Whole-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.
Before
After
Before
After
Before
AfterGuardsman Vent Sanitizing: The New Braunfels Owner’s Guide
We stock and install Guardsman-compatible vent sanitizing systems in New Braunfels, with typical installed pricing between $340 and $680 depending on your home’s duct configuration and whether we’re retrofitting or replacing an existing unit. Most Guardsman UV-C or photocatalytic oxidizer installations can be scheduled within 48 hours, and we carry the common 14-inch and 17-inch lamp housings on our trucks. Homeowners usually discover a problem when they notice persistent musty odors near registers despite recent duct cleaning, or when their HVAC technician spots a darkened, flickering lamp during routine maintenance.
Which Guardsman Models This Applies To
Guardsman vent sanitizing falls into two product lines: the UV-C series (GUV-14, GUV-17, GUV-22) and the PCO series with titanium dioxide-coated catalyst grids (GPCO-14, GPCO-17). The number indicates the lamp housing length in inches, and this is where most ordering errors happen. A GUV-14 will not seat properly in a 17-inch plenum opening, and forcing it leaves a gap that bypasses untreated air.
To identify your unit, look for the stamped model number on the lamp housing end cap, visible after removing the access panel. If the label has faded, measure the active lamp length, not the housing. The GUV series uses a straight 254-nanometer UV-C lamp; the GPCO series adds the catalyst grid, which is a separate replaceable component.
We stock OEM Guardsman lamps and housings, plus aftermarket equivalents from Abatement Technologies that meet the same output specs at a lower parts cost. The aftermarket lamps carry the same 9,000-hour rated life, but we always verify ballast compatibility before quoting, since Guardsman ballasts from units manufactured before 2019 use a different pin configuration. CleanRun Air Duct Cleaning New Braunfels is an independent service provider, not affiliated with Guardsman.
Signs Your Guardsman Vent Sanitizing Is Failing
- The indicator light is out or flashing irregularly. This usually means the ballast is failing to maintain consistent voltage to the lamp. In New Braunfels, we’ve found that attic-mounted units fail faster because summer attic temperatures exceed the ballast’s rated ambient, causing thermal shutdown cycles that don’t trip the main fuse but degrade the electronics over time.
- Musty or microbial odors return within weeks of duct cleaning. A functioning UV-C system should suppress bacterial growth on the evaporator coil and in the drain pan. When the lamp output drops below effective levels, usually after 7,000 to 9,000 hours of operation, the biological load rebuilds faster than the remaining UV output can manage.
- Visible darkening or blackening at either lamp end. This is electrode degradation, normal wear for mercury-vapor lamps, but it reduces the effective UV output by 30% or more before total failure. The lamp may still glow faintly while delivering essentially no sanitizing dose.
- The catalyst grid in a PCO unit shows visible dust loading or discoloration. The titanium dioxide coating requires UV activation and regular airflow to maintain its reactive surface. Once the grid is coated with debris, the photocatalytic reaction stops even if the lamp itself is functional.
- Your HVAC technician notes coil fouling during seasonal maintenance. A working sanitizing system keeps the evaporator coil surface biologically inactive. Rapid slime or mold recurrence on the coil, especially in homes near the Comal or Guadalupe rivers where ambient humidity runs high, often traces back to a lamp that failed silently months earlier.
BeforeAfterReplacement Cost & What’s Included
| Service | Price Range |
|---|---|
| UV-C lamp replacement (GUV series, 14″ or 17″) | $340 - $480 |
| PCO lamp + catalyst grid replacement (GPCO series) | $480 - $680 |
| Ballast replacement (if needed) | $180 - $260 additional |
| New installation in homes without existing unit | $580 - $890 |
The range reflects duct accessibility, whether the plenum needs modification for proper lamp positioning, and whether electrical routing from the furnace board is already in place. Every quote is written and agreed before work starts, Haven Standard Clause 1. The price includes the lamp or grid, housing inspection, output verification with a UV meter, and a documented photo record of the installed position. We warranty the installation for 365 days under the Done Right Promise; lamps carry the manufacturer’s 9,000-hour rated life, which in typical New Braunfels runtime equals roughly 12 to 15 months of continuous operation.
DIY or Call Us?
What you can safely check: confirm the unit is receiving 120V at the junction box, verify the fuse or breaker hasn’t tripped, and inspect the lamp for visible darkening or breakage through the access window. Do not remove the lamp housing while powered.
Where DIY goes wrong: UV-C lamps operate at high voltage and contain mercury vapor. Improper handling cracks the quartz envelope, releasing mercury and exposing you to unshielded UV radiation that causes serious eye and skin injury within seconds. The ballast also retains a lethal charge after power-down. We don’t recommend lamp replacement as a homeowner project.
If your lamp is dark and you’re unsure of the model match, call us at (830) 549-6847. We’ll verify compatibility from the stamped housing number and schedule installation, usually within two business days.
FAQs
The rated life is 9,000 hours of continuous operation, which typically translates to 12 to 15 months in a standard residential HVAC system running year-round. In homes near the Gruene Historic District with older ductwork and longer runtime cycles, we’ve seen lamps reach the degradation threshold closer to 11 months. Call (830) 549-6847 and we’ll check your unit’s hour meter if it has one, or estimate based on your HVAC runtime pattern.
Ballasts can sometimes be replaced independently, but UV-C lamps are consumable items with a finite mercury charge and cannot be restored. Catalyst grids in PCO units can be cleaned if lightly loaded, but once the titanium dioxide coating is degraded by UV exposure beyond its effective surface life, replacement is the only option. We assess both components during our inspection and quote only what’s actually needed.
A straightforward swap in an accessible plenum takes 45 to 75 minutes, including output verification. If we need to modify the mounting bracket or run new low-voltage control wiring, plan on 90 minutes to two hours. We photograph the before condition, the installed position, and the meter reading, then deliver the photo record as part of the standard job documentation.
We carry the GUV-14, GUV-17, GPCO-14, and GPCO-17 lamps and housings, plus compatible ballasts and the Abatement Technologies aftermarket equivalents. The 22-inch series and pre-2019 pin-configuration ballasts are warehouse-ordered with next-day availability. We’ll confirm your exact match when you call so we arrive with the correct part.
Key Takeaways
- Match the lamp to the housing number (14″ or 17″), not the plenum opening size
- Darkened lamp ends mean reduced output even if the lamp still glows
- Attic-mounted units in New Braunfels fail faster due to summer heat exposure
- Every job includes written upfront pricing, UV meter verification, and a documented photo record
- 365-Day Done Right Promise backs the installation in writing
We’re also equipped to service Lennox, Trane, and Carrier sanitizing systems if your home uses mixed HVAC brands.
Ready to verify your Guardsman model and get a written price? Call CleanRun Air Duct Cleaning New Braunfels at (830) 549-6847. We’ll confirm your part match over the phone, schedule your installation, and deliver the same documented, upfront-priced service we’ve provided since 2013. Show the photo first. Explain what you’re looking at. Then talk about what happens next.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning New Braunfels at CleanRun Air Duct Cleaning New Braunfels, serving New Braunfels and nearby areas.