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AirShield Air Duct Care

A Little About Us

Every job we take is within a short drive of San Rafael. Staying local is deliberate: it is how we hold arrival windows and how we get back quickly when something needs a second look.

You call or book online, and we give you an arrival window, not a whole day. The tech calls when he's on the way. Before anything gets unrolled, he walks the house with you, pulls a register cover, looks at the return, and checks the equipment. Then he tells you what he found and what the work would cost for your house, in plain terms, while he's standing there. If the ducts are clean enough to wait another year or two, he says that. We'd rather you call us back in 2027 than pay us today for nothing. That happens often enough on newer Terra Linda and Novato builds with short, tight runs.

The truck carries a vacuum that stays on the truck. We hook the collection line to the main trunk, seal every register in the house so the system pulls negative, then work room by room with rotating brushes and whips pushed down each branch so the debris travels to the vacuum instead of into your hallway. Return drops, the plenum, and the blower compartment get done too, since that's where the loose material usually sits. We work on Carrier, Trane, Lennox, Goodman, Rheem and American Standard systems, and plenty of mixed retrofits where the furnace is newer than the ducting by thirty years. A large share of Marin's stock predates 1960, so most of what we open up is ducting threaded through tight crawlspaces, under floors, or into shallow attics, with undersized returns and long, kinked flex runs added during remodels. Those take longer and we say so before we start.

The calls here follow the weather. Marin County and the adjacent East Bay shoreline sits in a narrow strip between the Pacific, San Pablo and San Francisco bays, and the Mt. Tamalpais ridge, which gives you two climates within a few miles. Fog-cooled coastal and canyon towns hold marine humidity year-round, overnight fog keeps crawlspaces damp, and thinly insulated metal duct sweats until dust on the interior turns into biofilm and a musty smell at startup. Inland in Lucas Valley and Hilltop it runs hot and dry late summer, and six rainless months mean fine mineral dust, oak and grass pollen in spring, and wildfire soot that loads filters and settles in supply runs. Redwood, bay laurel, oak and eucalyptus canopy drop organic debris and spores onto shaded roofs and into attic and crawlspace air, and salt air in Tiburon, Sausalito, Larkspur Landing and Richmond corrodes plenums and condensing units. Most households are fine on a 3-5 year interval; go 2-3 with pets, crawlspace ductwork, a damp canyon lot, or a smoke season spent with the windows shut. What moves the number on a duct cleaning is how many supply runs you have, whether the crawlspace or attic access lets a tech work upright or on his belly, and how much extra the blower and plenum need. If the return is undersized or the flex is crushed, we'll point it out rather than clean around it. Filter replacement is worth doing the same day so clean ducts stay that way, duct sealing matters on crawlspace runs pulling damp air through open seams, and coil cleaning is usually the real fix when the air smells off but the ducts look fine.

air duct cleaning technician on the job in San Rafael, CA

Our service area

We cover San Rafael and the surrounding towns. If you're in one of these areas and have a air duct cleaning problem, call us. We usually get out the same day.

How we decide what to recommend

Should ducts be cleaned? Repaired? Torn out? That question gets answered in the crawlspace, not on the phone. We look first, then say. Sometimes the honest answer is that cleaning solves nothing here.

A few things point straight to replacement. Flex runs crushed behind a remodel wall. Inner liner torn and sucking crawlspace air. Fiberglass duct board that has gone soft and dark from years of marine moisture. Cleaning a saturated liner just moves fiber around. We say so and stop.

Other findings are repairs, not replacements. A separated boot at the floor register. Bare metal trunk sweating in a vented crawlspace because the wrap is thin or gone. That is an insulation problem wearing a mold costume. Shoreline homes near Larkspur Landing and Sausalito sometimes show a plenum pitted by salt air while the branch runs are fine.

Pre-1960 Marin houses need caution. Old tape and mastic on original ducting can contain asbestos. We do not disturb suspect material. Testing comes first, by someone qualified for it.

Undersized returns are common in retrofits. Cleaning will not fix low airflow caused by one small return grille. We tell you which problem you actually have.

Call us at (415) 223-3423. We'll tell you the price before we start. You can also reach us through the contact page if you'd rather send a message.

Call (415) 223-3423