Question 1

My house is a 1950s ranch with floor registers — can those ducts even be cleaned?

Accepted Answer

Usually yes, but it's a different job than a newer home. A lot of the older east and west side ranches were built with under-slab perimeter duct feeding floor registers, and some have sheet-metal trunks running through the attic instead. Under-slab runs collect whatever falls through the floor grilles over the decades, and they can hold moisture, so we check condition before we clean rather than just pushing air through. If a slab run has collapsed sections, rusted-out metal, or standing water, cleaning won't fix it and we'll tell you that instead of charging you to blow dust around. Attic trunk systems in those same neighborhoods are generally straightforward.

Question 2

When is the best time of year to have this done in San Jose?

Accepted Answer

Spring, before the valley heat sets in, is the easiest window. Your AC runs hard from roughly May into October here, and that's months of continuous pull through the returns while grass pollen is coming off the foothills and freeway soot is in the air. Getting ahead of that season means the system starts its heaviest stretch clean. The other common trigger is after a wildfire smoke episode, when people notice a smell coming off the registers the first time the air kicks on. Both are reasonable reasons to call; spring is just the calmer scheduling month.

Question 3

How fast can someone get out here?

Accepted Answer

San Jose is spread out, and that drives the schedule more than anything. Almaden and Evergreen in the south and east, Willow Glen and the older central neighborhoods, and the downtown and North San Jose condo buildings are all a real drive apart, so we batch by area. Most weeks we can get to you within a few days, and we'll give you a window rather than a vague all-day promise. Condo and mid-rise work sometimes takes longer to book because buildings often require advance notice or a scheduled elevator and loading access.

Question 4

What usually turns out to be the actual problem?

Accepted Answer

In the 1970s and 80s two-story subdivisions in Almaden and Evergreen, and in newer construction generally, it's attic flex duct: crushed where someone stepped on it, sagging into long low spots, or pulled loose at a boot so the run is dumping conditioned air into the attic. In older ranches it's more often rusted or separated sheet metal, or under-slab runs that have silted up. Across all of them, the returns are the part that loads fastest, because they're pulling in freeway corridor soot, valley dust, and pollen all summer. A clogged return with an undersized or overdue filter explains a lot of complaints about weak airflow.

Question 5

What makes one San Jose job cost more than another?

Accepted Answer

Mostly system layout and the number of openings. A single-story ranch with one furnace and a modest run count is at the lighter end. The two-story Almaden and Evergreen homes often have two systems and more registers, which roughly doubles the work. Under-slab perimeter duct takes longer than attic duct because access is through floor registers and the runs are harder to reach. Downtown and North San Jose condos tend to be compact systems but can add time for building access rules. We look at the setup and tell you what it involves before we touch anything, so there are no surprises when we're done.

Air Duct Cleaning in San Jose, CA

Duct cleaning in San Jose, CA

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