Cornell LII, section (c)(1) says duct cleaning can be performed without a Chapter 1302 contractor license as long as the work is limited to the air distribution system itself, no cuts are made to the ducts or plenums, no electrical connections are altered, and the only disassembly involved is opening or removing grilles and removable registers. That is a narrow, specific carve-out. It covers the brushing, agitation, and vacuum extraction that make up a standard cleaning, not structural or electrical work.
The same rule draws a clear line elsewhere. Section (c)(3) states that biomedical remediation requires a licensed contractor. If a technician tells you they found something in the ductwork that needs biological remediation rather than a standard cleaning, that is a different scope of work, and a different set of credentials should be involved.
What This Means When You're Vetting a Contractor
In practice, most residential duct cleaning jobs in McKinney fall squarely inside the (c)(1) exemption. Nobody should need to cut into your plenum or rewire anything to clean supply and return runs. If a quote includes cutting ducts, moving equipment, or electrical modifications, that's worth asking about directly. Here is a short sequence for sorting out who you're hiring:
- Ask what the job involves. If it's grilles, registers, and the accessible duct interior, that fits the licensed-exempt scope under the Texas rule.
- Ask whether any part of the job requires cutting ducts, modifying plenums, or touching electrical connections. If yes, confirm the company or its partner holds the appropriate Chapter 1302 license.
- If visible mold, vermin, or heavy debris is found, ask how it will be handled and whether that crosses into remediation work covered by (c)(3).
- Get the scope in writing before work starts, not after.
For a sense of what a standard cleaning actually includes, our air duct cleaning page walks through the typical process room by room.
Why the EPA Says 'As Needed,' Not On a Schedule
There's no required interval for duct cleaning in Texas or anywhere else. The EPA is explicit that it does not recommend routine cleaning, only cleaning as needed, and lists three triggers: substantial visible mold growth inside hard-surface ducts or on components, ducts infested with vermin, or ducts so clogged with dust and debris that particles are visibly released from the supply registers. The EPA also states plainly that "duct cleaning has never been shown to actually prevent health problems" — that's their language, not a claim we're making. If none of those three conditions apply, there's no rule, state or federal, pushing you toward a cleaning.
Where This Plays Out Differently Around McKinney
McKinney's housing stock skews newer — the median build year is around 2007, and roughly three-quarters of homes were built in 2000 or later. In newer construction, homeowners sometimes assume a cleaning is part of routine upkeep. It usually isn't yet. If you're in a newer subdivision and curious whether it's worth it this early, our Tucker Hill page walks through why most owners of newer houses probably shouldn't buy a cleaning yet — the same EPA triggers above are the better guide than the age of the house. One exception: if the builder left visible debris sitting at the registers, it's reasonable to ask the contractor to show you what they're finding before you agree to anything.
Attic air handlers and flex duct runs are usually part of the picture in McKinney, particularly in homes built between 1970 and 2000 on slab foundations, a setup one Dallas-area HVAC reference calls the local default for that era. Since there's no basement here, everything mechanical tends to end up in the attic instead, where summer temperatures can climb past 120°F and even standard R-8 duct insulation has to work hard. If your home has flex duct in a hot attic, see our page on flex duct cleaning or replacement for what's involved in that specific setup.
Homes inside McKinney's Historic Overlay District, between US 75 and SH 5, go through a Certificate of Appropriateness process for new construction, redevelopment, or alterations visible from the public right of way, reviewed by the Historic Preservation Advisory Board. That process is about exterior changes, not interior duct cleaning, but if your project touches a dryer vent hood or outdoor HVAC equipment in that district, ask the city before assuming it's outside the process.
Don't Forget the Dryer Vent
Duct cleaning rules get the attention, but dryer vents carry their own real risk. A USFA Topical Fire Report from August 2012, using 2008–2010 data, found an estimated 2,900 residential clothes dryer fires a year nationally, with failure to clean listed as the leading factor at 34 percent. That's a straightforward maintenance item, not a regulatory one, and it's worth checking on its own schedule.
The bottom line: the Texas rule gives duct cleaners room to do standard cleaning work without a contractor license, but the moment a job involves cutting ducts, rewiring, or biomedical remediation, a licensed contractor needs to be part of it.