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.
Honeywell Vent Sanitizing: The The Woodlands Owner’s Guide
CleanRun stocks and installs Honeywell-compatible vent sanitizing systems for The Woodlands homes, with typical installed pricing from $340 to $580 per system depending on ductwork configuration and whether the existing plenum requires modification. Most Honeywell UV100E, UV100A, and compatible REME HALO retrofit jobs are completed in a single visit because we carry the full mounting kit, 16-inch or 18-inch lamp options, and the 24V transformer on every truck. We are an independent service provider, not affiliated with Honeywell.
Most owners in The Woodlands discover their vent sanitizing system has failed when they notice the blue UV-C lamp is no longer visible through the viewport, or when spring allergy symptoms persist despite new HVAC filters. The bulb in a Honeywell UV100E series typically degrades to 60% output after 9,000 hours, which in a climate where systems run 10 months a year means roughly 12 to 14 months of actual service, not the 24 months printed on the box.
Which Honeywell Models This Applies To
The Honeywell UV100E series is the most common retrofit we encounter in The Woodlands, particularly in homes built 2015 to 2022 with single-return systems. The UV100E3007, UV100E2009, and UV100E1043 all use the same RUVBULB1 or RUVLAMP1 replacement lamp, but the mounting bracket geometry differs. The UV100A is the older contractor-grade series; its lamps are not interchangeable with the E-series despite similar wattage. We verify the model number on the sticker inside the access panel, measure the duct width at the proposed mounting location, and confirm whether the existing transformer is 120V or 240V before quoting.
We stock OEM Honeywell lamps and also carry quality aftermarket equivalents from Guardsman that meet the same 253.7 nanometer UV-C output specification. The aftermarket lamps cost 20% to 30% less and carry the same 365-Day Done Right Promise. For the electronic ballast and transformer, we use Honeywell OEM only; the aftermarket ballasts we have tested show higher failure rates in Gulf Coast humidity, where attic temperatures in The Woodlands regularly exceed 140°F in July and August.
Signs Your Honeywell Vent Sanitizing Is Failing

- The viewport shows darkness or faint purple glow instead of bright blue. A healthy UV-C lamp produces a distinct blue-white light. When the mercury vapor degrades, the output shifts toward visible purple, which indicates the germicidal wavelength has already dropped below effective levels. The lamp may still “light” and yet do nothing.
- Musty or sour odors return within 48 hours of HVAC cycling. The UV lamp’s job is to inhibit microbial growth on the evaporator coil and in the drain pan. When output drops, mold and bacteria reestablish colonies quickly in The Woodlands’ 70%+ average humidity, and the smell circulates through every register.
- Visible mold on the coil despite regular filter changes. This is the symptom that usually prompts the call. Homeowners in Grogan’s Mill and Alden Bridge have shown us photos of black spotting on coils that were clean six months prior. The lamp was running, but at insufficient intensity.
- The lamp fails to strike after power cycling. If the lamp flickers and dies, the ballast is often the culprit, not the bulb. Ballast failure is more common in unconditioned attics where thermal cycling stresses the electronics. We test both components before quoting replacement.
- Annual energy costs rise without explanation. A failing ballast draws excess current while delivering reduced output. We have measured 15% to 20% higher draw on degraded ballasts during diagnostic visits in Panther Creek homes.
Before
AfterReplacement Cost & What’s Included
Our installed pricing for Honeywell vent sanitizing in The Woodlands follows Haven Standard Clause 1: the written price is delivered before any work starts.
| Component / Service | Price Range |
|---|---|
| Lamp replacement only (OEM Honeywell RUVBULB1) | $180 - $240 |
| Lamp replacement (Guardsman equivalent) | $140 - $190 |
| Ballast and lamp replacement | $280 - $380 |
| Complete new UV100E-series installation | $340 - $580 |
| Duct modification or custom mounting bracket | $75 - $150 additional |
The complete installation includes the lamp, ballast, transformer, mounting hardware, sealed penetration of the plenum or duct wall, and verification of UV-C output with a radiometer. Every job concludes with a Documented Photo Record: the inside of the plenum before work, the installed unit with lamp striking, and the radiometer reading at 12 inches. The 365-Day Done Right Promise covers all components and labor. If the lamp fails or output drops below specification within one year, we replace it at no charge.
DIY or Call Us?

An owner can safely verify the model number, check the viewport for lamp activity, and confirm the breaker is supplying power. What we do not recommend is opening the plenum or handling the lamp itself. The quartz glass of a UV-C lamp is fragile and oils from skin contact create hot spots that lead to premature failure. More critically, an unshielded UV-C lamp causes serious eye and skin injury within seconds of direct exposure. The lamp must be installed with the correct orientation, the viewport sealed properly, and an interlock switch verified, or the system becomes a hazard to anyone servicing the HVAC later.
We have found DIY installations in The Woodlands with lamps mounted downstream of the filter, where they do nothing, or with ballasts wired to constant-hot instead of fan-interlocked power, where the lamp runs 8,760 hours annually and burns out in seven months. The before photo does the talking. Everything else is just paperwork. Call (346) 248-1474 and we will put a written number next to your diagnosis.
FAQs
In The Woodlands’ climate, where HVAC systems run heavily from March through November, realistic lamp life is 12 to 14 months, not the 24 months on the packaging. The 9,000-hour rating assumes moderate use. We recommend annual inspection with radiometer verification. Call (346) 248-1474 to schedule; estimates are free.
No. UV-C lamps are sealed mercury-vapor tubes with no serviceable components. Once output degrades or the filament fails, replacement is the only option. We do repair or replace the ballast and transformer separately when those are the failed components. Call (346) 248-1474 for a free second opinion on any written estimate.
A straightforward lamp replacement takes 45 to 60 minutes. A full ballast replacement or new installation requires 90 minutes to two hours, including testing and photo documentation. We stock Honeywell and Guardsman lamps, ballasts, and mounting hardware on every truck, so most jobs are completed in one visit to The Woodlands.
We stock OEM Honeywell RUVBULB1 and RUVLAMP1 lamps, compatible Guardsman equivalents, ballasts, transformers, and mounting kits on every service vehicle. If your system uses a discontinued UV100A variant, we fabricate compatible mounting solutions in the field. Tomas Reyes and our crew have yet to encounter a Honeywell system in The Woodlands we could not match same-day.
Ready for a written price before any work starts? Call CleanRun Air Duct Cleaning The Woodlands at (346) 248-1474. We will answer with a live person, verify your Honeywell model, and schedule a technician who arrives in uniform, background-checked under Haven Standard Clause 3: Verified Crews, with a name you will know before the truck turns onto your street. Bring any competitor’s written estimate; our Free Second Opinion puts our number next to theirs at no cost.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning The Woodlands at CleanRun Air Duct Cleaning The Woodlands, serving The Woodlands and nearby areas.




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