Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Fast, Reliable Air Duct Cleaning Across Castle Hills
Air duct cleaning in Castle Hills typically runs $450 to $1,200 for a single system, and $900 to $2,800 for a larger home with multiple attic-mounted air handlers. That range reflects something we see constantly in Castle Hills: sprawling single-story ranches from the 1970s and 1980s with two or three separate HVAC systems and duct runs that stretch 100 feet or more through hot attics. Our crews work in Castle Hills multiple days each week, and we know the housing stock well enough to quote honestly before we ever set foot in your attic. If you want the price in writing first, call Linden Air Duct San Antonio at (430) 233-7681.
Key Takeaways:
- Castle Hills homes average 1 to 3 HVAC systems; most quotes fail to account for multiple attic air handlers.
- Per-system pricing is the only honest way to quote a 1970s ranch with 300+ linear feet of ductwork.
- Documentation matters: you cannot see inside your ducts, so camera inspection photos should be standard.
- Every Linden job includes a written price before work starts and the 365-Day Done Right Promise.
Why Linden Air Duct San Antonio Is Castle Hills’s Preferred Air Duct Cleaning Company
Most Castle Hills homeowners who call us have never had their ducts cleaned, and a good number of them are not sure anyone has looked inside them since the house was built. That changes on the first visit. We send every Castle Hills customer the technician’s name and photo before arrival, and that technician shows a photo ID badge at the door. We know that letting a stranger into your home is a real decision, especially for people who are home alone, parents with young kids, and older homeowners. The Threshold Standard is how we do things here: every technician is background-checked, identity-verified, and arrives in a clean, marked uniform. That has been the standard since 2004, as part of the Threshold Group family.
Marcus Veale, who leads our team, insists on one thing above all: the customer should never be surprised by an invoice. Every job we do in Castle Hills gets a written price before any equipment comes off the truck. That is not a promotion. It is how we quote, every single time.
When something goes wrong, we answer. Every repair we make is covered by a written guarantee, and if a covered repair fails within 365 days, we return at no charge to fix it. That is the 365-Day Done Right Promise, and it is written into every job sheet.
Styles & brands we work with
HVAC Duct Cleaning in Castle Hills
HVAC Duct Cleaning in Castle Hills almost always means working with attic-mounted air handlers, long flex-duct runs, and multiple zones, because that is how these homes were built. A typical job here involves negative-pressure extraction, which means we seal the system under vacuum and use rotating brushes and HEPA filtration to pull contaminants out without blowing them back into your living space. What we do before cleaning matters just as much: we run a camera through the supply and return ducts to look for collapsed flex, disconnected joints, and debris that has been sitting in the system since the Carter administration.
Multiple Systems, Multiple Runs
When a Castle Hills home has three air handlers, each one gets its own quote. System two might be a short run serving a guest wing and be relatively clean. System three might run the full length of a hot attic over the master suite and be packed with decades of dust and insulation particles. Cleaning all three for one flat “whole house” price means someone is losing money or cutting corners.
What It Costs Here
For a single-system home in Castle Hills, expect $450 to $650. A two-system home generally runs $800 to $1,400. A three-system ranch with long attic runs typically lands between $1,500 and $2,800, depending on run length and how much contamination has accumulated. We give you that number in writing before we start.
Vent Cleaning in Castle Hills
Vent Cleaning in Castle Hills covers the supply and return registers, boots, and the immediate duct sections behind them, which is where a surprising amount of visible dust, pet hair, and debris collects. Many Castle Hills homeowners ask us to include vent cleaning alongside full duct cleaning because the registers in these older homes are often painted over, caulked in place, or warped from decades of South Texas heat. We remove each register, clean the boot, and reseat it properly.
Supply and Return Vents
Supply vents push conditioned air into your rooms; return vents pull air back to the air handler. If the return side is clogged, your system works harder and pulls dust from every room in the house. In Castle Hills, we find return vents that have not been opened in 20 years, and the amount of accumulation behind them is often the single biggest air quality problem in the house.
When a Remodel Happened
Castle Hills has seen steady remodeling for two decades. Drywall dust, sawdust, and construction debris from those projects ends up in the vent boots and the first few feet of duct. We see it on nearly every remodeled home we clean. Vent cleaning after a remodel is not optional if you want the work to mean anything.
Common Air Duct Cleaning Problems We See in Castle Hills Homes
- Collapsed flex duct in hot attics: South Texas attic temperatures routinely exceed 140°F. Flex duct from the 1980s breaks down under that heat, collapsing and choking airflow. If we find collapsed sections, we tell you before cleaning, because cleaning around a collapsed run is wasted money.
- Disconnected supply joints pulling in insulation: Long attic runs put stress on connections, and when a joint separates, the system starts pulling loose fiberglass insulation into your air stream. You breathe it. We find and repair these during the inspection, not after you complain about dust.
- Decades of original ductwork never touched: Homes built in the 1970s in Castle Hills often still have original sheet metal or early flex duct. That is 40 to 50 years of dust, pet dander, and biological growth. One cleaning does not undo five decades, but it removes what is there and gives you a clean baseline.
- Uneven cooling between zones caused by duct problems: When one bedroom is 10 degrees warmer than the living room, Castle Hills homeowners usually assume the AC unit is failing. Often it is a duct issue. Our camera inspection finds it, and our written report explains it in plain language.
Pricing for Air Duct Cleaning in Castle Hills, TX
Here is what an honest quote for Air Duct Cleaning in Castle Hills looks like. A single HVAC system in a smaller ranch or a home built in the 1990s runs $450 to $650. A two-system home typically runs $800 to $1,400. A sprawling 1970s to 1980s ranch with three attic-mounted air handlers and 300 to 400 linear feet of ductwork runs $1,500 to $2,800. What moves the number: run length, the number of returns, how much contamination has built up, and whether we find collapsed flex or disconnected joints that need repair. You get that number in writing before any work begins. No per-vent math, no surprise invoices, no bait-and-switch. Call (430) 233-7681 for a free estimate with camera inspection.
See the difference
Before
After
Before
After
Before
AfterVCastle Hills’s Climate and Your Ducts: What Actually Happens
Castle Hills sits in a hot, humid band of South Texas where air conditioning runs from March through November and often into December. That near-constant run time means moisture accumulates inside ductwork, especially in the return side, and that moisture is what allows mold and bacteria to take hold. Then the temperature swings: 100°F outside, 72°F inside, day after day, for months. Those cycles stress every duct seal and connection in the attic. It is not a theory. It is the reason we find so many separated joints and collapsed runs in Castle Hills, and it is why a simple “blow and go” cleaning without inspection does almost nothing for these homes. The real work in Castle Hills is finding what broke in the attic and fixing it, then cleaning the whole system so what you breathe is actually clean.
We Also Serve Cities Near Castle Hills
Our crews work throughout the San Antonio metro, including Castle Hills, Selma, Fair Oaks Ranch, and Alamo Heights. If you are in one of those areas and want the same written pricing and camera documentation, call us and ask for the Castle Hills team. We coordinate scheduling from our Dallas-Fort Worth office, but the technicians who come to your door are local to the San Antonio area.
Trusted Brands We Service in Castle Hills
We clean and service systems built around equipment from Rotobrush and Nikro, the two brands we run ourselves for professional-grade cleaning. For filtration and air quality, we work with products from Honeywell and Aprilaire, which we can recommend and install where a Castle Hills home needs better media filtration or a UV treatment system. If your home has an older Aprilaire media cabinet or a Honeywell electronic air cleaner that has not been opened in years, we service those too. Parts for common San Antonio-area systems are available locally, which keeps turnaround tight for Castle Hills customers.
Serving Castle Hills, TX - Our Local Coverage Area
We’re based in the Castle Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Cleaning in Castle Hills
Per-system pricing means we quote each HVAC system individually, because each has its own air handler, its own duct run length, and its own contamination level. A Castle Hills ranch from the 1980s might have a short system serving the guest wing that is lightly used, and a long system running over the master suite that has been pulling insulation for years. Cleaning all three for one flat price is how the cheap bids undercut the work: either they only clean part of the house, or they rush all three systems and leave the worst contamination in place. With per-system pricing, you see exactly what each system costs and what each system needs. Call (430) 233-7681 and we will walk the house with you and give you a per-system quote in writing.
You should expect camera inspection photos before and after, for every system in the house. Ductwork is invisible by nature, and in a Castle Hills attic, you are not climbing up there to verify the work. We run a camera through the runs before cleaning so you can see the contamination, and again after so you can see the cleaned surfaces. We hand over those photos. If a company will not show you before-and-after documentation, you cannot verify the work happened. That is exactly the situation that allows bad actors in this trade to charge for work they never performed. Our documentation is part of every Castle Hills job, not an upsell.
Yes, they are common, and yes, you should fix them before or as part of cleaning. Castle Hills attics get extremely hot, and that heat breaks down 1980s-era flex duct. We recently cleaned a ranch off West Ave with three systems and found two collapsed flex sections and one disconnected supply joint in the hottest part of the attic. The joint had been pulling loose insulation into the air for months. Cleaning around that would have been pointless. We pull a camera before cleaning specifically so we can hand you a list of what is broken and a price to fix it. Fix first, then clean. That order matters.
It can, and the homes in Castle Hills with original 1970s ductwork are often the worst offenders. Those systems have had 40 to 50 years to collect dust, pet dander, pollen, and in many cases loose fiberglass insulation from deteriorating duct liners. That is what you breathe every time the AC cycles. After source removal with HEPA filtration, and after repairing any disconnected joints, homeowners in Castle Hills tell us they notice a real difference within days: fewer allergy symptoms, less dust on furniture, better airflow. The improvement is most pronounced in homes where the original ductwork was never cleaned and where a joint or two had separated. Call us at (430) 233-7681 if that sounds like your house.
Start with a camera inspection of each system. In a three-system Castle Hills home, it is common for one system to be heavily contaminated while another is relatively clean. Maybe one system serves a wing that was rarely used, and another serves the main living areas and all the bedrooms. The camera tells us what is actually in there. We do not sell cleaning where it is not needed, and we do not skip a system that is visibly dirty just because the quote looks better. You get a written per-system recommendation and you decide. If you want an honest second opinion on what is actually inside your ducts, call (430) 233-7681.
Written by Marcus Veale, Owner at Linden Air Duct San Antonio, serving Castle Hills since 2004.