Frequently Asked Questions - Air Duct Cleaning in Castro Valley, CA
These are the questions we hear most often from homeowners across Castro Valley, Cherryland, and Fairview. If yours isn't here, call (855) 382-9257 and ask us directly.
Pricing & Cost FAQs
In Castro Valley, whole-system air duct cleaning typically runs between $350 and $700 for a single-family home, with larger two-story houses in neighborhoods like the Castro Valley hills sometimes reaching $900. The price is set per job by a written estimate, never per vent. We give you one flat price for the entire system before any work starts, so you know the full number going in. Call (855) 382-9257 for a free estimate.
A very low quote usually means the company is pricing per vent and will add more vents, returns, and fees once they arrive. Whole-system pricing isn't itemized that way. Some low offers also skip the return side of the system or don't touch the main trunk line. In Castro Valley homes built from the 1960s through the 1990s, the return ducts carry as much dust as the supply side, so skipping them saves labor but leaves the job half done. Always ask whether the price covers the full system.
The estimate is free. We walk through your home, look at the furnace, the return registers, and the supply runs, then give you a written price for the whole system. There is no service-call fee, no diagnostic fee, and no charge to have us come out. The number on that written estimate is the number you pay, agreed before we start.
Three things move the price: the square footage of the home, the number of supply and return registers, and how much debris is actually sitting in the ducts. Homes near the eastern hills of Castro Valley see fine dust and pollen that packs into the trunk line and can require more time. The age of the system matters too: older ductwork with more bends takes longer to clean properly. We factor all of this into the written estimate so there are no surprises.
No. Our price is for the complete system: supply vents, return registers, the main trunk line, and the branch runs. We do not charge per vent or add a separate fee for the return side. This is the biggest difference between how we price and how a bait-and-switch operator prices a job in Castro Valley. You get one number, and it covers everything.
Service & Process FAQs
We start by covering the registers and connecting a high-powered vacuum to the main trunk line, usually at the furnace. Then we run rotary brushes through the supply and return ducts to break loose the dust, pet hair, and debris that has built up. The vacuum pulls it all out as we go. After the ducts are clean, we show you before-and-after photos of your own system so you can see exactly what came out. The whole visit usually takes two to four hours for a typical Castro Valley home.
Most single-family homes in Castro Valley take between two and four hours, depending on the size of the system and how much buildup is in the ducts. A small single-story house in Ashland or Cherryland often goes faster, while a larger two-story home with multiple returns near the hills can take the full afternoon. We'll give you a realistic time window when we write the estimate.
Yes, and this is the most common reason people call us. The dry summers in Castro Valley kick up fine dust that gets pulled into the return side of the HVAC system and recirculated through the supply registers. Once the ducts are clean, that loop stops repeating. You should also change your furnace filter at the same time, which we can walk you through. Dust that settles from open windows is a separate source, but clean ducts remove one of the bigger contributors.
We clean air ducts, and many Castro Valley customers ask about dryer vents at the same time. Ask when you call (855) 382-9257 and we'll tell you what is included in the estimate for your home. Dryer vent cleaning is a separate service in our scope, and we're glad to point you in the right direction or include it if it's part of the job we quote.
After. Drywall dust, sawdust, and construction debris get pulled into the return ducts during any remodel, and that fine dust will keep blowing through the house long after the project ends. In Castro Valley, where a lot of homes from the 1970s and 1980s are being updated, we recommend scheduling duct cleaning once the contractors are finished and the dust has settled. Cleaning before a remodel just means doing it twice.
Every three to five years is the honest answer for most Castro Valley homes. You can stretch that if you change filters regularly and don't have pets, or shorten it if you have two dogs, a dusty hillside lot, or someone in the house with allergies. The dry inland climate here means dust moves through the system year-round, so if you can't remember the last time the ducts were cleaned, it's probably time.
Brands & Parts FAQs
We use professional rotary brush and negative-air systems from brands like Rotobrush and Nikro. These aren't the small shop vacs you can rent; they're truck-mounted or high-powered portable units that pull a strong vacuum through the full trunk line while the brush agitates the inside of the duct. The combination is what actually removes packed dust rather than just loosening the top layer.
Yes. We use HEPA filtration on the vacuum side, which is what keeps the dust from blowing back into your Castro Valley living room while the system is being cleaned. Brands like Honeywell and Guardsman make the filter media we rely on. The filter is changed or cleaned between jobs, and the vacuum pulls outside or through a sealed canister so the dust you're trying to remove doesn't re-enter the house.
Some are, but the equipment matters less than the person running it. A homeowner can rent a machine or buy a rotary brush kit, but without knowing how to seal the system, set the negative pressure, and work the returns as well as the supply side, the result is usually a partial clean. We train on Rotobrush and Nikro systems specifically for residential ductwork like the homes you find all over Castro Valley.
Licensing & Insurance FAQs
Every pro working under our name is required to hold the license and insurance the state of California requires for this work. We carry the coverage a Castro Valley homeowner should expect from any contractor entering their home. If you want to see documentation before we start, ask the office and we'll provide it. Never let anyone work in your ducts without at least basic proof of insurance.
We require screening for every technician who works under our name, and we hold them to the standard our customers in Castro Valley expect when someone is entering their home. Our team treats your house the way we'd want ours treated: shoe covers, drop cloths around the furnace, and a thorough walk-through before and after the job. You deserve to feel comfortable with who is in your home.
A live coordinator answers. They take your details, answer pricing and scheduling questions, and connect you with the local team that will do the work. We answer 24/7, so even if you call at a strange hour, you won't get a voicemail. The coordinator books you into the next opening. Fast dispatch from 7am to 7pm, Sunday through Friday.
Same-Day Service & Response FAQs
Same-day service is often available Sunday through Friday between 7am and 7pm. The earlier you call, the easier it is to fit you in, but we'll do our best to get a crew to your home the same day if that's what you need. Call (855) 382-9257 and the coordinator will check the schedule in real time. We answer 24/7. Fast dispatch from 7am to 7pm.
We answer 24/7. A call outside dispatch hours is booked into the next opening, Sunday through Friday, 7am to 7pm. If you call at 9pm on a Wednesday, a live coordinator takes your information and gets you scheduled. You won't get a machine. On Saturdays, we are closed; if your ducts can wait until Sunday, that's the next opening and we'll book you in.
We are closed on Saturday. Our dispatch hours are Sunday through Friday, 7am to 7pm, and that's the schedule we've kept in Castro Valley for years. If your ducts start blowing dust on a Saturday, call (855) 382-9257 and we'll book you for Sunday. The phone is answered 24/7, so you'll reach a live coordinator no matter when you call.
Warranty & Guarantees FAQs
Yes. We stand behind the work with a satisfaction guarantee: if you're not happy with the result, tell us and we'll make it right. For most Castro Valley homes, that means re-cleaning the affected runs or addressing whatever was missed at no charge. The whole point of the before-and-after photos is that you can see the work was actually done, not just promised. We want you to feel confident in what you paid for.
You'll see it. We take before-and-after photos of your own ducts, from the inside, so you can compare the trunk line and registers before we start and after we finish. You can also check the registers with a damp paper towel a day later: it should stay clean. If dust is still blowing out a week after we leave, call us and we'll come back. That's what the satisfaction guarantee is for.
Written by the team at Duct Cleaning Castro Valley, serving Castro Valley since 2012.