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 HVAC Cleaning Across Castle Hills
HVAC cleaning in Castle Hills, TX typically runs $350 – $650 for a full system cleaning on the average mid-century ranch or two-story home here, and most jobs are finished in under a day. The math changes fast when live oaks drop pollen into your return ducts, which they do every single spring in this part of Bexar County. We’re Cardinal Air Duct San Antonio, led by Omar Haddad, and we clean the coils, blowers, air handlers, and duct runs that keep Castle Hills homes breathing through long South Texas summers. Call (254) 347-3897 for a free estimate and a written price before we touch a single vent.
Why Cardinal Air Duct San Antonio Is Castle Hills’s Preferred HVAC Cleaning Company
Castle Hills is a specific kind of place. The homes off West Avenue, Honeysuckle Lane, and Loop 410 frontage roads were built mostly between the 1960s and 1980s, and a lot of them still run their original duct lines through unconditioned attics. That means our techs walk into attics that hit 130°F in July and find flex duct that’s been baking for forty years. We know what that does to airflow. We know what it does to your electric bill. And we know how to fix it without turning your hallway into a construction zone.
Customers across Castle Hills keep calling us back for one reason: we show up with professional-grade equipment from Rotobrush and Abatement Technologies, we hand over a written price before the first panel comes off, and we document everything with before-and-after photos. Dispatch and scheduling for Castle Hills is coordinated through our metro office, and a live person answers calls around the clock. If the work isn’t done right within 365 days, we return and correct it at no charge. That’s the 365-Day Done Right Promise, and it applies to every job, no exceptions.
Styles & brands we work with
AC Duct Cleaning in Castle Hills
AC Duct Cleaning in Castle Hills means pulling live oak pollen, dust, and debris out of the supply and return lines that move conditioned air through your home. On most Castle Hills houses, the return ducts sit in the attic or chase walls where they pull air back to the blower. When those returns clog, your system runs longer, your electric bill climbs, and your house gets dustier between cleanings. A standard AC duct cleaning for a single-system home here runs $350 – $550 depending on the number of returns and the length of the duct runs.
Source Removal, Not Surface Wiping
We run negative-pressure extraction, meaning the loosened debris goes straight into a HEPA-filtered vacuum rather than back into your living room. A rotary brush system works the interior walls of each duct run to dislodge packed pollen and dust. The result is a clean interior surface, not just a lighter dust layer.
When Castle Hills Homeowners Need It
Most homes around here need AC duct cleaning every 3 – 4 years, but homes under heavy oak canopy may need it every 18 – 24 months. If your return grille looks like it’s wearing a yellow-green sweater in March, the ducts behind it are not in better shape. Spring is our busiest season in Castle Hills for a reason.
Furnace Cleaning in Castle Hills
Furnace Cleaning in Castle Hills still matters, even though winter here is short. Most homes in this area run gas furnaces in closets or attic utility rooms, and those furnaces share ductwork with the AC system. Every summer, the blower pulls pollen-laden air across the heat exchanger. By fall, that exchanger carries a layer of dust that burns off as a faint smell the first cold snap you run the heat. A full furnace and duct cleaning on a typical Castle Hills home runs $300 – $500 when bundled with AC duct cleaning.
Blower And Heat Exchanger Cleaning
The blower wheel in a Castle Hills HVAC system collects a thick coat of pollen and dust that reduces airflow in both summer and winter. We pull the blower, clean each wheel fin, and inspect the heat exchanger for cracks or carbon buildup. A clean blower moves more air with less energy and less strain on the motor.
Coil Treatment After Cleaning
After the ducts and blower are clean, we treat the evaporator coil and blower housing with an antimicrobial treatment that slows regrowth until the next scheduled cleaning. On Castle Hills systems that sweat heavily in humid conditions, this step makes a real difference.
Trusted Brands We Service in Castle Hills
Our technicians work on every major HVAC brand found in Castle Hills homes, and we keep common filters and treatment products from Aprilaire and Guardsman stocked for local jobs. Whether your system is a Trane from the original build or a newer Carrier replacement, the cleaning procedure adapts to the system rather than forcing it. We also install aftermarket filtration upgrades that make sense for pollen-heavy Castle Hills properties, and we can source specialty parts same-week from our supply chain.
See the difference
Before
After
Before
After
Before
AfterCommon HVAC Cleaning Problems We See in Castle Hills Homes
- Live oak pollen packing return ducts. The towering live oaks along older Castle Hills streets dump enormous pollen loads every spring, and the return grilles pull that material straight into the duct system until airflow drops and dust coats every room.
- Uninsulated flex duct sweating in the attic. Many 1960s – 1980s homes here have flex duct with little or no insulation left, and the humid South Texas air condenses on the cold duct surface, feeding mold inside the runs.
- Attic duct seams separating under thermal cycling. The attic bakes during the day and cools at night. Over years, the tape and mastic joints pull apart, letting dusty attic air into the supply ducts. If you clean but don’t seal, you recontaminate within weeks.
- Blower motors caked with pollen and lint. The blower wheel becomes unbalanced and the motor works harder, shortening its life. A cleaning restores balance and airflow before the motor fails entirely.
Pricing for HVAC Cleaning in Castle Hills, TX
A full HVAC cleaning in Castle Hills, TX, including supply and return ducts, blower cleaning, and evaporator coil treatment, runs $350 – $650 for most homes. Larger two-story properties with dual systems or extensive attic duct runs can reach $700 – $900. Smaller single-system ranch homes under 1,800 square feet often fall in the $300 – $450 range. The main factors are the number of returns, the length and accessibility of duct runs, and whether sealing is needed after cleaning.
| Service | Typical Castle Hills Price Range |
|---|---|
| AC Duct Cleaning | $350 – $550 |
| Furnace Cleaning | $300 – $500 |
| Evaporator Coil Cleaning | $150 – $300 |
| Blower Cleaning | $120 – $250 |
| Full HVAC Cleaning (ducts + blower + coil) | $350 – $650 |
Call (254) 347-3897 for a written quote. We hand it to you before work begins, and it does not change at the door.
We Also Serve Cities Near Castle Hills
Our crews cover Castle Hills directly and also serve homeowners in San Antonio, New Braunfels, Cibolo, and Converse. If you’re just outside the Castle Hills city limits, we can usually reach you on the same schedule as our local visits, and the pricing stays consistent across the northeast San Antonio metro.
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 HVAC Cleaning in Castle Hills
Every 18 – 24 months is realistic for Castle Hills homes with mature live oak canopy. The pollen load here is heavy enough to clog return ducts within a single spring season. Homes without large oaks nearby can typically go 3 – 4 years between cleanings. Call (254) 347-3897 for a free estimate and we’ll tell you what your system actually needs after seeing it.
Yes. Castle Hills attic flex duct often sits in unconditioned spaces where temperatures exceed 130°F in summer, which makes the inner liner brittle. We use lower-agitation rotary brush settings and negative-pressure extraction to protect aging flex duct while still removing the pollen and dust packed inside. If the duct is too deteriorated to clean safely, we’ll tell you straight and quote replacement instead.
Yes. The blower wheel and air handler are accessible components, and we clean them as part of the full HVAC cleaning package. Pollen coats the blower fins, throws the wheel out of balance, and then redistributes through every supply vent. Removing it restores airflow and reduces the seasonal allergy load inside your Castle Hills home.
For most Castle Hills residents, yes, especially if the ducts have not been cleaned in years. The duct system recirculates air and whatever is stuck inside it. When pollen clogs the returns, the system keeps pushing those allergens through the house long after the outdoor pollen count drops. A clean system with a fresh filtration upgrade from Aprilaire gives your HVAC a fighting chance during oak season. Call (254) 347-3897 and we’ll walk you through what makes sense for your home.
Yes, because the same ducts move air in both seasons. Summer air conditioning pushes pollen through the furnace, and that material settles on the heat exchanger and blower. When you finally run the heat in November, you’re burning off months of accumulated dust. A furnace cleaning before the first cold snap improves efficiency and eliminates that smell. Our furnace cleaning in Castle Hills runs $300 – $500, less when bundled with AC duct cleaning.
We pulled a camera inspection on a mid-century ranch off West Avenue where return ducts were packed with live oak pollen and attic flex duct had collapsed under South Texas heat. Our techs used negative pressure and Rotobrush agitation tools to perform source removal on the supply and return ducts, then sealed the attic penetrations to stop recontamination before the next pollen drop. That is the difference between a clean system and a clean-looking system.
If your Castle Hills home has original ductwork, mature oaks, or a spring allergy season that lasts until June, call (254) 347-3897. We’ll answer in person, schedule a visit, and give you a written price before any work begins.
Written by Omar Haddad, Owner at Cardinal Air Duct San Antonio, serving Castle Hills and the surrounding metro with HVAC cleaning, air duct cleaning, and dryer vent cleaning.