Los Angeles air carries wildfire smoke, high pollen counts, and year-round particulate matter that accumulates inside your duct system. We remove it all — using NADCA-certified source removal with HEPA-filtered equipment rated for PM2.5 capture.
Air duct cleaning is the professional removal of dust, debris, mold spores, allergens, and wildfire smoke particles from the interior of your HVAC duct system using negative-pressure vacuums and rotating contact brushes. In Los Angeles, a standard residential cleaning costs From $249, depending on home size and contamination level. The process takes 3–5 hours and is performed per NADCA's ACR standard — meaning all contamination is physically extracted, not just blown around. Ducts should be cleaned every 2–3 years in the greater LA area given local wildfire smoke and high pollen levels.
Three environmental factors unique to the LA basin accelerate duct contamination beyond national averages.
Every major wildfire event — Eaton, Palisades, Thomas, Woolsey — pushes ultra-fine PM2.5 particles (0.3 microns or smaller) through every gap in your home's envelope. Standard HVAC filters (MERV 8–11) do not capture these particles; they pass straight through and deposit on duct walls, coil fins, and blower motor components. Over years, this layer of smoke residue re-circulates every time the system runs, continuously exposing your household to combustion byproducts.
Unlike cold-climate cities where plants stop pollinating in winter, Los Angeles has essentially no true pollen off-season. Eucalyptus trees (which line streets throughout Silver Lake, Los Feliz, and Griffith Park neighborhoods) pollinate January–March. Grasses peak April–June. Ragweed and other composites go August–October. Your HVAC system circulates this pollen continuously, and what doesn't get trapped by filters becomes embedded in duct wall fibers — particularly in older flex duct systems where the corrugated interior surface holds particles firmly.
LA attic temperatures regularly reach 140–160°F in summer. Most residential duct systems run through these attics, and extreme heat accelerates the breakdown of duct seals, causing air leakage at connections. Leaking ducts pull unconditioned attic air — loaded with fiberglass insulation fibers, rodent dander, and decades of accumulated debris — directly into your breathing air supply. In San Fernando Valley homes built between 1955 and 1985, duct leakage rates often exceed 30% of total system airflow, according to the California Energy Commission.
After inspecting thousands of duct systems across the San Fernando Valley, Hollywood, and greater Los Angeles, our NADCA-certified technicians consistently find the same categories of contamination — often in homes whose owners have no visible air quality symptoms yet.
In most homes that haven't been cleaned in 5+ years, we find ¼" to ½" of compacted dust on the floor of supply and return ducts. This consists of skin cells, soil tracked in from outside, construction debris from renovations, and textile fibers from carpets and upholstery. Every time your blower cycles on, turbulence dislodges particles from these deposits into your breathing air.
Following major fire events (Eaton and Palisades fires in early 2025, Woolsey in 2018), we find a distinct dark-gray coating on duct interiors throughout affected neighborhoods — including homes 30+ miles from the fire perimeter. This residue contains polycyclic aromatic hydrocarbons (PAHs), fine metallic particles from burned structures, and volatile organic compounds (VOCs) that off-gas long after the smoke itself dissipated.
Los Angeles's spring marine layer (May Gray / June Gloom) introduces high humidity into HVAC systems that condensate heavily during this season. Without adequate drain pan maintenance, standing water at the coil promotes mold growth on coil fins. Mold spores then distribute throughout the duct system. This is particularly common in hillside homes with older air handlers in closets or attic spaces with limited ventilation.
Roof rats (black rats) are endemic throughout Los Angeles, particularly in older neighborhoods with mature tree canopies — Silver Lake, Los Feliz, Echo Park, Hancock Park, and the Hollywood Hills. These rats commonly enter duct systems through gaps in attic duct connections, where they nest and leave fecal matter that carries Hantavirus and Salmonella. We find evidence of rodent activity in roughly 1 in 6 homes we inspect citywide.
LA's housing stock underwent intensive renovation in the 2010s–2020s. Remodels that don't properly seal off duct registers during drywall work push fiberglass insulation particles, drywall dust, and saw-cut wood particles directly into ducts. Fiberglass is particularly problematic — the fibers are inert but irritate airway mucosa and can trigger asthma-like symptoms in sensitive individuals.
Los Angeles has numerous companies advertising "$49 duct cleaning specials" that do not meet NADCA's ACR standard. Here's how the two approaches compare:
| Factor | NADCA-Certified (Us) | From $49 Special |
|---|---|---|
| Vacuum equipment | Truck-mounted or high-CFM portable HEPA unit (≥4,000 CFM) | Small shop-vac or residential vacuum |
| Contact cleaning | Rotary brushes + compressed air whips in every duct run | Air-only blow — debris redistributed, not removed |
| System coverage | All supply + return ducts, air handler, coil, blower | Typically only accessible registers |
| PM2.5 capture | HEPA filtration captures particles to 0.3 microns | Standard filter exhausts fine particles back into home |
| Before/after documentation | Video inspection report provided | Rarely provided |
| Time on site | 3–5 hours for a standard home | Often 60–90 minutes |
| Upsell pressure | Written itemized quote before work begins | Often escalates price 5–10x on site |
The LA Attorney General's office has issued warnings about fraudulent duct cleaning "bait and switch" operations — companies that advertise From $49 specials and then demand From $800,000 once inside the home. Always get a written, itemized quote before any work begins, and verify NADCA membership at nadca.com.
Every cleaning follows the NADCA ACR (Assessment, Cleaning and Restoration) standard — the same protocol required for commercial and healthcare facilities.
Before touching a tool, the technician runs a small inspection camera through your main supply and return trunk lines and documents what's present — dust layers, mold indicators, rodent evidence, smoke residue, or construction debris. You see exactly what's inside before we start, and you receive a copy of the video. This also establishes a baseline so you can compare at the next cleaning cycle and demonstrate cleaning effectiveness to your homeowner's insurance if needed after a fire event.
We connect our truck-mounted HEPA vacuum system (rated at 4,000–6,000 CFM) to the main return air plenum or a large duct access point. The system creates negative pressure throughout the entire duct network — meaning any particle dislodged during cleaning is pulled toward the vacuum and captured in HEPA filters rather than being blown into your living space. All registers are sealed with foam plugs before we begin to maintain pressure. This is the core distinction of NADCA-standard work.
With negative pressure maintained, technicians insert rotating nylon or stainless brush systems into every supply and return duct run, working from the register back toward the main trunk. The brushes physically scrub duct walls and dislodge embedded particulates, which are simultaneously captured by the negative pressure system. For duct runs over 25 feet (common in LA's larger Valley homes), we use air whip tools with multiple flexible tails that clean the full circumference of the duct. Each duct is worked from both ends when access allows.
The air handler is the heart of your system and also the most contamination-prone component. We clean the evaporator coil (which accumulates dust and mold due to constant condensation), the blower motor and wheel (where debris causes imbalance and reduces CFM output), and the drain pan (where standing water breeds mold and bacteria). Coil cleaning with an EPA-approved foaming coil cleaner removes bio-film buildup that standard vacuuming cannot reach. A clean coil can reduce energy consumption by 5–15% on its own.
After cleaning, we run the system and perform a final camera pass on accessible duct sections to verify cleanliness. You receive a written report documenting work performed, any areas of concern found (duct damage, disconnected runs, mold zones requiring further treatment), and recommendations for maintenance. We replace your filter with a new MERV-11 or MERV-13 filter appropriate for LA air quality conditions and recommend the correct replacement schedule for your system and neighborhood.
The January 2025 Eaton and Palisades fires blanketed the Los Angeles basin in some of the worst air quality ever recorded in Southern California — AQI readings above 400 (Hazardous) were measured across the San Fernando Valley, the Eastside, and as far south as Long Beach for multiple consecutive days. Even homeowners who evacuated returned to homes where the HVAC system had run during the fire period, drawing in enormous volumes of smoke-laden air.
What many homeowners don't realize is that simply replacing your HVAC filter after a fire event is not sufficient. Wildfire smoke particles — particularly the ultra-fine PM2.5 and sub-micron particles — pass through even MERV-16 filters and deposit on duct walls, coil fins, and blower components. These particles continue to off-gas volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs) into your indoor air for weeks to months after the fire event ends.
Los Angeles homeowners run air conditioning 5–7 months per year, and many homes in the Valley run it nearly year-round in the hottest microclimates (Reseda, Canoga Park, Chatsworth). With that level of HVAC usage, the energy cost of dirty ducts is substantial.
Many Los Angeles homes — particularly tract homes built in the 1950s–1980s across North Hollywood, Van Nuys, Reseda, and Canoga Park — have leakage rates of 20–35% measured at the air handler. This means up to a third of your expensive conditioned air leaks into the attic before reaching living spaces.
Aeroseal is an aerosol-based duct sealant injected into the pressurized duct system from the inside. Particles seek and seal gaps up to ⅝" — including cracks at metal-to-flex duct connections that cannot be reached with mastic from the outside. The California Public Utilities Commission has recognized Aeroseal as eligible for utility rebates through Southern California Edison and SoCalGas energy efficiency programs.
We recommend adding Aeroseal sealing any time duct leakage exceeds 15% of system capacity, measured with a Duct Blaster test. We perform this test as part of our premium cleaning package.
All prices below include labor, HEPA vacuum equipment, basic filter replacement, and written inspection report.
| Home Size / Type | What's Included | Starting Price |
|---|---|---|
| 1–2 bedroom home or condo Up to 8 supply + 2 return registers |
All ducts, air handler cleaning, filter replacement, written report | From $249 |
| 3 bedroom single-family home 10–14 registers typical |
Full duct system, coil inspection, blower cleaning, filter, report | From $329 |
| 4–5 bedroom home 15–22 registers, often dual zone |
Both zones, all duct runs, full air handler service, premium filter | From $399 |
| Post-wildfire deep clean Any size with smoke contamination |
HEPA cleaning + coil decontamination + smoke odor treatment | From $449 |
| Add: Duct Sealing (Aeroseal) Combined with cleaning for best value |
Aeroseal injection, Duct Blaster before/after test, SCE rebate paperwork | +From $599 |
Prices are starting rates. Final price depends on actual register count, contamination level, and access difficulty. You receive a written itemized quote before any work begins.
We serve all neighborhoods in the San Fernando Valley, Hollywood, and greater LA. Click your area for a neighborhood-specific page.
NADCA-certified cleaning starting at $249. Free written quote with no obligation. Same-day service available throughout Los Angeles.
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