Clean vent register grille on the wall of a home

Same-day air duct service in Longmont, CO

Air Duct Servicesin Longmont, CO

Longmont homes heat hard through winter and cool through dry summers, and their duct systems run through basements, crawlspaces and attics that swing widely in temperature. Our negative-air machine seals onto the main trunk and puts the whole system under suction first, then every run is scrubbed individually.

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Air Duct Service Co — Longmont, CO

Every air duct service, one Longmont call

The six services Longmont homeowners call us for most - from clearing a trunk after smoke season to finishing ductwork in a fast-growing subdivision. Everything on this page is air duct in Longmont, CO — the work, the local conditions and the coverage.

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. In Boulder County, basement trunks carry the heaviest load, and the camera checks the trunk first and last. Air Duct Cleaning in Longmont, CO 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

The camera reads boxed-in soffit runs, so finished-basement ducts get checked without opening the ceiling. 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. The crews behind air duct inspection in Longmont, CO are the same ones who cover the ZIP codes listed below.

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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 Boulder County, the cold room over the garage is usually a duct problem, and the repair follows the run until airflow balances. We repair and rebuild damaged sections so airflow is strong and even again. That local standard is what air duct repair in Longmont, CO means with Air Duct Service Co.

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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. Around Longmont, new runs are sealed and balanced with the existing system, not just tied into the nearest trunk opening. The crews behind air duct installation in Longmont, CO are the same ones who cover the ZIP codes listed below.

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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. Around Longmont, we replace failed tape with professional mastic at trunk seams, takeoffs and plenum connections. Air Duct Sealing in Longmont, CO is one call away, every day of the week.

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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 Longmont — scheduled commercial duct cleaning with the same negative-air machine sealed onto the trunk, keeping your space comfortable, compliant and breathing clean. Hospitality and rental properties across Colorado often book between seasons, clearing the system at turnover. For commercial air duct cleaning in Longmont, CO, one call books the visit and a local tech takes it from there.

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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

Longmont ducts have Longmont problems

A duct system in Longmont heats through a long winter at altitude, breathes dry dust and summer smoke, and often serves a home still settling into new construction. This is what we actually find here, and what we check on every visit.

Smoke summers settle indoors

Wildfire smoke reaches Longmont most summers now, whether the fire is in-state or states away. The finest particles penetrate closed homes and settle into duct dust, and the system keeps recirculating that residue - and a faint smoke note at startup - until the trunk and returns are cleaned out.

Long heating seasons at altitude

Furnaces in Boulder County run a long season, and at altitude they move a lot of air to do it. Every heating hour delivers the duct load again, and by late winter the returns of a busy home carry a visible mat of dust, hair and lint.

Temperature swings work the joints

Mountain weather swings hard - cold nights, sunny afternoons, shoulder seasons that flip daily. Ductwork in attics and crawlspaces expands and contracts through it all, joints loosen and tape ages early, so mountain systems earn leak checks more often than their age suggests.

The cold room over the garage

Bonus rooms and bedrooms over garages are the standing comfort complaint in Longmont winters. The run serving them travels far through cold space, losing heated air at every loose joint - a duct repair and sealing problem, solved at the run rather than with a bigger furnace.

Longmont sits in Boulder County, and the ZIP list at the bottom of this page covers 3 serviceable ZIP codes — 80501 through 80504. The closest served neighbors are Mead, Frederick, Firestone, 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 Longmont asks

How often should ducts be cleaned in the mountains?

Every few years for most Longmont homes - sooner after a heavy smoke summer, a basement finish, or in new subdivisions still surrounded by construction. We camera-inspect free and show you the inside of your own trunk, so the timing comes from what is actually in there.

How do you clean the ducts - what is the process?

Our negative-air machine seals onto the main trunk duct and puts the whole system under suction first. Then each individual run is scrubbed on its own, so loosened dust travels toward the trunk and into the machine - never back into your rooms. We finish at the registers and show you the before-and-after on camera.

We just finished our basement - should the ducts be checked?

Yes. Finishing loads the system with drywall dust, and the boxed-in runs hide leaks afterward. We camera the trunk and soffit runs, clean what the project left behind, and check the joints the remodel disturbed - a common first-year call in Longmont.

Is duct cleaning worth it in a brand-new home?

In the fast-growing areas around Longmont, often yes: systems run during construction and drywall dust packs into new ductwork before move-in, with raw-lot dust following. The free inspection camera settles it in minutes - clean trunk, honest answer, no work sold.

Do you clean ducts in commercial buildings here?

Yes - offices, restaurants, retail, schools, ski-area and multi-unit buildings across Longmont, 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.

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

Longmont, CO ZIP codes we serve

Air Duct Service Co is a national company with local technicians serving Longmont street addresses across the ZIP codes below — same-day service and free estimates, every day 8 AM – 8 PM. More of Colorado is covered from our Colorado page. The Longmont list below covers 3 ZIP codes, 80501 through 80504.

80501 80503 80504

Don't see your ZIP? Longmont 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: Mead, CO · Frederick, CO · Firestone, CO · Erie, CO · Dacono, CO · Berthoud, CO.