Air Duct Cleaning in Sunnyvale, CA

Frequently Asked Questions

1. My house is a 1950s single-story ranch on a slab. Where do the ducts actually run?

   In most of Sunnyvale's postwar tracts, the supply ducts are sheet metal running through the attic and dropping into ceiling registers, with the furnace feeding off one wide hallway return. There's nothing under the floor because the house sits on a slab. That layout is straightforward to clean, but it means we're working from the attic in a lot of these homes, and we need access to the hallway return grille and every ceiling register. If your registers are still the original stamped metal ones from the build, we'll pull them, clean them, and put them back. They're usually fine, just painted over a few times.

2. There's been a teardown going up two doors down for months. Is it worth cleaning now or waiting until it's finished?

   Honest answer: if the framing is done and they're past drywall and sanding, you've already taken most of the dust you're going to take. Construction fines are what travels. They come in through open windows and get pulled straight into that big hallway return. If the lot next door is still at demolition or early framing, and you're not having air quality problems right now, waiting until they've closed the house in will get you more out of the cleaning. Same applies if you're building an ADU in your own backyard. Clean after, not during.

3. What usually goes wrong with the ducts in Sunnyvale homes?

   Two different problems depending on the building. In the older ranches, it's the attic sheet metal: joints separating over sixty-plus years, so conditioned air leaks into the attic and attic dust gets drawn back in. In the 1970s and 80s apartments and condos with closet furnaces, it's flex duct. Crushed where someone stored boxes in the attic or against it, kinked at the takeoffs, or the inner liner torn and sagging. We'll tell you what we find and show you photos. Cleaning doesn't fix torn flex or an open joint, and we won't pretend it does.

4. How soon can someone come out, and do you ever do same-day?

   Most Sunnyvale jobs get scheduled within a few days. Same-day happens when we have a cancellation or when your address lines up with a route we're already running on the flats, so it's worth calling and asking rather than assuming. Spring is our busiest stretch here. Once tree and grass pollen is heavy across the residential grid, the phone volume goes up and lead times stretch. If you know you want it done before allergy season, booking in late winter gets you a better pick of dates.

5. What makes one Sunnyvale house cost more than another?

   Mostly register count and access. A compact single-story ranch with one return and a modest number of ceiling supplies is on the simpler end. Cost moves up with added square footage from a remodel or second-story addition, with extra returns, and with attic conditions that make the runs hard to reach. Condo and apartment units with a closet furnace are usually smaller jobs, though a tight closet can slow things down. Heavy construction dust loading from a nearby rebuild, or long-term valley silt buildup in a system that's never been cleaned, adds time as well. We'd rather look at your actual setup than guess from square footage over the phone.