Air Duct Cleaning in Millbrae, CA

Frequently Asked Questions

1. Our ducts are original to the house — do we clean them or just replace them?

   Most Millbrae homes we see are postwar tract ranches and split-levels with short sheet-metal runs off a closet or garage furnace, and that galvanized metal holds up well. If the trunk and branches are intact and the seams are sound, cleaning is the right call and replacement is overspending. We'd steer you toward replacement only when we find real damage: crushed or disconnected sections in a shallow crawlspace, flex that's been patched in over the years and has torn or collapsed, or corrosion where salt-laden damp air has been sitting against the metal. We'll tell you which category your system falls into after we look. We don't do duct replacement work ourselves, so there's nothing in it for us either way.

2. How soon can you get someone out here?

   Millbrae is compact and close to the main corridor through the Peninsula, so getting a truck here isn't the problem. In most weeks we can book within a couple of days. The tighter stretch is late September into October, when people fire up the furnace for the first time, smell something off, and call all at once. If you're planning ahead of heating season, book before that rush and you'll have your pick of times.

3. What usually goes wrong with ducts in houses around here?

   A few things come up repeatedly. Crawlspace runs on the hillside streets above El Camino sit close to grade in damp ground, so you get musty-smelling air and sometimes rodent intrusion at the boots. The furnace is often jammed into a narrow hall closet or a garage corner, and the return is undersized or has been blocked by storage, so dust loads up fast right at the filter. The ambient air out here carries aircraft and ground-vehicle particulate from the airport along with bay salt, and because a lot of households keep windows shut for the noise, that load keeps cycling through the ducts instead of airing out. Homes with no AC run everything through one heating system, so whatever is in those ducts is what you breathe from October on.

4. What drives the cost up or down on a Millbrae house?

   The typical single-story slab ranch here is on the simpler end: short duct runs, a modest register count, and one furnace means less labor than a sprawling multi-zone system. What pushes it the other direction is access. Shallow crawlspaces on the hillside lots are slow going, and a furnace wedged into a hall closet takes longer to open up and work around than one sitting in an open garage. Split-levels with runs feeding two floor heights also add time. We walk the house, count registers, and look at how the furnace is situated before quoting, and the number reflects those conditions rather than a flat per-house figure.