Duct Cleaning in San Antonio, TX

Get the Attic Out of Your Air

Air duct cleaning, inspection and sealing for homes across San Antonio, Helotes, Schertz and New Braunfels. We look inside the ducts first and tell you whether cleaning will actually help.

San Antonio Duct Cleaning

What Ends Up Inside a San Antonio Duct System

Almost every duct system in this city runs through the attic, and a San Antonio attic is a dusty, 120-degree place for most of the year. Flex duct from the 1990s and 2000s subdivisions of Stone Oak, Alamo Ranch and the northeast side sags, kinks and separates at the joints over time, and every gap pulls in attic air along with insulation fibers and dust. On top of that comes what blows in from outside: live oak pollen every spring, mountain cedar every winter, and the Saharan dust that hazes the sky most summers. With a system that runs seven months straight, all of it gets drawn through the ducts and, eventually, back into the rooms.

Older homes have their own version. The metal ducts in 1950s and 60s houses in Alamo Heights, Terrell Hills and the near north side have decades of accumulation and often a few rusted or disconnected sections. Newer builds in Cibolo and the far west side can have drywall dust and sawdust from construction sitting in the runs from day one. And in the humidity here, a duct that has been pulling in moist attic air can develop the musty smell homeowners notice most.

Our duct cleaning page explains the equipment and the process in detail. Here is how we approach a San Antonio house.

  • Camera inspection first We look inside before we quote. If the ducts are clean and the problem is elsewhere, we say so.
  • Leaks found while we are there Cleaning a leaky duct fills it back up. We flag disconnected and torn runs and price the sealing separately.
  • Whole-house approach Ducts, returns, plenum, filter and, if you want it, the coil. Dust in the ducts usually means dust on the coil too.
Radiant technician arriving at a San Antonio home for a duct inspection

Do You Need It?

When Duct Cleaning Is Worth It in San Antonio

Duct cleaning is oversold in this business. These are the situations where it genuinely helps.

  • You just bought an older home

    You do not know what the last owners did, whether they had pets, or when the ducts were last touched. A look inside settles it.

  • A remodel or new construction

    Drywall sanding and sawdust get into open registers and stay there. Common in new Alamo Ranch and Cibolo builds.

  • Dust reappears days after you clean

    A thin film on every surface that comes back fast points to ducts that are either loaded or leaking attic air.

  • A musty smell when the air kicks on

    Moisture in the ductwork or on the coil. In San Antonio humidity, this deserves a look at the coil and drain as well as the ducts.

  • Rodents or insects in the attic

    Nesting material and droppings in ducts are a health issue, not a dust issue. The entry points need sealing too.

  • Weak airflow at some registers

    Sometimes a blockage, more often a crushed or disconnected flex duct in the attic. Cleaning alone will not fix the second one.

The Job

How Duct Cleaning Works at Your House

A few hours for a typical single-system home. Longer for two systems or a lot of runs.

  1. Inspect and show you

    Camera into the ducts, a look at the attic connections and the coil. You see what we see before anything is priced.

  2. Written recommendation

    Cleaning, sealing, repair, or none of the above. Priced in writing and honored for 72 hours, no hidden fees.

  3. Clean under negative pressure

    The system is put under vacuum and each run is agitated toward the collector. Registers come off, get cleaned and go back.

  4. Seal, reassemble, verify

    Any leaks you approved are sealed, a fresh filter goes in, and we run the system to confirm airflow at every register.

Wondering What Is in Your Ducts?

Start with an inspection. If cleaning will not help, we will tell you.

What Our Customers Say

Don't just take our word for it — hear from our satisfied customers

C Claudia H.
Claudia H. 3 years ago
★★★★★
Our 18 year old HVAC system finally gave out this past week, so we reached out to Radiant to see what could be done. They sent a tech out named Bryan the same day, and he did a great job looking over the entire HVAC system. He was friendly and helpful in explaining everything that he saw, and our options moving forward. We decided to replace the entire system, so we met with Jacob (same day thankfully) to find the best HVAC system for our needs. Jacob was friendly, professional, and did a great job explaining the different options on offer. Radiant was able to set-up next day install, which was much appreciated, because the temps were still going to be cold in the coming days.

The install team consisted of Carlos and Pablo, who were very courteous and professional, and were kind enough to answer any questions I had regarding the install. They did a great job installing our new HVAC system, and were tidy which is always appreciated! Before they left, they explained everything that had been done, and showed me photos of the work.

Our entire experience from start to finish was great. I appreciate that they send photos of who is coming to your home too. Friendly, kind, professional team members, and good work all the way around. Thanks Radiant!
R Renee Mayer
Renee Mayer 3 years ago
★★★★★
This is the first time I’ve used radiant my neighbor recommended them…. I called them today and they set me up an appointment on the same day. I was totally shocked at that and the service call was only $39!!…. Highly recommend them Danielle showed up and he was a great guy and he put up with all my wishy-washiness and I had to hurry him because I was heading to church and he got caught in a lot of traffic getting here he even would’ve installed the part that broke but I Didn’t have the time tonight….. He was patient with me and just told me to call the office first thing in the morning and get a service call set up…. Thank you so much Radiant!!….
With another cold front coming in tomorrow now I just hope they can get me scheduled for a separate call tomorrow but I have a feeling they will. They are such a great company!!😊😊
A Art
Art 5 years ago
★★★★★
Alex performed the winter service on my unit. This business along with Alex, are very professional and upfront about everything. To be transparent, this is the maintenance included with the purchase of a unit from them. I was informed about everything to include pictures as proof. I was told that my unit is 100% and very clean and again pictures to prove it. I was reccomended this business by a friend and glad he did. The initial purchase experience was also amazing. I had contacted 5 other businesses to get quotes about a new unit as my upstairs unit failed. 2 were outrageous quotes and I am technically still waiting on the other 3. On every instance of getting a quote, I waited about 1 week. Luckily my house has two units but still, un acceptable especially during the summer. I guess they all had so much business they did not care for mine. When I called this business not only did they come out the same day, I had the new unit installed with in 48 hrs. Oh and let's not forget the quote they gave me was the lowest of all. I can say enough good things about this business. Keep up the great work.

Maintenance Membership

Join the Care Club

Home maintenance for $9.99 a month.

Care Club members get two HVAC tune-ups and a plumbing safety inspection every year, priority scheduling, no dispatch fees — ever — and 5% off every repair.

  • Priority scheduling
  • Seasonal HVAC tune-ups
  • Annual safety inspection
  • Exclusive member discounts
  • Free dispatch on repairs
  • No long-term contracts

San Antonio Duct Cleaning Questions

How often should ducts be cleaned in a San Antonio home?

There is no fixed schedule, and anyone who quotes you one every year is selling. Ducts need cleaning when they are dirty, and the honest way to know is to look. In San Antonio the things that load ducts faster than average are a leaky attic duct system pulling in dust and insulation, pets, a remodel, heavy oak or cedar pollen seasons with a weak filter, and a rodent problem in the attic. For a well-sealed system with a decent filter changed on time, many years can pass without a need. Our approach is a camera inspection first, and a cleaning quote only if the inspection justifies one.

Will duct cleaning help with my cedar fever?

Only a little on its own. Mountain cedar pollen is fine enough to pass through a basic filter, and the pollen that is in your ducts is far less than what comes in through doors, windows and on clothes every day from December through February. Cleaning removes what has accumulated, which helps if the ducts are heavily loaded, but the bigger wins are a higher-efficiency filter or whole-house filtration, sealing the ducts so they stop pulling in attic air, and running the system fan to keep air moving through that filter. We often pair a duct cleaning with a filtration upgrade for exactly this reason. The options are on our San Antonio indoor air quality page.

Why do you keep mentioning duct sealing when I asked about cleaning?

Because in this city they are hard to separate. A large share of the San Antonio duct systems we inspect have leaks at the joints, crushed sections behind attic storage, or a run that has pulled off its boot entirely. A leaky duct pulls hot, dusty attic air into the system every time the blower runs, which is how the ducts got dirty in the first place. Cleaning them without sealing them means the dust is back in a couple of seasons, and you are still paying to cool the attic. Sealing also has a comfort payoff: the rooms at the end of the longest runs finally get the air they were supposed to. Details are on our duct sealing page.

Does duct cleaning make a mess in the house?

Not when it is done under negative pressure, which is the only way we do it. A large vacuum is connected to the duct system so that everything loosened inside the ducts travels toward the collector rather than out of the registers. Technicians cover floors along their path, remove and clean the register covers, and put them back. You will want to move furniture away from registers and returns before we arrive and keep pets in another room. When we leave, the system is reassembled, a new filter is in place, and the only visible change should be that the registers are cleaner than they have been in years.

*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
(210) 294-6703 Book Now
×