Duct Sanitizing & Antimicrobial Treatment in Alamo Heights
EPA-registered antimicrobial treatment — after cleaning, never instead of it.
01Alamo Heights — the housing record
What Alamo Heights actually has behind its walls.
Before anyone quotes a duct job here, this is the stock they are quoting against. It is public Census data, and it is different in every city we cover.
- Housing units
- 3,581
- Built pre-1980
- 67%
- Built 2000s
- 10%
- Built since 2010
- 6%
- Gas heat
- 44%
- Electric heat
- 51%
- Single-family
- 64%
U.S. Census Bureau, American Community Survey 5-Year Estimates (2023), tables B25034, B25040 and B25024. Percentages are rounded and describe the city, not your house.
What that means for ducts
Retrofit-era ductwork
About 67% of Alamo Heights's homes went up before 1980, which is before central air was designed into a house rather than added to it. Duct runs in that stock were threaded through attics and crawl spaces after the fact, often more than once, and the flex in them has had decades of Texas attic heat. Expect route surprises, expect joints that have worked loose, and expect a system nobody has opened.
That is a reading of the city’s stock, not a diagnosis of your home. Which of it applies to you is exactly what the camera settles — and why we would rather run one than quote from a postcode.
02Working in Alamo Heights
The part that changes from street to street.
Most of what stands inside the Alamo Heights city limits predates the era when central air was designed into a house rather than added to it. On these 78209 streets, Spanish Colonial, Tudor revival and 1920s bungalow stock, the ductwork was threaded in later: through attics that were never meant to be conditioned, through pier-and-beam crawl spaces, around plaster walls that left no room for a chase. What you have is a retrofit, sometimes the second or third one, and no two houses on the same block took the same path. So we map the system before we clean it. Heating here is split roughly down the middle between gas furnaces and electric equipment, which means neighbors can have genuinely different dust and humidity behavior. And the live oak canopy that makes these streets what they are loads returns hard from late December through March. Sometimes the honest answer is better filtration, not a cleaning.
The Argyle
- Olmos Park line ·
- Terrell Hills ·
- Lower Alamo Heights ·
- Cambridge
County
Bexar County
Same standard in Alamo Heights as everywhere else.
Source removal to the NADCA ACR standard, a written quote before anything is touched, and camera photographs of your own runs before and after. We are not going to re-argue that on every city page — it is set out once, in full, on the service page.
- Surface-prep verification — treatment goes on cleaned ducts only
- EPA-registered, HVAC-labeled product applied per label directions
- Treated areas documented with photos
- Product name and label information left for your records
- From
- $149
- On site
- 45–60 minutes as an add-on
- Scope
- 4 lines
Prices shown are starting estimates and may change with the condition, access, and scope we find on site. Only a written quote from an on-site visit is a price we commit to.
03Duct Sanitizing & Antimicrobial Treatment — in this stock
Treatment in stock with a moisture history.
Older houses are where microbial indications actually turn up, usually downstream of a moisture event nobody logged. Two rules apply and neither is negotiable: the source of the moisture is addressed first or the growth returns regardless, and porous material such as duct-board liner cannot be effectively cleaned — that is replacement work, not treatment. We will tell you which of the two you are looking at before anything is applied.
Is the antimicrobial treatment safe for my family and pets?
We only use products EPA-registered specifically for use in HVAC systems, applied exactly as the label directs — including any re-entry and ventilation instructions, which we walk you through before we start. You also get the product name and label documentation for your records.
Why won't you sanitize without cleaning first?
Because fogging product over a layer of dust treats the dust, not the duct surface — the buildup simply shields what's underneath. It wastes your money and violates the spirit of the label.
04Book in Alamo Heights
Three fields, and a person calls you back.
Tell us the ZIP and we will tell you what your system likely needs — including, sometimes, that it needs nothing yet. Nothing is charged until you have approved a written quote.
05Questions
Asked in Alamo Heights, answered straight.
Is the antimicrobial treatment safe for my family and pets?
We only use products EPA-registered specifically for use in HVAC systems, applied exactly as the label directs — including any re-entry and ventilation instructions, which we walk you through before we start. You also get the product name and label documentation for your records. No off-label products, no improvised mixes, ever.
Why won't you sanitize without cleaning first?
Because fogging product over a layer of dust treats the dust, not the duct surface — the buildup simply shields what's underneath. It wastes your money and violates the spirit of the label. Source removal first, then treatment where there's a documented indication. Any company that offers it the other way around is selling theater.
Our Alamo Heights house sits on pier-and-beam. Do ducts under the floor need different attention than attic runs?
Yes. Crawl-space trunks live in unconditioned, humid air, and older under-floor insulation absorbs moisture instead of shedding it. We look for sagging supports, rodent entry at the perimeter and torn liner before quoting anything. In a lot of these 78209 houses the finding turns out to be a repair rather than a cleaning.
Will duct cleaning help with the live oak pollen that coats everything here each spring?
Only partly, and we would rather you knew that up front. Oak pollen mostly enters through doors, windows and envelope leaks, then gets recirculated. Cleaning removes what has already settled inside the system; it does not stop next week's load. A properly sized, well-sealed return filter does considerably more for you.
The house dates to the 1930s and the ducts have never been cleaned. Is that a problem by itself?
Age alone is not a reason. EPA has never shown that routine cleaning prevents illness. What we actually find in Alamo Heights retrofits is more often mechanical: a run disconnected above a plaster ceiling, a crushed elbow, a boot that lost its seal decades ago. That is worth fixing on its own merits.
Duct Sanitizing & Antimicrobial Treatment nearby
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