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.
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AfterFast, Reliable Air Duct Cleaning Across Berkeley
Air duct cleaning in Berkeley typically runs $350 – $650 for a full residential system, and most jobs are scheduled within a week of your call. We’re Hollis Air Duct Cleaning, and our crews serve Berkeley from our San Francisco Bay Area dispatch office. If you live in Elmwood, North Berkeley, or the Claremont district, you’ve probably got a pre-1940 home with ductwork that was never designed for modern forced-air systems. We know what to look for. Call (361) 326-5060 for a free estimate, or keep reading to see what we actually find in Berkeley houses.
Why Hollis Air Duct Cleaning Is Berkeley’s Preferred Air Duct Cleaning Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Air Duct Cleaning team has worked on enough Berkeley homes to know the difference between a standard clean and one that actually fixes the problem. Our technicians are background-checked, uniformed, and expected to operate by The Garrison Code: arrive inside the quoted window, price the job in writing before touching anything, complete the work by the book, and leave the site clean.
Every job carries our 365-Day Done Right Promise in writing. If the work fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround. Our phones are answered by a live person 24 hours a day, seven days a week. When you call (361) 326-5060, you talk to a human who can schedule your Berkeley appointment, not a voicemail loop.
We don’t compete on teaser prices that balloon once the van is in your driveway. We compete on discipline: written price, written guarantee, and equipment that matches what commercial crews use. That includes Rotobrush rotary brush systems, Nikro negative-air machines, and HEPA filtration from Abatement Technologies.
Air Duct Inspection in Berkeley
Air Duct Inspection in Berkeley starts with the understanding that your ductwork may not match what the original blueprints show. We run a video camera through the main trunk and branch lines to map crushed returns, disconnected runs, and openings that pull air from your crawlspace instead of your rooms. In Berkeley’s older neighborhoods, this step isn’t optional. It’s how we find the problems that a standard cleaning would miss entirely.
A typical camera inspection in Berkeley runs $150 – $250 as a standalone service, or it’s included when you book a full system cleaning. We inspect before we quote the cleaning, so you know exactly what we’re dealing with before any work starts.
What We Look For in Older Systems
Gravity furnaces in pre-1940 Berkeley homes often have supply and return ducts that were never sealed at the joints. Our camera picks up gaps where ducts pull musty air from unlined dirt crawlspaces, and we note locations where original redwood wainscoting blocks access to hidden runs. We mark every finding on a written report with photo stills from the inspection.
Slab-Embedded and Hillside Duct Runs
In the Berkeley Hills, some homes have duct runs embedded in concrete slab foundations. These require special rotary brushes to remove compacted dust without damaging aging metal. Our inspection identifies which runs are accessible, which need targeted cutting, and where sealing work will matter most for your indoor air quality.
Residential Air Duct Cleaning in Berkeley
Residential Air Duct Cleaning in Berkeley means dealing with decades of accumulation in systems that were undersized, unsealed, or modified by multiple remodels. We don’t just vacuum the registers. We use source-removal methods: Rotobrush agitation to loosen compacted dust, Nikro negative-air machines to pull debris out of the system under controlled pressure, and Abatement Technologies HEPA filtration so nothing recirculates into your home during the job.
A full residential cleaning in Berkeley typically costs $350 – $650 for a single system, depending on accessibility, the number of branch lines, and whether we find disconnected or crushed ducts that need repair before sealing. We write the price down before we start, and it does not move at the door.
Source Removal vs. Surface Cleaning
Standard vacuuming stirs up dust and leaves it behind. Our source-removal approach agitates the duct walls, suspends the debris in airflow, and extracts it under negative pressure. In Berkeley’s humid climate, this matters. Mold and mildew grow on organic material left inside damp ductwork. We remove the food source, not just the surface layer.
Mastic Sealing After Cleaning
Cleaning unsealed ductwork in Berkeley is a temporary fix. We apply duct sealing mastic to joints and gaps after source removal, so your system stops pulling crawlspace air and starts moving conditioned air only. This step is what keeps dust and musty odors from returning within a season.
Trusted Brands We Service in Berkeley
Our equipment roster includes Rotobrush rotary brush systems for agitation, Nikro negative-air machines for debris extraction, and Abatement Technologies HEPA filtration to protect your home during the job. For homeowners adding filtration after a cleaning, we stock Honeywell and Aprilaire media filters and can advise on MERV ratings that balance particle capture with airflow in older Berkeley systems. Many pre-1940 gravity furnaces and early forced-air conversions can’t handle the static pressure of high-MERV filters without modification. We measure your system’s capacity and recommend accordingly, so you don’t trade one problem for another.
Common Air Duct Cleaning Problems We See in Berkeley Homes
- Original gravity furnaces with unsealed over-crawlspace runs. In Elmwood, North Berkeley, and Claremont, return ducts often sit open on unlined dirt, pulling soil gas, mold spores, and dust into living spaces with every heat cycle. Cleaning without sealing these joints leaves the root cause intact.
- Crushed or disconnected branches hidden behind original redwood wainscoting. Multiple remodels have buried duct access points. Standard negative-air cleaning misses these entirely. We locate them with camera inspection and open targeted access to reconnect or replace the damaged sections.
- Slab-embedded duct runs in Berkeley Hills homes. Decades of compacted dust in aging metal ducts embedded in concrete require rotary brush tools that won’t damage the structure. We’ve developed specific protocols for these installations.
- Year-round moisture promoting mold growth inside ductwork. Berkeley’s marine climate means fog and winter rains keep humidity elevated, especially in poorly ventilated older homes. Surface cleaning alone doesn’t solve this; source removal plus moisture control through proper sealing does.
Pricing for Air Duct Cleaning in Berkeley, CA
Here’s what honest pricing looks like for Berkeley’s market:
- Camera inspection (standalone): $150 – $250
- Full residential system cleaning: $350 – $650
- Commercial system cleaning: $800 – $1,800 depending on square footage and access
- Duct sealing with mastic (after cleaning): $200 – $500 additional
- Disjointed or crushed branch repair: $150 – $400 per location
What moves the price: accessibility (crawlspace height, wainscoting that needs temporary removal), number of branch lines, and whether we find damage that requires repair before sealing. We inspect first, write the full price down, and get your approval before any work begins. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Berkeley
Our crews work throughout the East Bay. If you’re in Berkeley or nearby, we also schedule appointments in Emeryville, Albany, El Cerrito, and Piedmont. The same written pricing, same 365-Day Done Right Promise, same background-checked technicians at every stop.
Serving Berkeley, CA - Our Local Coverage Area
We’re based in the Berkeley 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 Berkeley
Yes. Gravity furnaces operate at lower pressure than modern forced-air systems, so dust compacts differently in the ducts and the returns often pull from unsealed crawlspace openings. We use lower-agitation rotary brushes and spend more time on camera inspection to locate unsealed joints before cleaning. Call (361) 326-5060 and we’ll walk through what your specific system likely needs.
Because multiple remodels have buried or crushed duct branches that standard cleaning equipment can’t reach. In Elmwood, we regularly find disconnected returns behind original redwood wainscoting that have been pulling crawlspace air for decades. Opening targeted access lets us remove the accumulated debris, repair the damage, and seal the system properly. We discuss every access point with you before cutting, and we restore finished surfaces as part of the job.
Usually both. Unsealed ductwork in Elmwood’s pre-1940 homes creates a direct path between damp dirt crawlspaces and your living space. The musty odor is often mold spores and soil gases entering through gaps in the return ducts. We determine the source with camera inspection, then remove the contamination from the ducts and seal the entry points so the crawlspace stays separate from your indoor air. Call (361) 326-5060 for an inspection if you’re smelling mustiness every winter.
No. Your heating and cooling systems may run less than in hotter or colder climates, but Berkeley’s year-round dampness from fog and winter rains creates ideal conditions for mold and mildew growth inside ductwork, especially in older homes with poor ventilation. Less runtime means less airflow to dry out moisture, so biological growth can actually accumulate longer undisturbed. Cleaning every three to five years, with sealing where needed, prevents this buildup from affecting your air quality.
For most older Berkeley systems, MERV 8 – 11 strikes the right balance. Higher MERV ratings catch smaller particles but create static pressure that gravity furnaces and early forced-air conversions often can’t handle. We measure your system’s airflow capacity and recommend a filter that improves air quality without overworking the blower or reducing comfort. Honeywell and Aprilaire both make media filters in this range that we stock locally for Berkeley customers.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Berkeley and the San Francisco Bay Area since 2004.