About Us

San Mateo sits in the middle of a stretch of Peninsula that runs from South San Francisco down to Menlo Park, and the conditions here are specific. Long dry summers with almost no rain, fine road and construction dust, grass pollen off the hills from spring into early summer, oak and acacia pollen in late winter. Then November through March brings high humidity and fog that doesn't burn off. The temperature band is mild enough that most systems cycle on and off instead of running hard, so the air never moves fast enough to scour the duct interior. Debris settles and stays. In crawlspaces it gets worse: cold metal in a damp, poorly ventilated subfloor means condensation, mold growing on dust films, and rodents working their way in through crushed or torn flex. Closer to the bay, salt air corrodes exterior-adjacent ductwork and equipment. Most of our calls here come down to one of those four things.

Housing era drives this work more than weather does. A lot of San Mateo homes predate 1970, which usually means original galvanized sheet metal trunks running through the crawlspace, sometimes with asbestos-era wrap on the oldest systems. Newer builds and hillside homes tend to have 1980s to 2000s flex duct retrofits run through the attic. Those two setups need different handling, and we check which one you have before quoting anything. On site we bring a truck-mounted vacuum, seal off every register in the house so the system pulls negative, and work the trunks and branches with rotary and hand brushes to knock material loose into the airflow instead of pushing it into your rooms. We open and clean the supply and return plenum, pull the blower compartment, and photograph what we find. We service Carrier, Trane, Lennox, Goodman, Rheem and American Standard equipment. If we find torn flex, rodent entry points, or leaking joints while we're under there, we'll tell you, and duct sealing is often the repair that matters more than the cleaning itself. Evaporator coils caked with dust get handled separately through coil cleaning, since a dirty coil puts material right back into clean ducts.

Plenty of times we show up, scope the system, and tell people they don't need us yet. A well-sealed newer system in this area holds up fine for four to seven years between cleanings. Pre-1970 crawlspace systems run closer to three to five. Renovation dust, rodent activity, or a wildfire-smoke season pulling Central Valley and North Bay smoke onto the Peninsula moves that up. If your ducts are clean and the real problem is a loaded filter, we'll say so and point you toward air filter replacement instead of selling you a service you don't need. On cost, the things that move the number on a duct cleaning here are the count of supply and return runs, whether the trunks are in a tight crawlspace or an accessible attic, how much rodent contamination we're dealing with, and whether the old duct wrap needs a licensed abatement contractor before anyone touches it. We walk the system first and tell you what applies to your house.