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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AfterTrusted Air Quality & Sanitizing for Katy Homeowners
Air Quality & Sanitizing - Katy typically addresses mold, bacteria, allergens, and persistent odors inside your HVAC system, with most whole-home treatments running $400-$1,200 depending on scope and whether UV or filtration hardware is installed. CleanRun Air Duct Cleaning Katy has documented the inside of over 52,000 homes since 2013, and in Katy specifically, we regularly find elevated microbial activity in plenum boxes (the main distribution chamber above your air handler) during the humid months from April through October. Call (346) 666-7165 for a written price before any work starts - Haven Standard Clause 1.
Katy’s location on the coastal prairie puts homeowners in a unique spot: afternoon humidity regularly climbs past 75% from late spring through early fall, and the clay-heavy soils common in subdivisions like Cinco Ranch and Seven Meadows hold moisture against slab foundations. That moisture migrates upward through wall cavities and into ductwork, especially in homes built between 2015 and 2020 where tighter envelopes reduce natural air exchange. We’ve photographed active mold growth on fiberglass duct liner in homes as new as four years old in the Grand Lakes and Pine Mill Ranch areas. The issue isn’t age - it’s whether your system has been properly assessed and treated with documented methods.
Every CleanRun job starts with a written price delivered before any panel comes off your system, and ends with a Documented Photo Record of every duct run, included as standard. Our 365-Day Done Right Promise applies to air quality work just as it does to duct cleaning: if the treatment doesn’t perform as scoped, we make it right in writing, not subject to manager discretion. Background-checked, uniformed technicians arrive identified by name, operating under Haven Standard Clause 3: Verified Crews.
What Our Air Quality & Sanitizing Service Includes
Mold Treatment
Mold treatment targets active fungal growth inside ductwork, on coils, and within the plenum - the large sheet-metal box that distributes conditioned air to each duct run (the individual pathways to your rooms). In Katy, we most commonly find Cladosporium and Aspergillus species on fiberglass liner in homes near the Energy Corridor, where HVAC systems run hard nine months of the year and condensation accumulates on cooler surfaces. CleanRun applies EPA-registered antimicrobial agents through controlled fogging or direct application, then verifies treatment with post-service photography showing the same locations captured before work began. We do not quote mold treatment without first inspecting the system - the extent of growth, accessibility of affected duct runs, and whether the underlying moisture source has been resolved all determine whether treatment is appropriate or if duct replacement is the more honest recommendation.
Bacteria Sanitizing
Bacteria sanitizing addresses microbial contamination that doesn’t present visible mold but produces musty odors, triggers respiratory irritation, or shows elevated counts on environmental sampling. This is distinct from routine duct cleaning - negative-pressure extraction (using suction to pull debris from the duct while containing it) removes particulate matter, but sanitizing applies an antimicrobial agent rated for HVAC systems to reduce bacterial load on surfaces the vacuum cannot fully contact. We recommend this service in Katy homes where occupants have experienced recurring sinus infections, where pets have had accidents in return air pathways, or where systems have sat idle during extended vacancies in subdivisions like Firethorne or Cross Creek Ranch. CleanRun uses application equipment from Nikro and Abatement Technologies, with agents selected for compatibility with your specific duct materials - flex duct, fiberglass board, or galvanized steel each respond differently to chemical treatment.
Odor Removal
Odor removal targets persistent smells that survive standard cleaning: tobacco residue, pet urine that has crystallized in porous duct liner, smoke from kitchen fires, or the “dirty sock” smell produced by bacterial growth on evaporator coils. The process begins with source identification - our technicians use borescope cameras (flexible inspection cameras fed into the duct) to locate the origin rather than masking symptoms with deodorizers. In Katy, we’ve traced stubborn odors to dead rodents in inaccessible wall cavities, to condensate pans that have been draining improperly for years in homes near Mason Road, and to filter bypass where unfiltered air has been pulling through gaps around poorly seated media filters. Treatment may involve thermal fogging, oxidation with hydrogen peroxide-based agents, or in severe cases, physical removal and replacement of contaminated duct sections - always with a written price before any destructive work begins.
UV Light Installation
UV light installation places germicidal ultraviolet lamps inside your air handler or ductwork to inhibit microbial growth on coils and in the airstream. The technology is straightforward: UV-C wavelengths at 254 nanometers damage the DNA of mold, bacteria, and viruses, preventing reproduction. What matters in Katy is proper sizing and placement - a 9-watt stick light jammed upstream of a wet coil in a 5-ton system is insufficient, and lamps installed without access for annual replacement become expensive decorations within 12-14 months when the bulb degrades. CleanRun specifies UV systems from Honeywell and Guardsman, sized to your system’s airflow and installed with service access per manufacturer guidelines. We document lamp output at installation with a UV meter and include replacement scheduling in your job record, because a UV light you cannot maintain is not a solution.
Air Purifier Install
Air purifier installation for whole-home treatment means placing a media or electronic filtration device in your return air pathway, treating all air that circulates through the HVAC system rather than cleaning single rooms. The critical specification is pressure drop - restrictive filters can starve your blower motor and freeze coils, especially in Katy’s long cooling season where systems run 2,000+ hours annually. CleanRun installs Honeywell and Aprilaire whole-house purifiers matched to your system’s rated airflow, with MERV ratings (a scale measuring filtration efficiency) selected for your equipment’s capabilities and your specific concerns. For homes in Katy with allergy sufferers, we may recommend a 4-inch media cabinet with MERV 13 filtration; for homes with recent construction dust or wildfire smoke intrusion, electronic air cleaners with washable cells reduce ongoing media costs. Every recommendation includes the written pressure-drop calculation and the price before installation begins.
Allergen Reduction
Allergen reduction combines mechanical filtration, source removal, and surface treatment to lower concentrations of pollen, dust mite debris, pet dander, and cockroach allergen in your HVAC system and the air it distributes. Katy presents a specific challenge: the area’s heavy tree pollen seasons in late winter and early spring, combined with Bermuda grass and ragweed through fall, load outdoor coils and infiltrate homes through intake vents and building envelope gaps. CleanRun’s allergen protocol includes negative-pressure extraction of duct runs, coil and blower cabinet cleaning, filter upgrade recommendations, and optional sealant application to duct joints that are pulling attic air - a common finding in homes built during the 2015-2020 construction boom where speed sometimes outpaced sealing detail in neighborhoods like Cane Island and Tamarron. Post-service, your photo record shows the before condition of each component and the after result.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Air Quality & Sanitizing
CleanRun technicians work with professional-grade equipment from trade-recognized manufacturers, and we name our tools because you can verify their specifications independently. We’ve installed and serviced hundreds of Honeywell whole-house air purifiers and UV systems across Katy and the surrounding communities - their F100 and F300 media air cleaners are common in homes built by Perry, Taylor Morrison, and Lennar in the 2015-2020 period, and we stock replacement cells and media in standard sizes to complete service in a single visit. Our Rotobrush agitation and vacuum equipment handles the mechanical cleaning that precedes any sanitizing treatment, with brush sizes matched to duct diameter to avoid damaging flex duct or dislodging fiberglass liner.
We also specify Guardsman UV systems for applications requiring higher output or specialized mounting configurations, and Nikro equipment for negative-pressure extraction and antimicrobial application in commercial-grade or heavily contaminated residential systems. Whether you have Honeywell, Aprilaire, Guardsman, or any other make of air quality equipment - or none at all and want an honest assessment of whether any is appropriate - we can inspect your system, show you what the camera sees, and deliver a written price for any work we recommend.
BeforeAfterSigns You Need Air Quality & Sanitizing Right Now
- Musty or sour odors when the system cycles on. This indicates active microbial growth on coils, in the plenum, or in duct runs with accumulated moisture. In Katy’s climate, we’ve found that odors appearing in April typically worsen through October if the underlying moisture issue isn’t addressed - the smell is not “just how the house is.”
- Visible mold or staining around supply registers. Black, green, or gray discoloration on ceiling or wall registers suggests growth inside the duct run or at the boot connection, often where cold air meets humid attic air at an unsealed joint. This is beyond cosmetic - spores are being distributed into occupied space every time the blower runs.
- Increased allergy or asthma symptoms indoors, especially at night. If symptoms improve when you leave the house and return within an hour of the system cycling, your HVAC is likely circulating concentrated allergen or microbial particulate. We’ve documented this pattern in Katy homes near the Grand Parkway construction zones where airborne dust loads have been elevated for years.
- Recent water intrusion or leak, even if “cleaned up.” Ductwork in contact with wet insulation, or systems that continued operating during a leak event, often harbor hidden growth that surface drying doesn’t reach. The paper facing on duct board is particularly susceptible - it wicks moisture and supports mold before visible staining appears on the exterior.
- System has never had air quality treatment, and the home is 5+ years old. In Katy’s climate, five years of cooling-season operation without coil treatment or duct inspection is sufficient for significant microbial establishment, especially in homes with standard 1-inch filters that bypass fine particulate. The absence of symptoms doesn’t mean absence of contamination - it means your tolerance hasn’t been exceeded yet.
Our Air Quality & Sanitizing Process - Step by Step
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System inspection with borescope photography. We feed a lighted camera into accessible duct runs, photograph the plenum interior, and inspect the evaporator coil and condensate pan through access panels. You see what we see before any price is discussed - Haven Standard Clause 2: Informed Consent.
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Written scope and price delivered before work begins. Based on findings, we specify the treatment protocol, equipment required, and total price. One flat price per system, no per-vent add-ons, no “while we’re here” escalation. The price is valid for 30 days; you can accept on site or call back when ready.
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Mechanical cleaning and preparation. For systems requiring it, we perform negative-pressure extraction of debris using Rotobrush agitation and Nikro vacuum collection. This step removes the organic load that would otherwise shield microbes from sanitizing agents - applying chemicals to dusty surfaces wastes product and produces inferior results.
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Targeted sanitizing treatment or hardware installation. We apply EPA-registered antimicrobial agents, install specified UV or filtration equipment, or execute odor removal protocols per the written scope. Application methods vary: direct spray for accessible surfaces, fogging for complete duct run coverage, or controlled oxidation for severe odor cases. Every product is documented in your job record with EPA registration number.
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Post-service verification photography and documentation. We photograph treated areas and installed equipment, test UV output with a calibrated meter where applicable, and deliver your complete job record: before photos, after photos, product specifications, the written scope, and the 365-Day Done Right Promise. This is not a receipt - it is evidence of what was done, where, and with what.
How Much Does Air Quality & Sanitizing Cost in Katy?
A typical bacteria sanitizing or odor removal treatment for a single HVAC system in Katy runs $400-$650 for homes under 3,500 square feet, with the final price depending on system accessibility, the number of duct runs requiring direct treatment, and whether mechanical cleaning is needed before sanitizing - see our Air Quality & Sanitizing pricing for more detail. Mold treatment ranges $600-$1,100 when growth is contained to accessible ductwork and the coil; cases requiring duct liner removal or replacement of contaminated flex duct sections fall outside this range and are quoted separately after inspection. UV light installation with a properly sized Honeywell or Guardsman system, including electrical connection and service access modification, typically runs $800-$1,200. Whole-house air purifier installation - a 4-inch or 5-inch media cabinet from Honeywell or Aprilaire - ranges $900-$1,400 depending on ductwork modification required and whether your blower can handle the additional static pressure without upgrade.
Several factors move prices within these ranges. Attic-mounted systems in Katy homes with limited access hatches require additional labor time - common in the patio homes and townhomes near LaCenterra and the newer dense developments along Franz Road. Systems with multiple return air pathways or zoned ductwork need treatment of each zone separately. And homes with recent construction or renovation may have excessive debris loads that require pre-cleaning before sanitizing is effective - we’ve found this repeatedly in the new-build sections of Cane Island and Elyson where drywall dust and fiberglass fragments accumulate during the first two years of occupancy.
To avoid overpaying, reject any quote that cannot explain what specific treatment is being applied, to which components, with what products, and what verification you’ll receive. The $79 “whole house sanitizing” coupon is not a price - it is a lead-generation fee that converts to a much larger invoice once the technician is in your home. CleanRun’s written price under Haven Standard Clause 1 includes all labor, materials, and documentation; the only additional cost is sales tax. We also offer a Free Second Opinion on any competitor’s written estimate - bring us their scope and price, and we’ll put ours next to it with no obligation.
Your free estimate includes the full borescope inspection and photography. Call (346) 666-7165 to schedule.
Air Quality & Sanitizing Near Katy - Our Service Area
CleanRun serves homeowners throughout Katy and the surrounding communities, with typical scheduling availability within 3-5 business days for non-urgent air quality assessments. Our service area includes Air Quality & Sanitizing in Cinco Ranch, where we’ve treated numerous homes in the golf course sections with chronic humidity issues; Air Quality & Sanitizing in Brookshire, with its mix of established ranch properties and new development; and extends to Mission Bend, Pecan Grove, Four Corners, Richmond, New Territory, Jersey Village, Rosenberg, Meadows Place, and Sugar Land. Response to home service requests is managed by live operators, not automated systems, and technicians are dispatched from our Katy-based operation.
Serving Katy, TX - Our Local Coverage Area
We’re based in the Katy area and know this community well, and we also provide Richmond Air Quality & Sanitizing. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Air Quality & Sanitizing in Katy
Our Air Quality & Sanitizing in Brookshire targets living contaminants - mold, bacteria, viruses, and the odors they produce - using EPA-registered antimicrobial agents or germicidal equipment, while regular duct cleaning removes non-living debris like dust and construction residue through mechanical extraction. Duct cleaning improves airflow and reduces particulate load; sanitizing addresses the microbial ecosystem that can establish in moist, dark ductwork, particularly in Katy’s humid climate. Many homes benefit from both, but they are distinct services with different protocols and pricing. Call (346) 666-7165 and we’ll inspect your system to determine what’s actually needed.
A typical whole-home sanitizing treatment takes 3-5 hours for a single system in a 2,000-3,500 square foot home, with UV or air purifier installations adding 1-2 hours for electrical work and testing. Mold treatments requiring direct application to multiple duct runs or coil removal take longer - 5-7 hours is common for moderate cases. We schedule with a time window, not a precise minute, because access conditions vary; you’ll receive a call when the technician is en route. The work is not rushed - Haven Standard Clause 4: Thorough Completion means we verify results, not just apply product and leave.
Most Katy homeowners pay $400-$650 for bacteria sanitizing or odor removal, $600-$1,100 for mold treatment of accessible ductwork, $800-$1,200 for UV installation, and $900-$1,400 for whole-house air purifier installation - all as single flat prices per system with no per-vent add-ons. The only way to receive an exact price for your home is through inspection, which we provide at no charge. Call (346) 666-7165 for a written estimate with no obligation to proceed.
Yes - we install and service Honeywell, Aprilaire, and Guardsman equipment regularly, and we stock common replacement components for faster completion. Our technicians carry specifications for these manufacturers’ current product lines and can advise whether your existing equipment is properly sized for your home’s airflow requirements. If you have another brand or are unsure what is installed, we’ll identify it during inspection and advise on serviceability. The brand name on the equipment matters less than whether it was correctly specified and installed for your specific system.
Air quality and sanitizing is a scheduled service, not an emergency dispatch - we do not claim same-day response because proper assessment and treatment cannot be rushed. That said, active mold growth affecting immunocompromised occupants, or systems producing strong odors that make the home uninhabitable, receive priority scheduling within 24-48 hours. For non-urgent concerns, our standard 3-5 day scheduling allows proper preparation and ensures the assigned technician has appropriate time allocated. All calls are answered live, and we’ll be direct about whether your situation warrants expedited scheduling.
Every job is backed by CleanRun’s 365-Day Done Right Promise: if the work does not perform as specified in your written scope, we return and make it right at no additional cost - documented in writing on every job, not a verbal assurance subject to reinterpretation. This applies to treatment efficacy, equipment function, and installation quality. UV lamp bulbs carry manufacturer warranties for defects; the labor to replace them is covered by our promise. We also provide the Free Second Opinion guarantee - if you’re not satisfied with our assessment, we’ll refund any inspection fee and you owe nothing for our time.
Ensure access to your indoor air handler, which is typically in the attic, garage, or a dedicated closet - remove stored items blocking panels or access doors. If you have pets, secure them away from work areas; some antimicrobial agents require brief ventilation periods after application. You do not need to leave the home during most treatments, though we recommend vacating for 2-4 hours after fogging applications if you have chemical sensitivities - we’ll advise based on the specific protocol for your job. Have your HVAC system’s maintenance history available if you have it, but this is not required. The technician will photograph everything before beginning and review the scope with you before any work starts.
Schedule Your Air Quality & Sanitizing Service in Katy Today
Call (346) 666-7165 to speak with a live operator and schedule your free inspection. You’ll receive a written price before any work begins, a Documented Photo Record of every treated area, and the 365-Day Done Right Promise in writing - the standard CleanRun protocol on every job since 2013. No coupons, no surprises, no per-vent arithmetic. Just evidence, a fair price, and accountability.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Katy since 2013.