Air Duct Cleaning in Houston — One Price Per System, Agreed Before We Start

Air Duct Cleaning in Houston, TX

Full residential air duct cleaning in Houston typically runs $350–$650 for homes under 2,500 square feet, with larger or more complex systems ranging up to $1,200. Houston’s Gulf Coast humidity and 9–10 month cooling season create contamination patterns — mold, flood residue, and heat-degraded duct connections — that standard dry-climate cleaning protocols miss entirely. Call us at (855) 683-5929 for a free estimate; we’ll scope your system in person and quote one flat price before any work begins.

Call (855) 683-5929

Lone Star Air Duct Cleaning Service Houston has served Houston since 2006. Owner Scott Gray leads every job personally, bringing two decades of hands-on experience and professional-grade Rotobrush and Nikro equipment to homes from the Ship Channel to the Energy Corridor. We don’t send crews — you get the most experienced technician in the company on your job, backed by 433 verified reviews averaging 4.9 stars.

Why Houston Homes Are Different

Houston’s combination of Gulf Coast humidity averaging 75–80% year-round and an AC season that stretches nine to ten months means duct systems here accumulate mold and microbial growth as a primary contaminant, not just dust. This fundamentally transforms duct cleaning into a moisture and mold remediation service — something technicians from Phoenix or Denver simply don’t encounter.

The 1970s–1990s suburban explosion built thousands of Houston homes with flex duct routed through unconditioned attics, where summer temperatures routinely exceed 140°F. That extreme heat degrades foil facing and mastic at connections, creating gaps that pull in fiberglass particles and moisture-laden outside air. Inner-loop neighborhoods like Montrose, the Heights, and Garden Oaks contain pre-1950s homes with galvanized sheet-metal trunk-and-branch systems — or non-standard layouts from window-unit conversions — requiring completely different scoping than cookie-cutter suburban systems.

Compounding these climate and housing factors, Hurricane Harvey’s 2017 inundation of roughly 154,000 structures left lasting post-flood contamination that standard cleaning protocols fail to address. Homes in the east Houston corridor — Galena Park, Pasadena, Channelview, Deer Park — sit downwind of the Ship Channel’s dense petrochemical refineries, and technicians working those ZIP codes consistently pull filters and duct interiors coated with a dark, oily industrial particulate residue unlike anything in the west or northwest suburbs.

Air Duct Cleaning in Houston

Air duct cleaning in Houston demands more than rotating a brush through a duct. Our humidity keeps evaporator coils and return plenums chronically wet, creating ideal conditions for mold and bacteria that colonize and spread downstream through the entire system. Post-flood homes — and there are tens of thousands in Harris County — may harbor silt and active mold colonies that look clean from the outside but release spore counts ten times baseline when disturbed. We video inspect before quoting and after cleaning on every job, so you see exactly what we’re dealing with and exactly what we removed. Air Duct Cleaning is our core service, and we’ve refined our Houston protocol through two decades of fieldwork.

Residential Duct Cleaning

Houston’s single-family homes present two distinct challenges depending on era and location. The suburban explosion built thousands of homes with flex duct through unconditioned attics — we’ve cleaned systems in Katy, Sugar Land, and Clear Lake where the foil facing had degraded so severely the duct was essentially open to the attic. In older neighborhoods like Montrose, the Heights, and Garden Oaks, we encounter galvanized sheet-metal trunk lines from pre-1950s construction or non-standard retrofits from window-unit conversions. Our residential cleaning scopes differently for each: rotary brush and HEPA extraction for standard flex systems, modified hand tools and careful camera navigation for fragile metalwork. Full residential duct cleaning in Houston typically runs $350–$650 for homes under 2,500 square feet with standard flex-duct systems and 8–15 registers.

Commercial Duct Cleaning

Houston’s commercial buildings — medical offices near the Texas Medical Center, retail along Westheimer, warehouses near the Port — face amplified contamination loads from longer operating hours and larger occupant counts. We clean commercial systems after hours to minimize disruption, using Nikro portable HEPA systems that contain debris without shutting down your HVAC. For restaurants and food-service operations in areas like Chinatown or the East End, grease and moisture combine in return ducts to create thick, hazardous buildup that requires specialized degreasing pretreatment before mechanical cleaning. Scott Gray scopes every commercial job personally; larger homes, commercial buildings, or systems requiring extensive sanitizing range $650–$1,200.

Post-Flood & Deep Contamination Cleaning

Hurricane Harvey inundated roughly 154,000 structures in Harris County, and subsequent tropical storms have added to the total. Floodwater enters duct systems through return grilles, disconnected attic connections, and even small leaks, depositing silt in low points and mold throughout. We’ve opened flex ducts in Houston homes that looked clean externally but contained packed mud and active mold colonies inside. Standard cleaning protocols from drier markets miss this entirely — our post-flood protocol adds antimicrobial treatment, extended HEPA cycles, and verification documentation. Post-flood or deep contamination with sanitizing runs $750–$1,200.

How soon after a flood should I have ducts cleaned in Houston?

Schedule duct inspection within 48–72 hours of water receding, but do not run your HVAC until a technician confirms the system is dry and uncontaminated. Running a flooded system drives mold spores and silt through every room and can destroy your blower motor and evaporator coil. Call (855) 683-5929 — we’ll prioritize post-flood calls and inspect before quoting.

Why do my ducts smell like chemicals near the Ship Channel?

The odor comes from petrochemical particulate deposited by refinery emissions that enter your home’s ventilation intake and accumulate in duct interiors — standard dust removal won’t eliminate it because the residue bonds to duct surfaces and continues off-gassing. We encounter this regularly in Galena Park, Pasadena, Channelview, and Deer Park, and our protocol adds extended HEPA vacuuming cycles with Nikro equipment plus duct sealing to prevent recontamination. Call (855) 683-5929 for a camera inspection and exact quote.

Dryer Vent Cleaning in Houston

Dryer vent cleaning in Houston typically costs $150–$225 for standard residential jobs, with severe compaction or mechanical clearing running $200–$325. Houston’s Gulf Coast humidity transforms lint into a dense, cement-like blockage that standard brushes often can’t penetrate — unlike in drier climates where lint stays fluffy. Combined with attic temperatures exceeding 140°F that bake moisture-lint mixtures into place, and storm-damaged caps from hurricane-force winds, Houston dryer vents require specialized equipment and inspection protocols we’ve developed over two decades. Dryer Vent Cleaning protects your home from fire hazard and restores drying efficiency.

Vent Inspection & Assessment

Every Houston inspection starts with airflow measurement and a camera-run assessment of the full vent path. We’re looking for what generic cleaners miss: moisture-hardened lint compaction in long attic runs, storm-damaged caps on homes near Clear Lake or Galveston Bay, and post-Harvey mold colonies in low-lying neighborhoods like Braeswood or near Brays Bayou. Our Rotobrush inspection cameras reveal crushed flex sections and disconnected joints that Houston’s extreme attic heat degrades faster than in cooler climates. A typical residential inspection in Houston runs $89–$149, waived if you proceed with cleaning.

Lint Removal & Mechanical Clearing

In Houston, lint removal isn’t a quick vacuum job. The combination of 75–80% year-round humidity and frequent rainfall means dryer vents trap moisture-laden lint that compacts into a dense, cement-like block — especially in homes with long, winding flex duct runs through unconditioned attics where summer attic temps exceed 140°F. We use Rotobrush rotary agitation to break through these blocks, followed by Nikro HEPA vacuum extraction that contains the debris without redistributing it through your home. Standard vent cleaning and lint removal runs $150–$225; severe compaction or mechanical clearing runs $200–$325.

Vent Rerouting & Cap Replacement

Houston’s housing boom left thousands of homes with poorly designed vent paths: 25-foot flex runs with multiple 90-degree bends, ducts routed through flooded crawlspaces, or terminations in enclosed soffits that trap humid air. We reroute to code-compliant smooth-wall aluminum with direct exterior termination, often shortening the run and improving airflow by 40% or more. Standard flapper caps fail fast here — we install wind-rated, pest-proof caps with integrated bird guards essential for Houston’s storm exposure and year-round pest pressure. Vent rerouting runs $275–$450; vent cap replacement with bird guard runs $125–$195.

How does Houston’s humidity affect my dryer vent differently than in drier climates?

Houston’s 75–80% average humidity means lint absorbs moisture and hardens into a dense, cement-like blockage that standard brushes often can’t penetrate — unlike in drier climates where lint stays fluffy and easier to remove. This compaction is worst in long attic runs where summer temperatures exceed 140°F, baking the moisture-lint mixture into place. We use Rotobrush rotary agitation specifically designed to break through these hardened blocks. Call (855) 683-5929 if your dryer’s taking longer than one cycle.

Do I need a special dryer vent cap for hurricane season?

Yes — standard flapper caps fail under Houston’s storm conditions, allowing wind-driven rain to enter and create lint-plugging moisture blocks. We install wind-rated caps with integrated bird guards that seal against water intrusion while maintaining proper airflow; these are essential for homes in storm-exposed areas like Clear Lake, Pasadena, and anywhere near Galveston Bay. Cap replacement with proper weatherproofing runs $125–$195. Call (855) 683-5929 before June storm season to check your current cap.

HVAC Cleaning in Houston

HVAC cleaning in Houston typically runs $275–$650 for a full system service and is usually completed in a single visit. Most Houston homes need deeper cleaning than standard duct-only services because our Gulf Coast climate creates contamination patterns that dry-climate crews simply don’t encounter — chronically wet evaporator coils, mold colonization downstream, and heat-degraded connections pulling attic air into the system. HVAC Cleaning from Lone Star Air Duct Cleaning Service Houston addresses the full air path, not just the visible vents.

Evaporator Coil & Air Handler Cleaning

Houston’s persistent humidity keeps evaporator coils chronically wet through our 9–10 month cooling season. That moisture breeds mold and bacteria that standard coil sprays won’t touch. We remove the coil assembly when accessible, clean with foaming agents that break down biological buildup, and apply antimicrobial treatments specifically formulated for Houston’s high-humidity environment — designed to resist wash-off from the heavy condensate production our coils generate. The air handler is where Houston’s two climate enemies converge: extreme attic heat and Gulf moisture. We clean the blower assembly, housing, and return plenum, then seal connection points with fresh mastic. Evaporator coil cleaning runs $180–$340; full air handler cleaning runs $275–$450.

Blower & Condenser Cleaning

A dirty blower wheel in Houston doesn’t just move less air — it becomes a distribution point for whatever’s growing upstream. We remove and clean blower assemblies with compressed air and contact cleaners, balance the wheel, and inspect motor bearings for moisture damage common in our high-humidity installations. Outdoor condensers battle salt air from the Gulf that accelerates coil corrosion in homes south of I-10 and east of 288, plus cottonwood fluff and pollen from our extended growing season. Blower cleaning runs $150–$280; condenser cleaning runs $120–$220.

Complete System Cleaning

For homes with established contamination or post-flood history, we recommend complete HVAC system cleaning that coordinates all components — coils, blower, condenser, air handler, and full duct network — into one scope. This prevents the feedback loops we see in Houston where mold in one component recolonizes the rest within months. Complete HVAC system cleaning runs $475–$850, with coil treatment and antimicrobial application adding $85–$150 when needed.

Why does Houston’s humidity make HVAC cleaning more urgent than in drier cities?

Houston’s 75–80% year-round humidity and 9–10 month cooling season make mold and microbial growth the primary contaminant, not just dust. That transforms HVAC cleaning here into a moisture and mold remediation service rather than simple debris removal. Call (855) 683-5929 for a free assessment of your system’s biological loading.

Can standard HVAC cleaning fix post-flood contamination from Harvey or other storms?

Standard cleaning protocols typically cannot fully address post-flood contamination where ducts held standing water. Specialized remediation — including antimicrobial treatment, potential duct replacement in severely affected sections, and verification testing — is required for the roughly 154,000 structures inundated in 2017. We scope these jobs individually and won’t charge for cleaning when replacement is the honest answer. Call (855) 683-5929 to discuss your home’s specific situation.

Duct Repair & Sealing in Houston

Duct repair and sealing in Houston typically costs $180–$650 depending on the system type, with flex duct repairs running $200–$400 per run and metal duct sealing at $300–$650 for whole-system work. Houston’s 9–10 month cooling season forces AC systems to run harder and longer than almost anywhere in the country, and every leak pulls 140°F attic air into the system, wasting 20–30% of cooling capacity before it ever reaches the vents. Duct Repair & Sealing cuts energy bills and stops contamination at the entry points.

Duct Sealing & Mastic Application

We seal supply and return plenums, trunk lines, and branch connections using mastic sealant rated for Gulf Coast humidity — not the cheap foil tape that fails in one Houston summer. Mastic is the only sealant we trust for Houston’s conditions: brush-applied, it fills gaps up to 1/8 inch, remains flexible through thermal cycling, and won’t degrade under UV exposure in attic environments. In flood-prone areas where ducts have carried standing water after past storms, mastic sealing is often the critical step that prevents recontamination. Whole-system mastic sealing runs $450–$650; partial metal duct seam sealing runs $300–$500.

Flex Duct Repair

The 1970s–1990s suburban explosion across Houston’s outer rings installed millions of feet of flex duct through unconditioned attics. That foil facing and internal insulation degrade fast when attic temperatures spike past 140°F for months straight. We replace crushed, kinked, or heat-damaged flex runs with properly sized new material, support it with straps every 4–5 feet per code, and seal connections with mastic. Single flex duct run repair or replacement runs $200–$400.

Metal Duct Repair & Custom Fabrication

Pre-1950s homes in the Heights, Montrose, and Eastwood neighborhoods still run galvanized sheet-metal trunk-and-branch systems that flex-duct replacements can’t simply match. Rusted seams, failed snap-lock connections, and custom transitions require sheet-metal fabrication skills most duct cleaners never developed. We repair or replace damaged sections, fabricate transitions where original parts no longer exist, and seal with mastic rated for metal expansion and contraction. Custom metal transition fabrication runs $250–$450 per piece; duct insulation replacement runs $150–$300 per run.

My ducts smell like chemicals after the refinery haze settles — can sealing stop that?

Sealing helps, but it’s only part of the solution for homes downwind of the Ship Channel in Galena Park, Pasadena, Channelview, and Deer Park. We first inspect with a camera to see if that dark, oily particulate has coated the duct interior — cleaning removes the residue, then sealing the supply plenum and return connections prevents re-introduction of contaminated attic air. Call (855) 683-5929 and we’ll scope it; estimates are free.

After Hurricane Harvey, should I replace or just seal my flex ducts?

Replace them if they carried standing water; seal them if they only experienced elevated humidity. Flood water inside flex duct saturates the internal fiberglass liner, and no amount of sealing prevents mold spores from that reservoir re-entering airflow. We scope with cameras to distinguish surface moisture from internal saturation — a $200 inspection that saves you from sealing ducts that need replacement. Call (855) 683-5929 for a camera inspection.

Air Quality & Sanitizing in Houston

Air quality sanitizing in Houston typically costs $350–$850 for whole-home treatment and is usually completed in a single visit. Most Houston homeowners need sanitizing every 2–3 years due to our relentless humidity and extended cooling season — mold and bacteria colonization here is the standard expectation, not an optional upsell as it might be in drier Sun Belt cities. Air Quality & Sanitizing from Lone Star Air Duct Cleaning Service Houston targets the microbial growth that mechanical cleaning alone cannot eliminate.

Mold & Bacteria Treatment

Houston’s prolonged AC season combined with year-round relative humidity of 75–80% makes mold accumulation the primary contaminant in our duct systems. We apply EPA-registered antimicrobial treatments from Abatement Technologies directly to contaminated duct surfaces, including evaporator coils and return plenums where Houston’s humidity keeps conditions chronically wet. Bacterial colonization often follows the same moisture pathways, and our sanitizing process targets both visible microbial growth and the biofilm layers that standard brushing can leave behind. Bacteria sanitizing for whole-home treatment runs $350–$600; mold treatment runs $450–$850.

Odor Removal

Houston homeowners call us about three distinct odor categories: musty/moldy, chemical/petrochemical, and stale/filter-related. The musty smell that intensifies when your AC kicks on usually signals active microbial growth on the coil or in the first few feet of return duct. Chemical odors are a different problem entirely — homes in the east Houston corridor sit downwind of the Ship Channel’s dense petrochemical concentration, and prevailing winds deposit an industrial particulate that coats filters and duct interiors with a dark, oily film standard antimicrobial treatments don’t dissolve. Odor removal treatment runs $400–$750.

UV Light Installation

UV-C light installations target the root cause of Houston’s recurring mold problems: the evaporator coil surface that stays wet through our 9–10 month cooling season. By maintaining a sterile coil environment, UV lights prevent the colonization that otherwise spreads downstream through the entire duct system. We size and position UV lamps for Houston’s extended runtime demands — a light adequate for a northern climate’s 4-month season won’t survive our workload. Most Houston installations use dual-lamp configurations treating both the coil and the return plenum. Professional UV light installation runs $650–$1,200.

Why does my Houston home still smell musty after a standard duct cleaning?

Because standard brushing and vacuuming don’t kill mold or bacteria — they just remove loose debris. In Houston’s humidity, microbial growth adheres to duct surfaces and releases spores when disturbed; without EPA-registered antimicrobial application, the smell returns within days. We see this constantly in homes near Braes Bayou and other flood-prone areas where moisture has penetrated deeper than mechanical cleaning reaches. Call (855) 683-5929 and we’ll assess whether your system needs sanitizing.

Can UV lights really help with my duct mold problem?

Yes — but they work preventively at the source, not curatively throughout the duct network. UV-C light installed at the evaporator coil maintains a sterile surface, preventing the mold and bacteria growth that otherwise spreads downstream. In Houston’s climate, this matters enormously because our coils stay wet so many months per year. We’ve installed Honeywell and Aprilaire UV systems for hundreds of Houston homeowners, particularly after mold remediation, to prevent recurrence.

Brands We Service in Houston

We stock parts and service components from Honeywell, Aprilaire, and Guardsman for fast turnaround on filtration upgrades, UV installations, and air quality accessories. Our equipment roster includes Rotobrush rotary brush systems, Nikro HEPA vacuums, and Abatement Technologies sanitizing systems — the same tools used in commercial and remediation-grade jobs. our brands page has full details on compatible systems and upgrade paths for Houston homes.

Pricing for Air Duct Cleaning in Houston, TX

Neighborhoods We Serve in Houston

We work across Houston from the Ship Channel to the Energy Corridor, with most neighborhoods reachable within 45 minutes during standard scheduling. Our team routinely reaches Montrose, the Heights, Memorial, and Bellaire with professional-grade equipment and owner-led service on every job.

• Montrose & the Heights — pre-1950s metal duct systems and renovation-buried lines
• Memorial & Energy Corridor — 1970s–1990s flex-duct homes with attic heat degradation
• Sugar Land, Katy & Clear Lake — suburban flex systems with post-flood contamination risk
• East End, Chinatown & Eastwood — commercial kitchens and industrial exposure zones
• Galena Park, Pasadena & Channelview — petrochemical particulate and refinery downwind areas

Service Area — Cities Near Houston

Our service area extends throughout the Houston metro and surrounding communities. We regularly work in Bellaire, TX, West University Place, TX, Aldine, TX, Jacinto City, TX, and Galena Park, TX, with Houston, TX as our primary base. Scott Gray has cleaned duct systems in each of these communities and understands the local housing stock and contamination patterns specific to each area.

FAQs About Air Duct Cleaning in Houston