Allergies, recent remodel dust, post-fire residue, pets, or just years of accumulated buildup. Your duct network is the silent middleman pulling all of it into every room. Onzone runs NADCA-protocol duct cleaning across the Bay Area.
Truck-mount HEPA equipment. Every supply and return cleaned. Optional EPA-registered antimicrobial sanitization. Before and after photos at the end of the job.
Dust collects around vents after cleaning because duct interiors, boots, or return cavities are loaded with loose debris.
Drywall dust, sawdust, and insulation fragments can remain in duct runs after remodel work or attic service.
Odors at startup may come from dirty returns, dust-coated blower compartments, or debris holding moisture inside ductwork.
We document accessible duct conditions with before and after photos so you can see what was removed.
Dust, allergens, pet dander, and microbial growth get pulled out of the system — not recirculated back into the rooms you breathe in.
Buildup chokes airflow and forces your system to run longer to hit setpoint. Clean ducts mean lower energy bills and less wear on the equipment.
Especially helpful in homes with allergies, asthma, recent remodels, post-fire smoke residue, or after years of accumulated buildup.
NADCA recommends every 3–5 years for typical homes. Sooner if you’ve had a remodel, pets, smokers, post-fire smoke, recent rodent infestation, or anyone with allergies or asthma.
Most single-family homes take 3–5 hours. Larger homes or commercial buildings are quoted by scope. The system stays off while we work, but you can stay in the building.
Yes. We use truck-mounted negative-pressure equipment with HEPA filtration — the NADCA standard. Portable consumer-grade machines can’t pull the static pressure needed to actually clean the trunk lines.
