Technician sealing a duct joint with mastic to stop air leaks

Same-day air duct service in Ontario, CA

Air Duct Servicesin Ontario, CA

In Ontario, what ends up inside your ductwork depends on where in California you live - wildfire smoke one season, valley dust the next, coastal damp after that. We clean the system from the main trunk out, inspect it on camera and seal the leaks that waste conditioned air.

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Air Duct Service Co — Ontario, CA

Every air duct service, one Ontario call

Cleaning, inspection, repair, installation, sealing and commercial work - the full air duct service list for Ontario, with free inspections and the same crew on every job. This page covers air duct in Ontario, CA end to end — the services, the local picture and the ZIP codes served.

Technician feeding an air whip into a floor vent in a home living room

Cleaning & Care Air Duct Cleaning

Our negative-air machine seals onto the main trunk duct and puts the whole system under suction first. Then each run is scrubbed individually, so years of dust and debris travel one way only — out of the ducts and into the machine. Around Ontario, a cleaning after smoke season clears what the returns collected while the skies were gray. Air Duct Cleaning in Ontario, CA starts with a real look at the problem — never a guess over the phone.

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Technician inspecting a ceiling return vent with a flashlight inside a home

Cleaning & Care Air Duct Inspection

In San Bernardino County, an inspection after smoke season shows how much residue the system stored. A camera goes inside your ductwork so you can see exactly what's in there — buildup, damage or blockages — before we recommend anything. Inspections are free. Air Duct Inspection in Ontario, CA is one call away, every day of the week.

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Technician joining a duct section back together in a home attic

Repair Air Duct Repair

Crushed, torn or disconnected ducts leak the air you pay to heat and cool. In Ontario, the repair list often starts overhead: heat-dried joints, shifted takeoffs and brittle flex runs in the attic. We repair and rebuild damaged sections so airflow is strong and even again. For air duct repair in Ontario, CA, one call books the visit and a local tech takes it from there.

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Technician connecting a new flex duct to the furnace inside a home

Install & Replace Air Duct Installation

New duct runs for additions, remodels and system upgrades — sized, sealed and balanced so every room gets its share of heating and cooling. Air Duct Installation in Ontario, CA starts with a real look at the problem — never a guess over the phone.

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Technician brushing mastic sealant onto a duct joint in a home attic

Repair Air Duct Sealing

Leaky joints quietly waste a big share of your airflow. We seal seams and connections with professional mastic for a tighter, more efficient system. In San Bernardino County, a sealed system also keeps smoke-season air where it belongs - inside, filtered, instead of leaking at every joint. It is why air duct sealing in Ontario, CA keeps getting recommended to neighbors.

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Two technicians cleaning the ductwork in a home with a professional duct machine

Cleaning & Care Commercial Air Duct Cleaning

Offices, restaurants, retail and multi-unit buildings across Ontario — scheduled commercial duct cleaning with the same negative-air machine sealed onto the trunk, keeping your space comfortable, compliant and breathing clean. Around Ontario, multi-unit buildings get a unit-by-unit plan, with each system cleaned from its own trunk. Booking commercial air duct cleaning in Ontario, CA takes one call, and the tech arrives with everything the job needs.

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Need something else — a damper, a blower, a smoke problem, a bird in the flue? We cover all 27 air duct specialties. Call (888) 258-5005 and describe it.

Local conditions

Ontario ducts have Ontario problems

A duct system in Ontario may face wildfire smoke, valley heat, coastal moisture or all three across the year. This is what we actually find here, and what we check on every visit.

The smell that outlasts the smoke

Owners across San Bernardino County notice it every year: weeks after a smoke event, the AC or heat still carries a faint campfire note at startup. That is smoke residue stored in duct dust, releasing a little with every cycle. Cleaning the reservoir is what ends it.

Inland heat bakes attic systems

Inland Ontario summers push attics to extremes, and the ductwork living there ages fast - tape dries, flex jackets get brittle, joints separate. Cooled air leaks overhead while the system runs long afternoons, and sealing is usually where the fix starts.

Coastal damp in the ductwork

Closer to the coast, the pattern flips: mild temperatures, marine-layer moisture and systems that sit idle for stretches. Dust inside those ducts sits in damp air, musty startup smells are common, and returns near the floor collect a heavier, damper load.

Pollen nearly all year

With something blooming in California in almost every month, pollen is not a season here so much as a rotation - trees, grasses, weeds in turn. Return ducts collect each wave, and allergy households feel the stored load most when the house is sealed tight.

Ontario sits in San Bernardino County, and the ZIP list at the bottom of this page covers 5 serviceable ZIP codes — 91710 through 91764. The closest served neighbors are Montclair, Chino, Upland, and every one of them is covered by the same crews, the same day, under the same number: (888) 258-5005.

Cold air duct? Warm answer.

Same-day service, free estimates, licensed & insured — and a air duct that lights when you click the remote.

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Questions

Asked the way Ontario asks

How often should ducts be cleaned in California?

Every few years for most Ontario homes - sooner after a heavy smoke season, a remodel, or in allergy households. Coastal and inland systems age differently, so we camera-inspect free and show you your own trunk; the right interval comes from what is actually in there.

Why does one room never cool like the rest?

Usually the run serving it: a separated attic joint, a kinked flex run, or a conversion room tied into an undersized trunk. In Ontario we trace the run on the inspection camera, and repair, sealing or a properly sized new run fixes it at the cause.

What are the signs my ducts are leaking?

Rooms that lag the thermostat, long AC cycles on ordinary days, dust returning soon after cleaning and weak airflow at distant registers. In attic systems across Ontario, heat-dried tape and shifted joints are the standing culprits, and mastic sealing is the lasting fix.

Do you clean ducts in commercial buildings here?

Yes - offices, restaurants, retail, medical suites and multi-unit buildings across Ontario, scheduled around your hours. Commercial systems get the same method: the negative-air machine sealed onto the trunk, every run cleaned individually, and a camera record of condition.

Will sealing ducts help my energy use?

In inland Ontario homes with attic systems, leaks spill cooled air into a hot attic on every cycle, and sealing them means the equipment runs less to hold temperature. We leak-check on every inspection and tell you plainly which work would actually pay off.

Do you give prices over the phone?

No — and be wary of anyone who does. Every duct system is a different size and condition, so a phone price is a guess that changes at your door. Our inspections and estimates are free: a tech looks inside your actual ductwork first, then gives you one clear price before any work starts.

Where we work

Ontario, CA ZIP codes we serve

Air Duct Service Co is a national company with local technicians serving Ontario street addresses across the ZIP codes below — same-day service and free estimates, every day 8 AM – 8 PM. More of California is covered from our California page. The Ontario list below covers 5 ZIP codes, 91710 through 91764.

91710 91758 91761 91762 91764

Don't see your ZIP? Ontario also uses P.O. Box and single-organization ZIP codes that have no street addresses — call (888) 258-5005 and we will confirm coverage for your street address on the call.

Also serving nearby: Montclair, CA · Chino, CA · Upland, CA · Claremont, CA · Chino Hills, CA · Pomona, CA.