Frequently Asked Questions

We start by inspecting your system and protecting your floors and furnishings around each vent. Then we connect a powerful negative-air vacuum to your ductwork, which keeps dust from blowing into your living space during the work. We agitate the duct walls with rotating brushes and compressed air tools, pulling loosened debris into the vacuum's HEPA filtration. Every vent, return, and accessible section of main trunk line gets worked. Finally, we clean the registers and do a visual check before we pack up. You see before-and-after photos of your own ducts before you pay.

Most single-family homes in San Francisco take between two and four hours, including setup, the cleaning itself, and the final walkthrough. Smaller condos and apartments, common in areas like Hayes Valley and Mission Bay, often finish in under two hours. Larger homes with multiple furnace zones or very old ductwork can push toward a half day. We schedule in windows rather than rushing, because doing the job right means letting the vacuum pull properly and checking each run as we go. We'll tell you upfront how long your home should take based on its size and system layout.

Not much, but a few small things help. If you know where the furnace or air handler is, please make sure there's a clear path to it and that any stored items around it are moved a few feet back. If vents are behind heavy furniture, we can usually work around them, but giving us six inches of clearance speeds things up. We protect floors, wear shoe covers, and lay drop cloths at every vent we open. If you have pets, we'll coordinate to make sure they're comfortable and not startled by the equipment while we work.

No. The whole point of the negative-air system is that dust gets pulled out of your ducts and into our equipment, not pushed into your rooms. We seal each vent as we work and keep the furnace fan running where appropriate to carry loose particles to the vacuum. Floors are protected with drop cloths, our techs wear shoe covers, and we clean up after ourselves at each register. Before we leave, the areas around the vents look the way they did when we arrived, and we show you photos of what we pulled out of your system so you know exactly what you paid for.

Most San Francisco homes benefit from a full duct cleaning every three to five years. That cadence stretches longer in newer construction with well-sealed ductwork, and shorter in older homes with pets, smokers, or a recent renovation. Homes in fog-heavy districts like the Outer Sunset and Ingleside often see faster buildup because moisture makes dust cling to the duct walls instead of blowing through. A good rule: if you see visible dust around vent registers within days of vacuuming, or if your furnace filter clogs faster than it used to, it's time to call (951) 527-6259 and have us take a look.

Yes, and we do it often. Condos in areas like SoMa, Dogpatch, and Russian Hill have centralized or semi-centralized HVAC systems with common duct runs and we know how to work within HOA rules for building access and mechanical rooms. The process is the same as for a house, but scheduling can require building management coordination for main trunk access. If you're a condo owner, check your HOA's rules on maintenance access, and we'll handle the rest. The flat per-system price still applies. Call (951) 527-6259 and we'll talk through how it works in your building.

The vacuum unit makes moderate noise while it runs, similar to a strong shop vac running in one room. The agitation tools add a soft whirring. Most of the sound is concentrated near the equipment, not throughout the house. If you're working from home, you'll know we're there, but it won't shake the walls. We schedule in advance and let you know what to expect, so you can plan calls or meetings around the visit. Neighbors in shared-wall buildings like those in the Castro and Bernal Heights rarely notice much, especially with windows closed.

We use commercial-grade negative-air vacuums from trusted names like Abatement Technologies and Guardsman, paired with rotary brush and compressed air agitating tools. Our HEPA-filtered containment systems capture fine dust and allergens that budget machines simply recirculate. The equipment matters because San Francisco homes often have tight mechanical closets and original vent runs that need careful, powerful extraction, not a quick pass with a shop vac. Every job uses the same standard of equipment, whether it's a studio in the Tenderloin or a full house in Sea Cliff.

We can help with basic filter advice while we're in your home, and we'll point you toward quality filtration brands like Honeywell and Aprilaire if your system would benefit from an upgrade. We don't hard-sell or bundle equipment you don't need. If your existing filter housing is standard and you're happy with it, we'll tell you that and move on. If your system is running a cheap fiberglass filter that's letting everything through to your freshly cleaned ducts, we'll show you why a mid-range pleated filter might be the better long-term play for a fog-city home.

We can discuss adding dryer vent cleaning to your service when we quote the job. That's a different system from your HVAC ducts, and it's a common need in San Francisco, where lint and moisture can combine into a sticky blockage. Some homes in multi-story Victorians have long, angled dryer runs that are prime spots for buildup. We'll tell you if yours looks like a candidate and include it in your written quote as a separate line item, not a surprise add-on. That way, you decide before any work starts.

Every pro working under the Linden Air Duct Cleaning name in San Francisco is required to hold the licensing and insurance the state of California mandates for this work. When a technician arrives at your door, they'll be wearing a photo ID badge and you'll already know their name and face from the notification we send before the visit. That's part of the Threshold Standard: identity-verified professionals, properly credentialed, arriving in a marked uniform and ready to show you proof at the door. You shouldn't have to wonder who you just let into your home.

You'll know before we arrive. Every Linden Air Duct Cleaning technician in San Francisco is background-checked and identity-verified, and we send you the tech's name and photo before the visit. At the door, they'll show a photo ID badge and arrive in a clean, marked uniform. If anyone shows up who you weren't told to expect, that visit is on us and we make it right. That's our promise, and it's in writing. For homeowners who are often alone, parents with young kids, or older residents, knowing exactly who's at the door isn't a luxury. It's the whole point.

Linden Air Duct Cleaning operates through a national family of brands, delivered by independent local businesses that agree to work to the Threshold Standard. Each pro who services San Francisco homes is background-checked, identity-verified, and required to hold the license and insurance their state requires. What that means for you is simple: the person at your door is known to us by name, photo, and history before they ever ring the bell. We don't send strangers. We send a named professional whose credentials are verified before they step onto your property.

Duct cleaning is not emergency work in the way a burst pipe or a dead furnace is, and we're honest about that. What we can do is schedule you as soon as our calendar allows, and we'll treat post-flood, post-fire, or post-remodel situations with the urgency they deserve. Our San Francisco phone line is answered by a live coordinator during business hours: Monday through Friday 7:00 AM to 7:00 PM, and Sunday 7:00 AM to 7:00 PM. Call (951) 527-6259 and we'll work with you on the soonest available slot.

In most cases, yes. Our San Francisco schedule book fills up, but we hold times for new customers who need a faster turn, especially after a remodel kicks up drywall dust or a water event leaves musty air moving through the house. We operate Monday through Friday from 7:00 AM to 7:00 PM and Sunday 7:00 AM to 7:00 PM, closed Saturdays. When you call (951) 527-6259, our coordinator will tell you the real availability, not a vague promise. If we can't get to you that week, you'll know that too, and we'll book you at the first honest opening.

You're covered by the Threshold Verified promise, which means every technician is background-checked, identity-verified, photo-badged, and sent to you by name and photo before the visit. If anyone arrives who you were not told to expect, that visit is on us and we make it right. For service issues, our team follows up and addresses the concern. We don't dodge calls and we don't disappear after the invoice clears. If the work didn't meet the standard we described, we want to know, and we'll work with you toward a resolution.

Yes. Every job we do in San Francisco is covered by Threshold Verified, which includes the customer protection guarantee that ties directly to who we send and what we promise. We put the price in writing before any work starts, so you know exactly what the job includes and exactly what it costs. If anything about the experience doesn't match what we described, we want to know and we'll make it right. That's the whole reason the guarantee exists: so you're not relying on trust alone, you're relying on a written commitment.

Threshold Verified is the standard behind every Linden Air Duct Cleaning visit. It means five things, and they all happen on every job: every technician is background-checked and identity-verified; we send the tech's name and photo before the visit; they show a photo ID badge at the door every time; they arrive in a clean, marked uniform; and the price is put in writing before any work starts. Each location is an independent local business that agreed to work to that standard. In San Francisco, Marcus Veale's team operates under it on every visit.

Tell us. We don't consider the job finished until you've walked the home, seen the before-and-after photos, and are satisfied the system was cleaned as outlined in your written quote. If after we leave you find something that doesn't seem right, call (951) 527-6259 and we'll review the situation. The Threshold Verified promise exists because homeowners who open the door to a stranger deserve recourse if the experience falls short. We'll work it out with you. That's the deal, and it's in writing before the first tool comes off the truck.

We're available to the homeowners we serve in San Francisco after the job is done. If a question comes up about your system, your filters, or something you noticed after we left, call (951) 527-6259 and we'll talk it through. We can also schedule a follow-up visit if warranted. The relationship doesn't end when the invoice is paid. You have a named local team, led by Marcus Veale, that knows your home's system and can answer questions that come up down the road. That's the way it should work when a local company services your home.

Written by Marcus Veale, Owner at Linden Air Duct San Francisco, serving San Francisco and the Bay Area with Threshold Verified air duct cleaning since 2004.