Duct Cleaning in Lewisville, TX
A duct cleaning is worth paying for when it reaches the whole system and fixes a real problem. In a Lewisville attic system that usually means the return side, the blower and the coil as well as the runs to each room.
What the job involves, start to finish
A proper cleaning follows the method in ACR, the standard published by the National Air Duct Cleaners Association. The principle is source removal: the dirt is physically loosened and carried out of the house, not stirred up and left to settle.
Inspection first
Someone looks before anyone quotes a final number: the attic, the air handler cabinet, the return and a few supply runs, often with a camera. This is when you find out whether the problem is dust, a crushed flex run, a disconnected boot or a dirty coil, and those have very different fixes.
Negative pressure
A large vacuum, usually truck-mounted or a portable negative-air machine with filtration, is connected to the trunk near the air handler. Every register is covered. The point is that the whole section being cleaned pulls air inward, so anything knocked loose travels to the collector instead of into the bedrooms.
Agitation, run by run
With the vacuum running, each supply and return run is worked from the register end with rotary brushes, air whips or skipper balls sized to the duct. Flex duct needs a gentler tool than sheet metal, and fibreglass duct board gentler still. The registers and grilles come off and get washed.
The equipment end
The supply and return plenums, the blower wheel, the evaporator coil and the drain pan. The EPA's checklist names all of them, and its reasoning is simple: clean the ducts and leave a dirty blower or coil, and the system re-contaminates itself.
Why ducts in Lewisville get dirty
North Texas houses are built on slabs, so the air handler sits in the attic or a hall closet and the ductwork runs through the attic above the ceiling. Through a cooling season that starts in May and runs into October, that attic gets far hotter than the rooms below it. Tape on flex duct joints dries out, collars loosen, and boots pull away from the ceiling drywall. Every leak on the supply side wastes cooled air. Every leak on the return side does something worse for cleanliness: it pulls attic air, insulation fibre and construction dust into the system, upstream of nothing but the filter. That is why a Lewisville house can have dusty ducts five years after a cleaning, and why a cleaning that does not include finding and sealing the return leak is mostly cosmetic. In the 1970s and 1980s houses between I-35E and Valley Parkway, the return duct is often older than the air handler it feeds. In Castle Hills and the bigger two-story houses, there are usually two systems, one in the attic serving upstairs and one serving the ground floor, and each needs its own cleaning.
When it is worth doing, and when it is not
The EPA's position is blunt. It does not recommend cleaning ducts routinely, only as needed, and it notes that duct cleaning has never been shown to prevent health problems. It names the cases where cleaning makes sense:
- Substantial visible mold growth inside hard-surface ducts or on other parts of the system
- Rodents or insects living in the ductwork
- Ducts clogged with excessive dust and debris, or debris actually blowing out of the supply registers
Add the local ones: a remodel that put drywall dust through a running system, a new house that ran its air conditioning during construction, or a home you just bought where nobody knows what the previous owner kept.
What is not a reason: a grey fringe on the hall return grille, which is normal and comes off with a vacuum; a mailer that says ducts should be cleaned every year; or a phone salesman offering a whole house for $99.
Flex, metal and duct board are cleaned differently
Most Lewisville attics carry round flex duct to the rooms off a sheet-metal or duct-board trunk. Sheet metal takes a stiff rotary brush. Flex duct has a thin inner liner over a wire coil, and an aggressive brush can tear it, so the usual tool is an air whip or a soft brush. Fibreglass duct board and lined duct need the most care of all, because scrubbing breaks the surface fibres loose. The EPA adds two points that matter on these materials. No biocide is registered for use on fibreglass duct board or fibreglass-lined duct. And insulation that is wet or moldy cannot be cleaned effectively: it gets replaced. If someone offers to clean and spray a run of soaked, mildewed flex, the honest version of that quote is a replacement.
Sprays, fogging and sealants
Many companies offer to spray a sanitiser or biocide after the cleaning, or to fog the ducts with something that smells clean. The EPA's guidance is that research has not shown these products work in ducts or established their health effects, that a biocide should only be considered where there is visible microbial growth, and that you should see the product label and understand it before agreeing. Sealants painted inside ducts are not a routine recommendation either. A company that leads with the spray rather than the cleaning is selling the spray.
The Texas licensing line
Under 16 TAC 75.100(c), Texas allows duct cleaning without a state contractor licence only on the air distribution system, from the supply plenum to the supply grilles and from the return grille to the air handler intake. No cuts to ducts or plenums, no changes to electrical connections, and no disassembly beyond grilles and registers that come off on their own. Cleaning the blower and coil means opening the air handler, and cutting a service port into a trunk means cutting a duct. Both fall outside that exemption and belong to a contractor licensed by TDLR for air conditioning and refrigeration. Plenty of local duct companies hold that licence or work with someone who does. Ask which applies to the company quoting you.
How to check the work afterwards
The EPA lists what a finished job should look like, and most of it you can check yourself with a flashlight:
- Ask to see inside a supply run and the plenum. They should be visibly clean, with no debris you can see
- Shine a light into the cooling coil. Light should pass through, and the fins should be straight and evenly spaced
- The coil drain pan should be clean and draining
- Any access panel cut into a duct should be closed with more than duct tape and should barely leak
- Registers and grilles should be back on firmly, and the system should run in both heating and cooling
- The filter should fit its slot properly and be the rating the equipment calls for
Price and timing
For one system on an ordinary Lewisville house, local companies generally quote a full source-removal cleaning at somewhere around $400 to $900. The number moves with the count of supply and return runs, a second system, access in the attic, and whether the coil and blower are in scope. The cost guide goes through each line. Any month works: the work does not depend on weather, though spring books up first, when pollen season sends everybody to look at their registers at once.
Call for a free quote. A local company will ask about the house first, look before giving a firm price, and tell you if the honest answer is a filter and a sealed return rather than a full cleaning.
| Offer | What usually happens | Typical result |
|---|---|---|
| $99 or $149 "whole house" | A shop vacuum at each register, sometimes a short hose pushed a few feet in. Upsell pitch for sanitising, mold treatment or coil work once inside. | The visible register face is cleaner. The ducts, blower and coil are not. Final bill often far above the advertised price. |
| Ducts only | Negative pressure and agitation through the supply and return runs; registers washed. Air handler not opened. | Clean duct runs. A dirty coil or blower can re-soil them within months. |
| Full system, ACR-style | Inspection, negative pressure, agitation of every run, plenums, blower, coil and drain pan cleaned; return leaks found and noted or sealed. | The job the EPA describes. Takes hours, not minutes, and the blower and coil part needs a TDLR-licensed contractor. |
Where we work in Lewisville
- Old TownMain Street and Mill Streetthe original downtown and the oldest houses in the city; many have had their heating and cooling replaced more than once, so the ductwork can be a mix of old metal trunk and newer flex
- Central Lewisvillebetween I-35E and Valley Parkwaymuch of the city's 1970s and 1980s housing, now on a second or third air handler while the attic return duct is often the one that came with the house
- Castle HillsWest Lewisville, along SH 121master-planned from the late 1990s and part of the city only since November 2021; the larger two-story homes often run two separate systems, which roughly doubles the job
- Vista RidgeSouth Lewisville, SH 121 and I-35Earound the mall, dense with apartments, townhomes and newer builds, where the dryer often vents a long way to a roof or upper-wall cap
- Lake side of I-35EEast Lewisville toward Lewisville Lakea mix of 1980s subdivisions and newer infill, mostly single-story slab homes with the air handler and nearly all of the duct run in the attic
ZIP codes served75057 · 75067 · 75077 · 75056
Common questions
What does duct cleaning cost in Lewisville?
For a full source-removal cleaning of one system, local companies generally quote somewhere around $400 to $900. Two systems, many runs, tight attic access or coil and blower cleaning push it higher. The rates are set by the company that quotes you, not by this site, but a price far outside that range is worth asking about in either direction.
How often should ducts be cleaned?
There is no fixed interval. The EPA recommends cleaning only as needed, not on a schedule. In practice many Lewisville houses go a decade or more without needing it, while a house with a leaky attic return, a recent remodel or pets shedding into the return may need it sooner.
Will it help my allergies?
Maybe, and nobody can promise it. The EPA says duct cleaning has never been shown to prevent health problems, and much of the dust in ducts sticks to the duct walls rather than blowing into rooms. A better filter, a sealed return and a clean coil usually do more for a house full of oak pollen than the duct cleaning on its own.
How long does it take?
Plan on three to five hours for one system on a single-story house, and most of a day for two systems. A whole house finished in under an hour was not cleaned by source removal.
Do they need to get into the attic?
Yes, in almost every Lewisville house. The air handler, trunks and most of the runs are up there. Clear a path to the attic access before the appointment and make sure the decking near the unit can be stood on.
Will they cut holes in my ductwork?
Sometimes a service opening is cut into a trunk to reach it with the vacuum hose. Under the Texas rule, cutting into ducts takes the job outside the unlicensed duct-cleaning exemption, so ask who is doing it and how the opening is closed. The EPA expects a proper panel, not a square of duct tape.
Should I let them spray a sanitiser?
Only if there is visible microbial growth, you have seen the product label, and you understand what it is. The EPA notes that no biocide is registered for fibreglass duct board or lined duct, and that the benefits of these sprays in ducts have not been shown.
Is it worth doing before I move into a house?
Often, yes. You do not know how the previous owners lived, whether pets or smokers used the house, or whether a remodel ran dust through the system. It is also the easiest time to do it, with the rooms empty.
Can I do it myself?
You can vacuum registers and the first foot of each run, and change the filter. A household vacuum cannot hold the system under negative pressure, so it will loosen more dust than it removes from deeper in. The useful DIY job is in the attic: look for disconnected or crushed flex and gaps around the return.
Is the work guaranteed?
That is between you and the company that does it, and terms vary. Ask what the guarantee covers in writing before booking. This site does not perform the work and cannot warrant it.
Also in Lewisville
- Dryer Vent Cleaning in Lewisville
- HVAC Duct and Air Handler Cleaning
- Mold in Air Ducts: Lewisville Homes
- Duct Cleaning After a Remodel or New Build
Also serving
Duct Cleaning is available beyond Lewisville, across Frisco , Denton , Carrollton , Flower Mound and The Colony .
Get a quote for duct cleaning
Tell us about the house and a local duct cleaning company will get back to you, usually within a day or two. Answered Mon–Sat, 8am–6pm · after hours we call back the same day Or call (945) 313-5984 — most people get an answer faster that way.