Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Styles & brands we work with
See the difference
Before
After
Before
After
Before
AfterHow Much Does Air Quality & Sanitizing Cost in San Francisco?
Air quality and sanitizing in San Francisco typically costs between $350 and $850 for a standard single-family home, with most homeowners paying around $550 for a whole-system duct sanitizing treatment. Larger homes with multiple HVAC zones run $700 to $1,200, while whole-home air purification installations start at $900 and can reach $2,800 depending on the system. These are 2026 market rates for San Francisco, where older Victorians, Edwardians, and mid-century homes each present different ductwork and airflow challenges.
Key Takeaways:
- Standard air duct sanitizing in San Francisco runs $350-$850 for most homes
- UV air purification system installation: $900-$2,800
- Whole-home HEPA filtration: $1,200-$3,500 installed
- Cost drivers include square footage, number of HVAC zones, and duct accessibility
- Free estimates available by calling (951) 527-6259
Air Quality & Sanitizing Cost Breakdown (2026)
Here’s what we’re seeing across the San Francisco market as of 2026. These numbers reflect actual job quotes from the Richmond District to Bayview, from the Sunset out to Glen Park and Noe Valley.
| Service | Typical Range | What It Includes |
|---|---|---|
| Whole-home duct sanitizing (single zone) | $350 – $550 | Negative-pressure extraction, antimicrobial fogging of supply and return ducts, register wipe-down |
| Whole-home duct sanitizing (2-3 zones) | $550 – $850 | Above, plus multi-zone fogging, longer treatment time, access to upper-floor returns in multi-story homes |
| Duct sanitizing + dryer vent cleaning bundle | $450 – $700 | Complete air duct sanitizing plus lint trap bypass cleaning and dryer vent path clearing |
| UV air purification system (coil-mounted) | $900 – $1,500 | UV-C lamp installed at the evaporator coil, wiring, 1-year bulb replacement included |
| UV air purification system (duct-mounted, whole-home) | $1,400 – $2,800 | Higher-output UV-C unit mounted in the main supply plenum, covers all air passing through the system |
| Whole-home HEPA filtration add-on | $1,200 – $3,500 | HEPA bypass system or cabinet filter integration with existing HVAC, media replacement schedule |
| Odor treatment for smoke, pet, or mildew | $250 – $600 | Targeted fogging plus duct sanitizing; heavier smoke or mildew cases in damp neighborhoods like the Sunset may run higher |
What moves these numbers up or down in San Francisco specifically? Three things, mostly. First, home layout: a three-story Marina or Pacific Heights townhouse with a vertical duct run costs more than a single-level Excelsior bungalow because the technician has more linear feet of duct to treat and more registers to access. Second, duct age and condition: pre-1980 galvanized ductwork often has accumulated decades of dust, and in fog-belt neighborhoods like the Outer Sunset and Richmond, we regularly see higher humidity inside ducts that means sanitizing takes an extra pass. Third, your HVAC equipment: homes with heat pump systems or zoned mini-splits need different treatment methods than central forced-air, and that changes the job cost.
What Affects Air Quality & Sanitizing Pricing in San Francisco
- Square footage and duct length. A 900-square-foot condo in SoMa has far less ductwork than a 2,800-square-foot Presidio Heights single-family home. More linear feet of duct means more time, more sanitizing agent, and a higher invoice.
- Number of HVAC zones. Many San Francisco homes built after 1990 have two-zone systems, and larger properties sometimes run three. Each zone needs separate fogging and register treatment.
- Duct accessibility. In older homes, especially Victorians and Edwardians in the Mission, Haight, and Castro, return ducts are sometimes boxed into tight wall cavities. When a technician has to work around finished walls and limited access points, labor time increases.
- Fog-belt humidity. Homes in the Sunset, Richmond, and Lake Merced areas sit in San Francisco’s fog zone. Persistent dampness inside ducts can mean surface mildew that requires a longer dwell time for the antimicrobial agent to work properly.
- Existing duct condition. If the sanitizing reveals cracked ducts, loose connections, or missing seals, repair work is a separate line item. We’ll put any needed repair in writing as a separate quote before we touch it, so you never get surprised at the end.
- Add-on equipment. UV purification units from brands like Honeywell and Aprilaire vary by model and output capacity. Whole-home systems cost more than coil-mounted units because they treat more air and require more involved installation.
How to Save on Air Quality & Sanitizing
San Francisco pricing varies enough that you should always get a written quote before any work starts. We put our price in writing on every job before the first tool comes out, and that number doesn’t change at the end. No surprise invoices, no “we found something” upsells. If we find something that needs attention, we show you, explain it, and quote it separately.
Here’s what actually reduces your cost:
- Bundle duct cleaning with sanitizing. If your ducts haven’t been cleaned in years, combining a full negative-pressure extraction with the sanitizing treatment costs less than doing them six months apart. You also get better results, because the sanitizing agent reaches cleaner surfaces.
- Do the dryer vent at the same time. Adding a dryer vent cleaning to your air quality package runs $100 to $150 more in most San Francisco homes, which is cheaper than a standalone visit later.
- Check your filter situation before you call. If your system is running on a clogged filter, the first thing any technician should tell you is to replace it. Homes that stay on a reasonable filter schedule (every 60 to 90 days in San Francisco, more often during wildfire season) typically need less intensive sanitizing treatments.
- Ask about maintenance plans. Some companies, including us at Linden Air Duct San Francisco, offer ongoing maintenance that keeps your system cleaner between sanitizing visits, which reduces what each individual treatment costs over time.
- Get the free estimate. Call (951) 527-6259 and we’ll walk you through your specific setup, square footage, and duct configuration and give you a real dollar range in a few minutes. No pressure, no obligation.
Why San Francisco Homes Need Special Attention
San Francisco’s housing stock is unusual. Over 40% of San Francisco homes were built before 1940, according to city housing data, and a large share of those are wood-framed Victorians and Edwardians with retrofitted forced-air systems. That means ducts that were originally sized for gravity heating or added decades after the house was built. These systems often run through uninsulated crawl spaces and attics that pick up dust, moisture, and whatever the fog brings in.
We also deal with what wildfire season now means for indoor air in San Francisco. When smoke from fires in the North Bay or East Bay drifts over the city, it settles into homes through windows, doors, and HVAC intakes. Homeowners in the Sunset, Richmond, and Ingleside notice it most because those neighborhoods get direct ocean-to-hills airflow. A thorough sanitizing treatment after a bad smoke season removes the fine particulate film that clings to duct surfaces and recirculates through the house for months afterward.
Our air quality and sanitizing service in San Francisco starts with a direct inspection of your system. We use negative-pressure extraction, which means the equipment creates vacuum inside the duct so debris and contaminants are pulled out rather than pushed around the house. After the ducts are clean, we apply an antimicrobial fogging treatment through the supply and return system. The fog reaches the interior duct surfaces, where bacteria, mold spores, and odor-causing buildup live. For homes that need it, we can then install ongoing purification from Honeywell, Aprilaire, Abatement Technologies, or Guardsman to keep the air clean between visits.
The whole process takes a half day for a typical San Francisco single-family home. Larger multi-story homes with multiple zones take longer. You won’t lose use of your system while we work, though you should plan to step out or move to another part of the house during the fogging phase.
Who Comes to Your Door Matters in San Francisco
We know that letting a technician into your home is a real decision. That’s especially true in San Francisco, where door-to-door scams and unverified service providers have made homeowners cautious. Linden Air Duct San Francisco operates to the Threshold Standard, which means every technician is background-checked and identity-verified before they ever knock on your door. Their name and photo are sent to you before the visit, and a photo ID badge is shown at the door, every time. This is the same standard our Threshold Group family has operated under since 2004, and it applies to every single service call.
Led by Marcus Veale, our San Francisco team works with professional-grade equipment from Rotobrush and Nikro. We don’t rent equipment from a supply yard for a weekend. These are the machines we use every day for air duct cleaning, dryer vent cleaning, and air duct repair across the city.
If something isn’t right after your sanitizing treatment, we make it right under our 365-Day Done Right Promise. That means if you find an issue with our sanitizing or cleaning work within 365 days, we return and address it. For repairs, every job carries a written guarantee, and if a covered repair fails, the second visit is free. These are standing commitments, in writing, on every job. That’s the accountability we think San Francisco homeowners deserve.
Air Quality & Sanitizing vs. Basic Duct Cleaning: What’s the Difference?
A basic air duct cleaning removes built-up dust and debris from the duct interiors. That’s a mechanical process. Air quality and sanitizing goes further. After cleaning, we apply an EPA-registered antimicrobial agent that kills surface bacteria, mold spores, and other biological contaminants inside the duct system. It’s the difference between vacuuming your floors and disinfecting them.
For San Francisco homes, we typically recommend sanitizing when:
- Someone in the house has persistent allergies or respiratory sensitivity, and you notice symptoms are worse at home
- You’ve had water intrusion or visible mildew around registers, more common in fog-zone neighborhoods and below-grade units
- You smell a stale or musty odor when the heat or AC first kicks on
- You’ve had pets in the home for years and notice dander buildup around vents
- You just bought the home and don’t know the last time the ducts were touched
- Wildfire smoke or nearby construction has coated the system in fine particulates
In some of these cases, the sanitizing treatment alone is enough. In others, we’ll recommend pairing it with full duct cleaning to get the best result. We’ll always tell you what we’d do in our own San Francisco home, and then put the exact price in writing before any work starts.
Frequently Asked Questions: Air Quality & Sanitizing Cost in San Francisco
How much does air quality and sanitizing cost in San Francisco?
For a standard single-family home in San Francisco, air quality and sanitizing typically costs $350 to $850. The median job runs about $550. Larger homes with multiple HVAC zones or older duct systems run $700 to $1,200. Call (951) 527-6259 for a specific quote on your home; estimates are free and we’ll give you a written number before any work begins.
Is air duct sanitizing worth the cost?
If anyone in your San Francisco home has allergies, asthma, or respiratory sensitivity, or if you have older ducts with visible dust and mildew odor, sanitizing typically pays for itself in reduced symptoms and better indoor air. A $350 to $550 treatment every one to two years is less expensive than ongoing allergy medication for many families, and it addresses the source of the problem rather than the symptoms. Our 365-Day Done Right Promise means if the work isn’t right, we return at no charge.
How long does air quality and sanitizing take?
A standard single-family home in San Francisco takes three to five hours for complete air quality and sanitizing treatment. Larger homes with two or three zones, or older homes with difficult duct access, can take a full day. At Linden Air Duct San Francisco, we’ll give you a time range when you book, and the tech’s name and photo arrive before the visit.
How often should I sanitize my air ducts in San Francisco?
For most San Francisco homes, every two to three years is reasonable. Homes in fog-belt neighborhoods like the Sunset and Richmond may benefit from more frequent treatment, especially if duct humidity is a recurring issue. Homes with pets, smokers, or residents with respiratory conditions should consider annual treatment. After a heavy wildfire smoke season, a one-time sanitizing is worth doing even if you’re not on a regular schedule.
Does sanitizing remove mold from air ducts?
Sanitizing with an antimicrobial fogging agent kills surface mold spores on duct interiors. If there is substantial visible mold growth or standing water in the system, the affected duct sections may need to be cleaned, repaired, or in severe cases replaced, which is a separate line item. We’ll show you exactly what we find when we inspect, so you know what you’re paying for and why. Before any sanitizing work, call (951) 527-6259 to describe what you’re seeing; we’ll give you an honest read on whether sanitizing will solve it.
Does homeowners insurance cover air duct sanitizing?
Most San Francisco homeowners insurance policies do not cover routine air duct sanitizing. Coverage may apply if the sanitizing is part of repair after a covered event like water damage from a burst pipe, but routine maintenance is out of pocket. We can provide an itemized receipt for any treatment you have done, which can help in cases where partial coverage might apply. If you’re not sure, your insurance agent is the best source of truth on your specific policy.
Can you sanitize air ducts without cleaning them first?
Technically yes, but we don’t recommend it in most San Francisco homes. If the ducts are carrying years of dust and debris, the sanitizing agent can’t fully reach the surfaces beneath that buildup. For ducts that haven’t been cleaned in five or more years, we recommend a combined cleaning and sanitizing treatment, which runs $450 to $850 for a typical single-family home in San Francisco. You’ll get a better result and you won’t pay for two separate visits later.
Get a Written Quote for Air Quality & Sanitizing in San Francisco
If you’re in the Sunset, Richmond, Noe Valley, Bernal Heights, the Mission, or anywhere else in San Francisco, we’ll give you an honest assessment of what your system needs and exactly what it will cost. No obligation. No pressure. A live person answers when you call, any time of day or night, at (951) 527-6259.
Our home page has more about who we are and how we work. If you want specifics on what the treatment involves, read our full Air Quality & Sanitizing in San Francisco service page, which covers the process step by step.
When you call, we’ll ask a few quick questions about your home size, how many levels you have, and whether you’ve noticed odors or allergy symptoms. From there, we’ll give you a real dollar range before you decide anything. The tech’s name and photo arrive before the visit, and a photo ID badge is shown at the door. Everything in writing, every time.
Written by Marcus Veale, Owner at Linden Air Duct San Francisco, serving San Francisco homeowners since 2004.
Pricing reflects the San Francisco market as of 2026. Linden Air Duct San Francisco offers free estimates – call (951) 527-6259.
What Our Customers Say
"We had construction dust packed into every register after a remodel. They sealed off the returns, used negative pressure, and left the floors cleaner than they found them."
- Paul E."Allergy season was brutal for my kid. After the cleaning there was a noticeable drop in sneezing at night. They also replaced a cracked flex duct in the attic."
- Omar D."Priced by the system, not by the vent, and he told me up front. No pressure to add the sanitizer and I said no without any fuss."
- Faith N.