Cleaning the air ducts in a San Jose home usually costs $300 to $700, and many homes land around $450. The size of the house and the number of supply and return vents set most of the price. How easy the ducts are to reach comes next: a low attic packed with insulation takes longer than a roomy crawlspace. And not every home needs a duct cleaning at all, which is worth settling before you pay for one.
Price by home size
| Job | Typical price |
|---|---|
| Whole-house cleaning, under 2,000 sq ft | $300–$450 |
| Whole-house cleaning, 2,000 to 3,000 sq ft | $400–$550 |
| Whole-house cleaning, over 3,000 sq ft | $500–$700 |
| Dryer vent cleaning, added to the visit | up to $150 |
| Sanitizing treatment, when there is a reason for it | up to $150 |
The bands overlap because vent count matters as much as floor area. A 1,900 sq ft house with a long hallway of registers can cost more than a 2,200 sq ft house with a compact layout. Larger Almaden Valley homes, some over 3,000 sq ft, usually sit in the top band, and a house with two furnaces has two duct systems to clean.
Duct cleaning or furnace cleaning?
People often search for “furnace duct cleaning” or a “furnace cleaning price” when they mean one of two different jobs:
- A furnace tune-up works on the furnace itself: burners, flame sensor, ignitor, blower, safety switches and the vent. It is priced as HVAC maintenance, not as duct cleaning.
- A duct cleaning cleans the ductwork that carries air to and from the rooms: the supply runs, the return runs, the registers and the grilles. It does not service the furnace.
A dusty smell in the first cold week is usually dust burning off the furnace after months of rest. It fades on its own or goes with a tune-up. Grey dust puffing from the registers, or furniture that needs wiping every other day, points toward the ducts and the filter instead.
Clean ducts also need a clean blower and coil. Dust packed on the blower wheel blows straight back into freshly cleaned ducts, so ask whether those parts are cleaned or at least checked.
What a real cleaning looks like
- A powerful vacuum holds the duct system under negative pressure while brushes or air whips loosen the dust, run by run, on both the supply and the return side.
- Registers and grilles come off and are cleaned.
- The return side gets the most attention, because it collects the most dust.
- In a typical house the job takes three to five hours.
- A camera shows you the inside of a few ducts before and after.
A whole-house offer for $99 rarely ends at $99. The usual pattern is a quick pass, then an expensive “you also need this” once the crew is inside. Ask for the full price and what it covers before anyone arrives.
What moves the price
Home size and vent count, as in the table. Access: ducts in a cramped attic, under a low floor or above finished ceilings take longer to reach. Contamination: drywall dust after a remodel, rodent nesting or heavy pet hair means more passes. Add-ons: the dryer vent and the sanitizing treatment are optional and priced on their own.
When cleaning is worth it, and when it is not
It is worth booking:
- after a remodel, when sanding dust went into open registers;
- after rodents or insects have been in the ducts;
- when there is mold growth in the ducts or on the coil, once the moisture source is fixed;
- when registers puff dust or the house gets dusty fast despite a good filter that is changed on time.
Some homes benefit from a cleaning every three to five years; many others do not need one on a schedule. If none of the signs above applies, an honest look may tell you to skip it.
Cleaning stops making sense when the ducts themselves are failing. It does not seal a leak or reconnect a run that has dropped loose in the attic. Old flex duct with a torn jacket or crumbling insulation can tear further under the brushes, and the money is better spent replacing it. That matters in Cambrian, where many homes are around 60 years old with leaky original ducts, and in Willow Glen, where vintage ductwork and thin insulation are common. Mold that returns after a cleaning usually means water: a clogged coil drain, or cold supply ducts sweating where their insulation is damaged.
Getting a firm price
Before the visit, it helps to know the square footage, roughly how many supply registers and return grilles the house has, where the ducts run (attic, crawlspace or both) and whether you want the dryer vent done. The technician confirms all of this on site and gives you the price before work begins, with no hidden fees. If the inspection shows the ducts need repair rather than cleaning, you hear that before you pay for a cleaning, and if they need replacing, the estimate for new ductwork is free. For the service itself, see air duct cleaning.
A note for San Jose homes
Long, dry summers keep fine dust in the air, and much of it ends up at the return grilles and the filter. Where the ducts run through the attic, a leak on the return side pulls hot, dusty attic air straight into the system, so a duct inspection sometimes finds a leak to fix before a cleaning is worth doing. If the real goal is cleaner air to breathe rather than cleaner ducts, compare air purification, read about poor air quality, and check your filter schedule first.