Last updated: October 2026
Air duct cleaning and disinfecting in Calgary
Dust, pet dander, pollen and renovation debris settle inside the ductwork, and the blower puts them back into the rooms every time it runs. We clean the whole system — supply and return — fog it with a disinfectant, and show you the before and after.
- Free in-home assessment, no obligation
- Written price before work begins
- Two-hour arrival window confirmed before the visit
- AIC employees, not subcontractors
Everything you need to know about your air ducts
Calgary has good outdoor air. Indoors is a different question.
Calgarians get clean outdoor air from sitting next to the Rockies. Indoors is not automatic. Construction silica, forest fire smoke and everyday household dust all end up inside the house, and once they are inside they go where the air goes.
Dust, dead skin, pet dander and pollen get pulled into the return side of your HVAC system. Some of it is caught by the filter. The rest settles in the ductwork and is picked back up whenever the blower starts. Cleaning the ducts takes that reservoir out of the system.
What collects in your ductwork
You do not see the inside of a duct, so there is nothing to prompt you to deal with it. What we find on inspection is usually some combination of:
- Household dust and dead skin, heaviest in the return runs where air moves slowest
- Pet hair and dander
- Pollen and outdoor dust tracked in or drawn in through the return
- Drywall dust and sawdust after a renovation, and construction debris in newer homes
- Mould where there has been moisture in or around the duct
- Lint and general debris fallen through floor registers
- Stale odours held in the settled dust
Cleaning removes what has settled in the ductwork. We do not claim it diagnoses or treats any medical condition — if someone in the house is unwell, that is a conversation for their doctor.
How we clean your ducts
Inspection
Before anything starts we inspect the ductwork for dirt buildup, mould and debris. That sets the approach, and it lets us show you the state of your ducts before we touch them.
High-powered vacuuming
Industrial vacuum equipment connects directly to your HVAC system and puts the ductwork under negative pressure, so the debris is pulled into our containment rather than into the room. Our Hypervac portable equipment means no diesel truck idling in the driveway and no giant hose holding your door open.
Agitation with scorpion whips
Debris that is stuck to the duct wall will not lift with suction alone. Scorpion whips break it loose inside the duct so the vacuum can carry it out.
Disinfecting
We fog the cleaned ductwork with Benefect. Details are in the next section.
Final inspection and photos
We inspect again once the work is done, and you get before-and-after photos so you can see what changed rather than take our word for it.
Ductwork integrity review
Leaking ducts cause hot and cold rooms and let dust into the system. Since we are already inside your ductwork, we tell you what we found about air loss and what it would take to fix it. No obligation attached.
Disinfecting the system after it is clean
Removing the dust and debris is the physical half of the job. Once the ductwork is clean we fog it with Benefect, a plant-based disinfectant, so the surfaces are treated and not just cleared.
Clean, disinfect, sterilize — they are not the same word
- Clean — physically remove the dust, dirt and debris so nothing visible or blocking is left in the duct.
- Disinfect — fog the cleaned surfaces with Benefect to treat what cleaning alone leaves behind.
- Sterilize — the standard for medical and critical environments, not normally used on home duct surfaces. For treating the air stream itself we install UVC air treatment, available on request.
How your home’s duct system works
Residential ductwork distributes conditioned air through the house and brings it back again. It has two halves.
Supply ducts carry warm or cool air from the furnace or air handler out to the rooms, through vents usually set in floors or ceilings.
Return ducts pull air back out of the rooms, normally through larger grilles in hallways and common areas, and send it back to the furnace to be filtered and heated or cooled again.
The two sides have to stay balanced for the system to move air properly. When either side is loaded with dust, airflow drops. The return side collects the most, because it runs at lower pressure and lower air velocity, so what is carried in it has time to settle out.
We clean the whole system, not part of it
Professional cleaning uses equipment that reaches deep into the ductwork — vacuums connected to the system and whips that agitate the buildup. A shop vacuum or a brush at the register reaches the first few feet of a branch and leaves the rest.
What we clean
The main supply trunks. The branch and distribution ducts. The take-offs, the boots and the grilles. Then the same again on the return side, including the return grilles and the return plenum.
What a partial job leaves
We have seen return ductwork skipped entirely, main supply trunks missed, and jobs where the equipment ran and nothing was cleaned at all. Half a system cleaned is dust left in the house, paid for in full.
Ask our duct service technician to show you the live camera view of your system while the work is happening. They will show you the before and after footage on the spot. If you are pricing this against another quote, ask the other company the same question: does the price include the return side and the plenum, and will you be shown the result.
Hot and cold rooms are usually a leak, not dirt
Cleaning improves airflow through a loaded system. It does not close a gap. If one room never gets warm while another overheats, the more likely cause is conditioned air escaping through joints and seams before it reaches the register.
For that we use Aeroseal, which seals the leaks from inside the ductwork rather than opening walls and ceilings to get at them. If we find significant air loss during your cleaning, we will tell you and you can decide separately.
Clothes dryer vents need cleaning every year
Lint builds up in the dryer vent and restricts the airflow the dryer depends on. That is a safety issue as much as an efficiency one. These are the signs to act on:
- Lint piling up behind the dryer — the vent is not carrying the air out, or the exhaust hose has come loose.
- Loads taking longer to dry — restricted airflow makes the dryer run longer for the same result.
- The dryer overheating and shutting itself off — the overheat cut-out is doing its job. Do not keep restarting it; get the vent cleared.
- Little lint, or wet lint, on the screen — poor airflow through the vent system, and clothes that do not finish drying.
- More lint on your clothes than usual after a cycle.
- Lint collecting around the door seal — lint is backing up out of the vent.
- Dryer and clothes hotter than normal at the end of a cycle.
Book a whole-home duct clean and disinfect
The in-home assessment is free and there is no obligation. You get the price in writing before any work starts, and a two-hour arrival window confirmed before the visit.
Common myths about duct cleaning
Myth: cleaning fixes any airflow problem
It removes dust and debris, which is one cause of restricted airflow. It does not fix undersized ductwork, a crushed or disconnected run, or leaking joints. Those need repair or sealing, and we will tell you which one you are looking at.
Myth: your home will be dust-free afterwards
It reduces what the system is recirculating. Dust still arrives from doors, windows, clothing and daily life, so filter changes and ordinary cleaning still matter.
Myth: it only needs doing once
Dust accumulates again from the day the work is finished. Most homes are due again in three to five years, sooner with pets or after a renovation.
Myth: every duct cleaning company does the same work
They do not. The difference is how much of the system is actually cleaned, and whether you are shown the result. Ask any company what is included and whether the return side and the plenum are part of it.
Myth: duct cleaning solves a mould problem
It removes the mould that is in the ductwork. If moisture is what caused it, the moisture has to be dealt with too or it comes back.
Myth: it is a do-it-yourself job
A household vacuum reaches the first stretch of a branch duct. The trunks, take-offs, boots and the return plenum need a vacuum connected to the system, negative pressure to keep the debris contained, and a whip to break the buildup loose.
Myth: you never find out what it will cost until the end
Not here. The in-home assessment is free with no obligation, and you get the price in writing before work begins. Payment plans are on the payment plans page.
Duct cleaning questions
How often should I clean my ducts?
Most homes are well served by a cleaning every three to five years. Every one to two years is more realistic if you have pets. Clean them after a renovation regardless of when the last one was — drywall dust gets everywhere and stays there.
How often should the ducts be disinfected?
Cleaning every three to five years removes the physical debris. Disinfecting treats the surfaces, so we recommend it yearly, and after any renovation or water damage.
What are the signs my ducts need cleaning?
Dust building up around the vents faster than you can wipe it, a stale smell when the system starts, visible debris in the register when you look down it, or visible mould inside the ductwork.
How long does it take?
Usually one to three hours, depending on the size of the home and how complex the duct system is.
Is it noisy?
There is noise from the vacuum and the rotating brushes for the few hours the work takes. Our equipment is portable and runs inside the house, so there is no diesel truck at the curb and your doors stay shut while we work.
Is duct cleaning necessary in a new home?
Yes. Construction dust and drywall debris are in the ducts of most new builds from the day the system is first run.
I just bought a house. Do I need this?
We would clean and disinfect. Surfaces get cleaned before a sale; the duct system almost never does, and you have no way of knowing what was in the house before you.
Will cleaning my ducts get rid of a smell in the house?
Often, if the smell is being held in dust and debris inside the system and redistributed when the blower runs. If the smell is still there after the ducts are clean, the source is somewhere else and we should look for it rather than keep treating the ducts.
Will it make my furnace run better?
A blocked return and a dust-loaded system make the blower work harder to move the same air, and cleaning removes that restriction. We will not put a dollar figure on the saving — it depends on your system and how dirty it was, and anyone quoting you a percentage is guessing.
Will duct cleaning fix a room that is always cold?
It can help if the run was restricted by debris. If the temperature difference stays after cleaning, the cause is usually air escaping through leaks in the ductwork, and that is a sealing job rather than a cleaning one. See duct sealing.
What is duct fogging?
Fogging disperses a disinfectant — we use Benefect — through the duct system so it reaches the surfaces the vacuum and whip have already cleaned.
Is duct cleaning safe for my HVAC system?
Yes, done with the right tools by people who know where the fragile parts are. The risk with duct cleaning is damage from the wrong equipment in the wrong hands, not from the cleaning itself.
Is there anything to do afterwards?
Change your filters on schedule, keep supply and return vents clear of furniture and rugs, and book the ducts again after any major renovation.
Do you offer a guarantee?
Yes. Our guarantees are published in full at our guarantees.
Have a question?
Tell us what the house is doing and we will route it to the right technician. For no heat, no cooling or water escaping, call (587) 792-1456 instead. After hours? Call and we’ll give you the next available time.
Book your duct cleaning and disinfecting
Whole-home duct cleaning across Calgary and area. Free in-home assessment, written price before work begins, and before-and-after photos of your own ductwork.
Related: duct sealing · indoor air quality · payment plans