Is Your Home’s Air Making You Sick?
It Might Be Your Ducts.

Professional Air Duct Cleaning & Duct Sealing in San Antonio, TX | Pepcal Heating & Air

That Dust Isn’t Going Away on Its Own — And Neither Is the Problem

You change the filters. You clean the house. But the dust keeps coming back, one room never cools down, and your energy bill climbs every month. Sound familiar? Before you call it a mystery, check your ductwork — because in most San Antonio homes, dirty, leaking air ducts are the hidden cause behind all three.

At Pepcal Heating & Air, we’ve been diagnosing duct problems in Alamo Ranch, Helotes, Leon Valley, and Northwest San Antonio since 2013. We’re going to tell you the truth: sometimes you need a professional air duct cleaning in San Antonio. Sometimes you need duct sealing. Sometimes both. And sometimes neither — and we’ll tell you that too, before you spend a dime.

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What’s Actually Living in Your Ductwork

Every time your HVAC system kicks on, it’s pushing air through every duct run in your home — and pulling air back through your return. If those ducts haven’t been cleaned since construction, or your home has had renovation work done, that air is carrying years of accumulated dust, drywall debris, mold spores, pet dander, and allergens directly into your living spaces.

For families dealing with allergy symptoms, asthma, or unexplained respiratory issues, a thorough air duct cleaning removes the biological buildup that’s recirculating through your home every single day. The improvement is real and noticeable — not a sales pitch.

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Signs Your Ducts Need a Professional Look

Your home has never had the ducts professionally cleaned or inspected since it was built. Dust builds up quickly no matter how often you clean or change filters. Rooms far from the air handler — especially upstairs — never reach the temperature on the thermostat. Energy bills keep climbing even though your equipment seems fine. You’ve had recent renovation work done with the HVAC system running. Allergy or respiratory symptoms are noticeably worse at home than anywhere else.

None of these automatically mean you need a full cleaning or replacement. But all of them are worth an honest evaluation.

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The Bigger Problem: Duct Leakage

Here’s what most companies won’t lead with: in many San Antonio homes, duct leakage is a bigger problem than dirty ducts. And cleaning won’t fix it.

When duct connections are improperly sealed or flex duct develops gaps over time, conditioned air escapes into your attic before it ever reaches your rooms. On the return side, leaky ducts pull unconditioned air — dust, insulation particles, and attic heat — directly into your air stream. The Department of Energy estimates the average home loses 20–30% of conditioned air through duct leakage. In some homes we service in West and Northwest San Antonio, it’s even higher.

That’s not an air quality issue. That’s money pouring into your attic every month.

Professional duct sealing closes those gaps and restores delivery efficiency. Homeowners who get significant duct leakage corrected consistently see better room-to-room comfort, less dust, and lower energy bills — because their system is finally delivering air to the rooms it was designed to reach.

Pepcal Heating & Air — Family-Owned · Faith-Based · Northwest San Antonio. Doing it right since 2013.

Our Duct Services in San Antonio

Systems designed

Air Duct Cleaning

For homes with significant debris buildup, post-renovation contamination, visible mold, or pest activity in the ductwork. We do it right with proper equipment, not a quick brush-and-vacuum pass.
Premium craftsmanship

Duct Sealing

For homes losing conditioned air through leaky connections and joints. If your rooms never reach the thermostat temperature or your bills don’t make sense, this is often the first fix that actually works.
technician

Duct Replacement

For older systems with collapsed flex duct, poor original design, or damage beyond effective sealing. We’ll tell you when replacement is the right call — and when it isn’t.
Honest recommendations

Blown-In Insulation Upgrades

Attic duct runs that aren’t properly insulated lose conditioning to the surrounding heat before it ever reaches your home. We address the full picture.
Serving Northwest San Antonio

Indoor Air Quality Solutions

Air Scrubber by Aerus whole-home purification and MERV 11–13 media filtration for families who need more than clean ducts alone can provide.

Frequently Asked Questions

How much does air duct cleaning cost in San Antonio?
Pricing varies based on the size of your home and the condition of your duct system. We give honest, upfront estimates after evaluating what your system actually needs — not a low teaser price that doubles once we’re in your home. Call us for a straightforward quote.
How often should air ducts be cleaned in San Antonio?
There’s no one-size-fits-all schedule. The EPA recommends cleaning when there’s a specific reason — visible mold, pest activity, post-renovation debris, or significant buildup. For most well-maintained San Antonio homes, every 5 to 10 years is reasonable. We’ll tell you honestly where your home stands.
My house is newer — do I still need duct cleaning?
Possibly. Newer construction in San Antonio frequently has drywall dust, sawdust, and insulation particles left inside the duct system from the build process. It’s one of the most legitimate reasons to clean ducts in a home that’s only a few years old. We can evaluate whether your home falls into that category.
How long does a duct cleaning take?
For a typical San Antonio home, a thorough cleaning takes two to four hours. Larger homes or systems with heavy buildup may take longer. We don’t rush it — a fast pass that doesn’t actually clean the system isn’t worth anyone’s time or money.
How do I know if I need duct cleaning or duct sealing?
They solve different problems. Cleaning removes debris and buildup from inside the ducts. Sealing closes gaps and leaks that let conditioned air escape into your attic. A lot of homes need sealing more urgently than cleaning — but we won’t know until we evaluate your specific system. That’s always our first step.
Will duct cleaning help with allergies?
It can, especially when the duct system contains mold spores, dust mite debris, or accumulated pollen. But cleaning alone is rarely a complete solution. Pairing it with duct sealing and upgraded filtration — like MERV 11–13 media filters or an Air Scrubber by Aerus — typically delivers the most consistent relief for allergy and asthma sufferers.
Can dirty ducts cause high energy bills?
Yes — but leaking ducts are usually the bigger culprit. If conditioned air is escaping into your attic through gaps and unsealed joints, you’re essentially paying to cool space that does nothing for your comfort. Duct sealing directly addresses that waste and is one of the most cost-effective improvements a San Antonio homeowner can make.
Do you serve my neighborhood?
We serve homeowners throughout Alamo Ranch, Helotes, Leon Valley, West San Antonio, Northwest San Antonio, and the Loop 1604 Corridor. If you’re not sure whether we cover your area, give us a call — we’re happy to confirm.

Schedule Your Duct Evaluation in San Antonio

If you’re dealing with poor indoor air quality, uneven cooling, high energy bills, or airflow problems in Alamo Ranch, Helotes, Leon Valley, or Northwest San Antonio — we’ll tell you what’s actually causing it and what will actually fix it.

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Schedule Your Duct Evaluation

(210) 460-3821