Whole-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.
Before
After
Before
After
Before
AfterFast, Reliable Air Duct Cleaning Across San Mateo
Air duct cleaning in San Mateo typically runs $450-$850 for a full residential system, with most homes in the $550-$700 range depending on duct accessibility and whether resealing is needed. Our crews are scheduled from our San Francisco Bay Area office and work San Mateo neighborhoods regularly, from Baywood to Shoreview to North Shoreview. If you’re noticing musty airflow, uneven heating, or you’ve never had the ducts cleaned since moving into one of San Mateo’s mid-century homes, call (323) 918-4345 for a free written estimate before any work starts.
We’re familiar with the specific challenges of San Mateo housing. The 1950s-1970s ranch homes that dominate this city weren’t built for forced air. HVAC came later, retrofit through crawl spaces that weren’t designed for it. That history matters when we’re routing brushes and cameras through your system. We know what to look for because we’ve cleaned ducts in these exact floor plans dozens of times.
Why Morton’s Air Duct Cleaning Is San Mateo’s Preferred Air Duct Cleaning Company
Paul Adeyemi has led Morton’s Air Duct Cleaning since 2005, and our reputation in San Mateo has grown through neighbors telling neighbors. Families here appreciate that we send background-checked, uniformed technicians who put on shoe covers before stepping inside and lay drop cloths the moment they arrive. We work to the Cedarwell C.A.R.E. values, which means quiet tool operation during nap hours and pet-safe product choices where available.
Our response time to San Mateo is typically next-day or within 48 hours for standard scheduling. We don’t promise same-day dispatch because duct cleaning is a planned job that deserves proper preparation, not a rushed visit. Every appointment includes a written price agreed before work begins, backed by our 365-Day Done Right Promise. If something isn’t right, we make it right. Full stop.
Local knowledge separates a thorough job from a superficial one. We know San Mateo’s coastal fog pattern keeps crawl spaces damp year-round, especially in lower-elevation neighborhoods. We know the retrofit flex duct common in these homes degrades differently than ductwork in newer construction. And we know that cleaning without inspecting for disconnected runs is incomplete work.
Air Duct Cleaning Services in San Mateo
Air Duct Cleaning Services in San Mateo address the accumulated debris, moisture damage, and degraded connections found in the city’s aging residential ductwork. A typical residential cleaning covers all supply and return ducts, the main trunk lines, and the plenum connections at the furnace, using professional-grade equipment from Rotobrush and Nikro with HEPA-filtered negative pressure containment. For a standard 1,500-2,500 square foot San Mateo home, expect $550-$750; larger homes or those requiring extensive resealing run $750-$950.
Residential System Cleaning
We clean the full duct network from each vent back to the air handler, including supply branches, return pathways, and the main collector boxes. In San Mateo’s ranch homes, this often means navigating long straight runs with multiple 90-degree turns added during retrofit. Our Rotobrush systems handle these configurations without damaging original duct lining.
Video Inspection Before and After
Every San Mateo job starts with a camera inspection. We’ve found crushed flex duct, rodent damage, and complete disconnections hidden in crawl spaces that homeowners never knew existed. The after-cleaning video confirms source removal and documents any structural issues needing repair.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
HVAC Duct Cleaning in San Mateo
HVAC Duct Cleaning in San Mateo focuses on the complete forced-air system, including components beyond the ductwork itself. We clean the evaporator coil, blower assembly, and plenum connections where moisture and debris collect, using professional equipment from Abatement Technologies and Guardsman. This matters especially in San Mateo, where the marine layer creates conditions that standard inland cleaning protocols don’t address. A full HVAC duct cleaning runs $650-$950 for typical residential systems.
Coil and Blower Decontamination
The evaporator coil and blower wheel trap moisture from San Mateo’s humid air, creating a biofilm that recirculates musty odors even after ducts are cleaned. We remove and clean these components separately, treating the entire air path, not just the tubes.
Resealing and Mastic Repair
Cleaning reveals the real condition of duct joints. In San Mateo’s vented crawl spaces, we frequently find degraded tape and separated flex duct connections. We reseal with mastic and mesh, not duct tape, because tape fails again within months in damp conditions. This step is often the difference between lasting results and a recurring problem.
Trusted Brands We Service in San Mateo
We clean and service ductwork connected to all major HVAC brands, and we stock common fittings and replacement materials for faster turnaround on San Mateo jobs. Our equipment comes from Rotobrush, Nikro, and Abatement Technologies, brands chosen for reliability in the demanding conditions of older residential systems. For filtration upgrades after cleaning, we work with Honeywell and Aprilaire components. We don’t use rental-grade equipment that lacks the suction power for long ranch-home duct runs or the HEPA containment needed when mold is present. If your system needs a part we don’t carry, our dispatch coordinates next-day delivery through San Francisco Bay Area suppliers.
Common Air Duct Cleaning Problems We See in San Mateo Homes
- Sagging flex duct in Shoreview crawl spaces. The 1970s-era flex duct common in this neighborhood loses tension over decades, sagging below the insulation vapor barrier where it contacts damp soil or pools of condensate. We find runs that have pulled completely free of the boot, circulating crawl space air instead of conditioned air.
- Mold colonization in supply ducts from chronic humidity. San Mateo’s persistent marine fog keeps ambient humidity higher than inland Peninsula cities. Ductwork that runs infrequently in this mild climate never dries completely, allowing mold to establish in the porous lining of original fiberboard ducts.
- Improperly sealed retrofit connections at the plenum. When forced air was added to post-war homes, installers often used temporary fixes that have degraded. We find gaps at the furnace plenum where unfiltered crawl space air enters the return side, bypassing the filter entirely.
- Crushed or kinked duct runs in tight attic spaces. Retrofit installers in the 1960s and 1970s sometimes routed flex duct through framing members never intended to carry it. Over years, the compression worsens airflow and creates debris traps that standard cleaning misses without camera verification.
Pricing for Air Duct Cleaning in San Mateo, CA
Most San Mateo homeowners pay between $550 and $750 for a complete residential air duct cleaning covering supply and return ducts, main trunks, and basic resealing of accessible joints. Larger homes above 3,000 square feet, or those with extensive crawl space ductwork requiring significant resealing, typically run $750-$950. Full HVAC duct cleaning including coil and blower service adds $100-$200.
What affects your specific price: the number of vents and returns, accessibility of crawl space or attic ductwork, whether video inspection reveals disconnected runs needing repair, and the extent of resealing required after cleaning. We don’t quote per-vent pricing because it encourages rushed, incomplete work. Instead, we assess your complete system and give one flat price per system, agreed in writing before we start.
Every estimate is free. There’s no charge for our technician to inspect your ductwork, explain what we found, and provide a written price. Call (323) 918-4345 to schedule.
We Also Serve Cities Near San Mateo
Our crews work throughout the mid-Peninsula. If you’re in San Mateo, Burlingame, Belmont, Millbrae, or San Carlos, we schedule from the same Bay Area dispatch and carry the same equipment, pricing structure, and Cedarwell Care Promise standards. Our Air Duct Cleaning team coordinates appointments across all these communities.
Serving San Mateo, CA - Our Local Coverage Area
We’re based in the San Mateo 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 Cleaning in San Mateo
San Mateo’s bayside position traps overnight marine fog that keeps crawl spaces and attics damp for extended periods, moisture that migrates directly into poorly sealed duct joints. Inland cities like San Jose or Redwood City don’t experience the same persistent humidity blanket, so their ductwork dries more completely between heating or cooling cycles. If you smell mustiness when your system runs, call (323) 918-4345 for a camera inspection.
We start with video inspection of all accessible duct runs, then use agitation tools and HEPA-filtered negative pressure to source-remove debris from supply and return pathways. For these retrofitted systems, we almost always find degraded sealing at flex duct connections that requires resealing with mastic to prevent recontamination. A typical 1960s ranch runs $550-$750 depending on vent count and crawl space accessibility.
Yes, resealing is often as critical as the cleaning itself in these neighborhoods. The vented crawl spaces and original retrofit ductwork in Shoreview and Baywood have endured 40-60 years of bay-humidity exposure, and cleaning disturbs old tape and mastic that was already failing. We reseal accessible joints as standard practice, included in our written price, because leaving them open invites immediate recontamination.
The marine layer’s chronic humidity means San Mateo homeowners should inspect ductwork more frequently than drier inland areas, typically every 3-5 years rather than the 5-7 year standard for dry climates. Systems that run infrequently in San Mateo’s mild weather allow moisture and debris to sit undisturbed, accelerating mold growth. If your home is in a lower-elevation neighborhood like Shoreview where fog lingers longest, lean toward the shorter interval.
We clean ductwork connected to all HVAC manufacturers and use professional equipment from Rotobrush, Nikro, and Abatement Technologies for the cleaning itself. For filtration and component upgrades, we work with Honeywell, Aprilaire, and Guardsman materials. Brand of equipment doesn’t affect our ability to service your system. Call (323) 918-4345 to discuss your specific setup.
Ready to see what’s inside your ducts? Call (323) 918-4345 for a free written estimate. We’ll inspect your system, explain exactly what we found, and give you one flat price before any work begins. Every job is backed by our 365-Day Done Right Promise, and you’ll receive a photo of the clean-up before our crew leaves.
Written by Paul Adeyemi, Owner at Morton’s Air Duct Cleaning, serving San Mateo since 2005.