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.
Fast, Reliable Air Duct Repair Across Daly City
Air duct repair in Daly City typically costs between $350 and $1,400 depending on what we find once we open the system, and most repairs are completed the same day we diagnose the problem. That’s the direct answer. If you live off Southgate or up in the Westlake slope, you already know the signs: one bedroom that never warms up, a dusty smell when the furnace kicks on, or a register that barely moves a tissue. We work in Daly City every week, and our Air Duct Repair team knows exactly what these 1950s tract homes hide in their crawl spaces. Call (951) 527-6259 and we’ll send a background-checked technician who arrives with a written price before any work begins.
Why Linden Air Duct San Francisco Is Daly City’s Preferred Air Duct Repair Company
Daly City homeowners call us because we tell them the truth about what’s in their ducts, and then we put the fix in writing. Every repair we do comes with a written guarantee and a free second visit if the repair fails within 365 days. That’s the Done Right Promise, and it’s not a sales line. It’s on every invoice.
Our technicians know the Westlake district’s original 1950s floor plans, the crawl-space access points on hillside lots, and the way marine fog eats at metal duct joints over decades. When we schedule a repair in Daly City, you get the technician’s name and photo before the visit. At the door, you’ll see a photo ID badge that matches the person you were introduced to. That’s the Threshold Standard, and it applies to every single job, no exceptions.
Marcus Veale, our lead technician, has repaired more fog-corroded duct runs in Daly City than most companies will ever inspect. He’s the one who trains our crew on spotting the failure modes specific to this area. When scheduling and dispatch come from our San Francisco Bay Area office, the crews are local, the parts vans are stocked, and the phone is answered by a live person 24 hours a day.
Styles & brands we work with
Ductwork Installation in Daly City
Ductwork Installation in Daly City usually means replacing sections of original sheet-metal supply runs that have corroded, crushed, or simply come apart at the joints. In a 1950s Westlake home, the original ducts were sized for a much simpler era. Sealing a few joints might cost $350 to $600. Replacing a crushed 15-foot crawl-space run with properly insulated flex duct runs $800 to $1,200. A full supply-side replacement for a moderate single-family home lands between $1,500 and $3,200.
What actually happens during a replacement
We cut out the failed section, size the new duct to match the air handler’s static pressure, and seal every connection with mastic, not foil tape. Mastic seals stay flexible as Daly City’s temperature and humidity shift. Foil tape dries and peels within a few years.
When a repair becomes an installation
If our camera inspection shows more than half the run is rusted through or collapsed, patching becomes throwing money away. We’ll show you the footage before quoting the replacement. You decide with your own eyes.
HVAC Duct Installation in Daly City
HVAC Duct Installation in Daly City is the full-system version of the job: supply runs, return runs, plenum connections, and the fittings that tie into the furnace or heat pump. In Daly City’s mild but moisture-heavy climate, the return side matters as much as the supply side. A leaky return pulls crawl-space air straight into your living space, fog-chilled and heavy with whatever lives under the house. Whole-system installation for a typical 1,400-square-foot Daly City home runs $3,500 to $6,800, depending on access and the number of runs.
MERV-rated upgrades for older tract homes
The original 1950s systems in Westlake were built before MERV ratings existed. A modern MERV 11 filter at the air handler, which we stock from Guardsman, can strain an aging blower motor. When we install new ductwork, we check static pressure so the filter upgrade doesn’t burn out the motor in a season.
Return-side work matters most
Daly City homes with single central returns often starve for airflow when bedroom doors close. We add return paths where needed. It’s the difference between a system that works on paper and one that heats a bedroom in August fog.
Trusted Brands We Service in Daly City
We repair and install ductwork from every major system type found in Daly City homes, and we stock parts from trade-trusted names including Rotobrush, Nikro, and Abatement Technologies. That means faster turnaround when a section of your duct fails and you don’t want to wait two weeks for a backordered part. If you have an existing Honeywell or Aprilaire filtration component, we’ll test it during the repair and tell you if it’s still doing its job. No upselling. Just facts.
See the difference
Before
After
Before
After
Before
AfterCommon Air Duct Repair Problems We See in Daly City Homes
- Crushed crawl-space supply runs. Original 1950s sheet metal gets soft after decades of damp marine air. A prior remodel or a contractor crawling through can twist a run nearly shut, and one bedroom stays cold no matter what the thermostat says.
- Fog-corroded joints and disconnected sections. Salt-laden air settles on metal joints and eats at the seams. We regularly find supply runs that have simply fallen apart, bleeding conditioned air into the crawl space.
- Sticky dust from moisture condensation. Cool metal ducts in Daly City’s humid marine layer gather condensation, and the dust sticks instead of blowing through. Registers clog, airflow drops, and blower motors overheat until they fail.
- Long hillside dryer vent runs. On the Westlake slope, homes along Southgate and Lake Merced Blvd often have dryer vents that run 20 to 40 feet to reach an exterior wall. Salt-laden lint packs into the elbows, back-pressure builds, and the dryer thinks the hose is kinked.
Pricing for Air Duct Repair in Daly City, CA
Here are the numbers we give Daly City homeowners before anyone opens a register. Sealing exposed duct joints: $350 to $600. Reconnecting a disconnected crawl-space run: $400 to $700. Replacing a crushed section up to 10 feet: $800 to $1,200. Full HVAC Duct Installation for a moderate Daly City home: $3,500 to $6,800. The main variable is access. A crawl space with 18 inches of clearance costs less labor than one where a technician works on his back under a floor joist. Every job gets one flat price per system in writing before work starts. No per-vent pricing games. Call (951) 527-6259 for an exact quote, free of charge.
We Also Serve Cities Near Daly City
Our crews work all over the northern Peninsula. In addition to Daly City, we regularly repair ductwork in South San Francisco, Pacifica, San Francisco, and Burlingame. If you’re in one of those cities and you’re tired of a bedroom that never heats, the same written guarantee and Threshold Standard apply.
Serving Daly City, CA - Our Local Coverage Area
We’re based in the Daly City area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Repair in Daly City
Because the vent runs are longer and the crawl spaces are wetter. Homes on the slope have extended dryer vent runs and supply ducts that snake around foundation walls to reach exterior registers, and every elbow is a place where salt-laden lint and dust collect. The marine layer keeps those crawl spaces damp, which accelerates corrosion on original metal joints. Flat-lot homes may have similar ductwork but shorter runs and less trapped moisture, so they degrade more slowly. If you’re on the slope and haven’t had your ducts inspected, call (951) 527-6259 and we’ll run a camera through the system before you spend a dollar.
The fog doesn’t just sit outside. It raises indoor humidity, and condensation forms on cool metal ducts inside the crawl space. That moisture settles on joints and seams, and over decades the metal rusts, the joints loosen, and the runs start to separate. It’s not dramatic. It’s slow. The result is a duct system that leaks conditioned air into the fog-chilled space under your house instead of pushing it through your registers. The fix is sealing or replacing the affected sections, which we do with mastic to NADCA standards.
You can repair just the failed section in most cases, and that’s usually all a Daly City home needs. Our camera inspection shows us exactly where the problem is, and we quote only that section unless the footage proves there’s no point patching it. If the metal is rusted through along most of a run, we’ll show you the video and let you decide. A partial repair starts around $350. A full replacement of one run runs $800 to $1,200. You get one written price before work begins either way.
Crushed or disconnected crawl-space supply runs. On a call off Lake Merced Blvd in the Westlake slope, our tech pulled a crushed section of original 1950s supply duct from a crawl space. Decades of moist marine air had softened the metal and a prior remodel had twisted it nearly shut. We reconnected the run, sealed the joints with mastic to NADCA standards, and added a MERV 11 filter at the air handler. The homeowner’s bedroom register finally pushed steady air for the first time in years. It’s the pattern we see all over Daly City, and it’s the first thing we check when someone says one room never heats.
Yes, and the quickest way to know is a camera inspection. If one bedroom is always colder than the rest of the house, the problem is almost never the furnace. It’s airflow. A crushed, disconnected, or undersized run to that room, or a return that’s choked, or both. In Daly City’s 1950s tract homes, the original ductwork was often installed in pieces that shift and settle. The fix can be as simple as reconnecting a joint or as involved as replacing a collapsed run. Call (951) 527-6259 and we’ll find it with the camera before quoting anything.
Written by Marcus Veale, Lead Technician at Linden Air Duct San Francisco, serving Daly City since 2004.