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.
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Before
AfterNikro Vent Sanitizing: The Katy Owner’s Guide
We stock and install Nikro-compatible vent sanitizing equipment for Katy homeowners, with installed pricing typically running $340-$620 per system depending on duct count and access. Most jobs we can schedule within 48 hours, and we carry common Nikro sanitizing components on our trucks for the Houston metro. Homeowners usually discover an issue when they notice persistent musty odors returning within days of a standard cleaning, or when their HVAC technician points out that the fogging unit attached to their air handler isn’t drawing solution anymore.
Which Nikro Models This Applies To
Nikro’s vent sanitizing line breaks into two main series we see in Katy homes: the portable fogger units (model prefixes SL200, SL400) and the inline injection systems designed for permanent mounting near the plenum, the main distribution box where heated or cooled air splits into individual duct runs. The portable units have a metal specification plate on the rear housing; inline systems carry the model number on a riveted tag near the solution inlet port.
The critical compatibility gotcha: Nikro changed its solution line diameter from 3/8-inch to 1/2-inch on SL-series units manufactured after 2019. An older replacement pump or hose kit won’t seal on newer equipment, and we’ve found the mismatch only after a homeowner ordered the wrong part online. For inline systems, the injector nozzle must match your ductwork material, galvanized steel versus flex duct, each requiring a different thread pitch.
We source both OEM Nikro components and quality aftermarket equivalents from Guardsman and Abatement Technologies. The aftermarket pumps often outlast OEM in Houston’s hard water conditions, which is worth considering given Katy’s mineral-heavy municipal supply. We document which part we install and why in your written job record.
Signs Your Nikro Vent Sanitizing Is Failing
- Fog output drops to a weak mist or stops entirely. The diaphragm pump has worn or the solution filter is clogged with mineral scale from Katy’s water. We see this most often in homes west of Grand Parkway where water hardness runs higher.
- Solution leaks from the housing base during operation. The pump seal has degraded, typically from running the unit dry or from heat exposure in attics that reach 140°F in August. A leak here means the sanitizing agent isn’t reaching your ductwork at the labeled concentration.
- Odor returns within 72 hours of treatment. The atomizing nozzle has partially clogged, producing droplets too large to suspend in airflow. They settle in the first few feet of duct instead of coating the full run. The camera will show wet spots near the plenum and dry debris further out.
- Unit powers on but makes a grinding sound. The fan bearing in the fogger head is failing. Continued operation will overheat the motor and potentially crack the solution reservoir.
- Inline system shows no pressure reading on the gauge. The check valve between pump and injector has stuck open or closed, a failure mode common after seasonal disuse. In Katy’s climate, humidity corrosion accelerates this.
BeforeAfterReplacement Cost & What’s Included
For Katy homeowners, Nikro vent sanitizing component replacement runs $340-$620 installed, with most single-component jobs, pump, nozzle, or hose assembly, landing in the $380-$480 range. Full inline system replacement with new mounting hardware and pressure testing starts at $580.
| Component | Parts + Labor Range | Warranty |
|---|---|---|
| Pump assembly (portable) | $340-$420 | 2 years |
| Nozzle / injector kit | $180-$260 | 2 years |
| Hose and filter set | $140-$200 | 1 year |
| Full inline system | $580-$620 | 3 years |
What drives the range: access difficulty, attic versus basement utility room; whether we need to cut and reseal ductwork to reach an inline injector; and whether your existing unit has the pre-2019 or post-2019 line fittings. Every price is written and agreed before work starts, Haven Standard Clause 1. The warranty covers the component and our installation labor, backed by the 365-Day Done Right Promise.
DIY or Call Us?
There’s a safe middle ground here. A homeowner can verify the model number, check the power connection, and confirm the solution reservoir isn’t empty. These three checks solve about 20% of what gets reported as “equipment failure.”
Where DIY goes wrong: the pump and injector operate under 60-80 PSI, enough to force sanitizing solution into skin or eyes if a line disconnects under pressure. The chemicals used, typically quaternary ammonium or hydrogen peroxide-based, require handling per the SDS sheet. And mis-threading a nozzle into galvanized ductwork can strip the fitting, turning a $200 repair into a $600 duct replacement. We carry pressure-testing equipment to verify no leaks before we leave.
CleanRun Air Duct Cleaning Katy is an independent service provider, not affiliated with Nikro. We also stock parts for Lennox, Trane, and Carrier sanitizing systems. Call (346) 666-7165 for a written estimate.
FAQs
In normal residential use, 4-6 years. Katy’s hard water and attic heat shorten that to 3-5 years if the unit isn’t flushed with distilled water after each use. We note the install date on your photo record so you can track it. Call (346) 666-7165 when output drops.
Sometimes, if the diaphragm is the only failed part and the housing isn’t cracked. Rebuild kits cost $80-$120 in parts but require precise torque on small fasteners; we’ve seen homeowners strip the threads and ruin the housing. We assess this on site and quote both options in writing.
Most single-component replacements take 90 minutes to 2 hours, including pressure testing and a documented photo of the installed part. Full inline system replacements run 3-4 hours if duct access is straightforward. We schedule a half-day window and usually finish early.
We carry pumps, nozzles, hose kits, and filters for SL200, SL400, and common inline series on every Katy-area truck. Less common components we can source within 24 hours through our Houston supplier. We confirm availability when you call so you’re not waiting on a part.
We also service Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman equipment, the full roster we use on jobs so customers can verify specifications independently.
The before photo does the talking. Everything after that is just paperwork. Tomas Reyes grew up in the Bronx, picked up his HVAC fundamentals at Bronx Community College, and has spent the better part of two decades running cleaning jobs across the Houston metro, including older ranch-style homes near LaCenterra at Cinco Ranch where the ductwork tells you more about a house’s history than the seller’s disclosure ever will. He built CleanRun around one habit: pulling the camera out before touching a single register, so the homeowner sees exactly what’s in there.
Ready for a written price before any work starts? Call (346) 666-7165. We’ll put our number next to any competitor’s written estimate, free. Every job includes a Documented Photo Record of every duct run, before and after, delivered as part of your standard job record. All technicians are background-checked, uniformed, and identified by name before arrival, Haven Standard Clause 3: Verified Crews.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Katy at CleanRun Air Duct Cleaning Katy, serving Katy and nearby areas.