UV Air-Purification Light Installation in San Marcos
UV-C lamps installed where moisture lets microbes grow.
01San Marcos — the housing record
What San Marcos 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
- 29,892
- Built pre-1980
- 15%
- Built 2000s
- 30%
- Built since 2010
- 31%
- Gas heat
- 26%
- Electric heat
- 71%
- Single-family
- 34%
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
New-build ductwork
Roughly 31% of San Marcos's homes were built since 2010. New does not mean clean: the commonest thing we pull out of a five-year-old system is the construction phase itself — drywall fines, sawdust, insulation fiber — plus builder-grade flex that was kinked or crushed on the day and has been throttling that run ever since. Photographs matter more here, not less.
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 San Marcos
The part that changes from street to street.
Two thirds of the housing in San Marcos is not a detached house, and most of that is built for students, which changes both what the system looks like and who is able to do anything about it. In a purpose-built block the unit has a closet air handler, a short run to each bedroom and one return grille, and per-bedroom leases put four adults on four different schedules through the same system for nine months. There is very little duct in play. What matters is whether the filter is the right size and actually seated, and what the coil and drain pan in that closet look like, because in Hays County humidity that is where anything biological begins. Heat is electric nearly everywhere here, so there is no furnace and no flue to inspect. The other San Marcos case is the older neighborhoods off the square, family houses now leased by the room, carrying far more occupancy and far more moisture than the system was ever sized for.
the headwaters at Spring Lake
- Texas State / The Square ·
- Blanco Vista ·
- Kissing Tree ·
- Willow Creek
County
Hays County
Same standard in San Marcos 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.
- UV-C lamp sized and positioned for your coil and plenum layout
- Mounting that shields wiring and plastic components from UV exposure
- Clean electrical connection with a full operation check
- Bulb-replacement schedule and owner walkthrough
- From
- $399
- On site
- 1–2 hours
- 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.
03UV Air-Purification Light Installation — in this stock
Treatment in new stock — usually the wrong purchase.
In a house built since 2010 there is rarely a documented indication for an antimicrobial or a UV lamp, and we will normally say so. Where a UV light does earn its place here it is a coil-hygiene decision on a system that runs long humid cycles, not an air-purity claim. If someone has quoted you a treatment on a five-year-old system without showing you a reason on camera, ask what the reason was.
Will a UV light purify the air in my whole house?
Not by itself, and we'll never claim otherwise. Air moves past the lamp too quickly for much single-pass effect; UV's real work is keeping continuously wet surfaces — coil area, drain pan — clean, which prevents the microbial growth and odor that start there.
How often does the bulb need replacing?
Annually, as a rule. Germicidal output fades long before the visible glow does, so a lamp can look alive while doing little.
04Book in San Marcos
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 San Marcos, answered straight.
Will a UV light purify the air in my whole house?
Not by itself, and we'll never claim otherwise. Air moves past the lamp too quickly for much single-pass effect; UV's real work is keeping continuously wet surfaces — coil area, drain pan — clean, which prevents the microbial growth and odor that start there. Think of it as surface hygiene that complements filtration, not a force field.
How often does the bulb need replacing?
Annually, as a rule. Germicidal output fades long before the visible glow does, so a lamp can look alive while doing little. We put a dated label at the unit when we install, show you the swap procedure, and the replacement is a simple, inexpensive routine from there.
We manage student units. What is actually worth doing at turnover?
Open the closet, not the duct. Pull and photograph the coil, flush the condensate line, confirm the filter rack seals and note the condition of the pan. In a unit with fifteen feet of supply, a duct cleaning is close to theater and the coil is where the complaints come from. If a specific unit shows debris at the registers we will say so and treat that one.
Our apartment smells musty when the AC starts and the office says the ducts need cleaning.
Ask for the coil and drain pan to be checked instead, in writing. Odor that appears in the first minute of a cycle and then fades is the classic signature of a wet coil, and it is a maintenance item rather than a duct job. Putting it in writing matters more than the wording, because a comment at the leasing desk creates no record.
We rent an older house near the square with five of us in it.
The system in that house was sized for a family and it is now working against five people's showers, cooking and laundry. High occupancy raises the moisture load faster than the dust load, so the honest priority is humidity and return capacity, not cleaning. We would rather measure it and tell you the equipment is outmatched than sell a service that changes nothing.
UV Air-Purification Light Installation nearby
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