AC Duct Cleaning in Toronto and the GTA

AC duct cleaning in a typical GTA home means cleaning the forced-air system your central air shares with the furnace: the supply and return ducts, the vents and the blower, done before the cooling season starts. Comfort Clean has cleaned these systems across Toronto and the GTA since 1980, with posted packages from $329.

We clean, and that includes the indoor AC coil, offered as a separate add-on. We do not repair or service air conditioners, handle refrigerant or clean ductless mini-splits, and we say so up front so you can call the right company for each job.

Your central air and your furnace share the same ducts

Most houses in Toronto and the GTA have a split central air system. The outdoor condenser sits beside the house and the indoor coil sits on top of the furnace. When the AC runs, the furnace blower pulls warm air back through the returns, pushes it across the cold coil and sends it out through the same supply ducts and vents that carry heat all winter.

So in most homes there is no separate set of AC ducts to clean. AC duct cleaning, air conditioner duct cleaning and furnace duct cleaning all describe one job: cleaning the forced-air system, the same work as our year-round air duct cleaning. The difference is the timing and what you notice, which in summer tends to be smell, dust and weak airflow.

Some homes are set up differently. Condo suites usually run on a fan coil (covered below), and some older Toronto houses heated by radiators have a separate air handler, often in the attic, just for the central air. Tell us what you have when you call and we will tell you straight whether it is something we clean.

The best time for AC duct cleaning is spring

Spring is the best time, after the furnace has finished its winter work and before the first hot, humid stretch. In the GTA that usually means April or May. The heating season leaves the most buildup in the system, and cleaning it before you switch over means the AC spends the summer pushing air through clean ducts and a clean blower.

Spring is also when the winter shows itself: a puff of dust from the vents the first day the AC runs, or a musty smell from the basement return as the humidity climbs. Booking early gets ahead of both.

You do not need to clean twice a year. One cleaning of the shared system covers both seasons, so ducts and a furnace cleaned last fall are ready for summer. For most homes the cycle is every three to five years, the range commonly cited from NADCA, the industry association, and sooner with pets, allergies or renovation dust.

Signs your AC ducts need cleaning

These are the signs we hear about most once the cooling season starts, and what each one usually means:

• Musty smell when the AC starts: moisture is involved. Dust in the ducts holds odours through a humid summer, and a dirty indoor coil can cause the same smell; we clean both, the coil as an add-on. A wet drain pan or a blocked condensate line is an HVAC service item, and we tell you if that looks like the source.
• Dust from the vents: a grey puff when the system kicks on, or a film on furniture near the registers a day after dusting, points to buildup in the supply runs or the blower.
• Weak airflow: cleaning helps when the cause is buildup, such as a caked blower wheel, a matted AC coil, a clogged return or debris in the runs. It will not fix an undersized system, a refrigerant problem or a crushed or disconnected duct, and a hot second floor is often a design issue rather than a dirty one.
• Debris you can see: hair, dust bunnies, construction dust or small toys sitting inside the registers.
• A smoky summer: wildfire smoke pulled into the house leaves a stale smell that the dust in the ducts holds onto.
• A recent renovation, new pets, or a home you just bought with no cleaning history.

When the cause is something we do not fix, our technicians point it out and photograph it so you can show a licensed HVAC technician.

What we clean before the cooling season

Our AC duct cleaning is the same full air system clean we run all year, timed for spring. Our technicians bring a truck-mounted negative-pressure vacuum and brushing tools, and what is covered depends on the package:

• Every package: the supply side, from the connection to the furnace supply through the supply main and the supply lines to every vent, the runs that carry cooled air to each room.
• Comfort and Luxury: the return side as well, from the return connection through the return main and return lines, which pull in the most dust, hair and lint. The J-channel is cleaned too.
• Luxury: the furnace blower compartment, because the same blower moves your cooled air all summer, plus sanitizing of the ductwork with a natural product (Benefect).
• Every package: before-and-after photos.

AC coil cleaning is not part of any package. The indoor coil sits right above the blower in the same air path, so many homeowners add AC coil cleaning to the same spring visit, priced by quote.

The furnace side of the same visit is explained on our furnace cleaning page. Because the furnace and the AC share one blower and one set of ducts, cleaning them together in spring sets up both seasons.

What we do not do: AC repair, refrigerant and mini-splits

We are a cleaning company, and we would rather you call the right people the first time. Comfort Clean does not:

• Service, repair or install air conditioners, or diagnose why one is not cooling
• Handle refrigerant, which is work for a licensed HVAC technician
• Repair or replace coils, fan motors or any other AC part
• Clean ductless mini-splits or wall-mounted heads, which have no ductwork and need a licensed HVAC technician
• Clear condensate drains or repair drain pans

Many searches for air conditioning cleaning are really about the equipment itself. A dirty indoor coil is something we clean, as a separate add-on priced by quote. A unit that will not cool, a refrigerant leak or a damaged coil is work for a licensed HVAC company. What we handle is cleaning everything the air travels through between the furnace and your rooms, the coil included when you add it.

When our technicians see something that looks wrong, such as a rusted coil pan, a disconnected duct or water where it should not be, they point it out and photograph it for your HVAC company. A spring AC tune-up from a licensed technician and a duct cleaning from us work well side by side; one does not replace the other.

What a filter can and cannot do

Your furnace filter works for the AC too, because cooled air passes through it on the way back to the blower. CMHC advises checking it monthly during the heating season, and we suggest keeping the same habit through the summer, when the AC keeps the blower running for long stretches.

A filter can:

• Catch much of the dust, hair and lint before it reaches the blower and the indoor coil
• Keep a freshly cleaned system cleaner for longer
• Warn you: a filter that clogs within a few weeks points to pets, renovation dust or a very dusty house

A filter cannot:

• Remove dust and debris already sitting in the ducts and the blower
• Clean the supply runs past the furnace, where settled dust gets blown into rooms
• Fix a moisture or odour problem
• Do its job once it is clogged, because a packed filter chokes airflow and makes the blower work harder

A denser filter is not automatically better. Some furnaces are not built for very restrictive filters, so check the furnace manual or ask your HVAC technician what rating yours can take.

Cleaning AC vents yourself

Plenty of people search for how to clean AC ducts in the house themselves. The surface work is worth doing every spring:

• Turn the system off at the thermostat first
• Lift off the supply registers and return grilles, wash them in warm soapy water and let them dry fully
• Vacuum inside each opening as far as the hose reaches
• Wipe the first few inches of duct you can reach with a damp cloth
• Change the furnace filter
• Keep furniture, rugs and curtains off floor registers and returns

Outside, keep the condenser clear: trim plants back, rake away leaves and the cottonwood fluff that piles up in early summer, rinse the fins gently with a garden hose (never a pressure washer), and do not store anything on top of it. Anything electrical or inside the unit is for your HVAC technician.

The part you cannot do yourself is the ductwork behind the walls and floors, and the blower inside the furnace. A household vacuum does not create the negative pressure needed to pull debris out of long runs, brushing without that suction just pushes the dust deeper, and the furnace cabinet has electrical and gas components that need care.

AC duct cleaning in condos with fan coils

Most condo suites in Toronto do not have a furnace or a branching duct system. They run on a fan coil unit, usually in a closet or above the ceiling, that handles both heating and cooling and feeds a few short supply runs. In a condo, AC duct cleaning means the fan coil area, the filter housing and those short runs. Most townhouses are different again: they have their own furnace and central air, so they are cleaned like a house, often with fewer vents.

We clean condo suites across the GTA and book access with your concierge or property manager. The details, including in-suite dryer vents, are on our condo duct cleaning page. Repairs to the fan coil itself, or anything on the building’s heating and cooling side, belong to the building’s HVAC contractor.

AC duct cleaning prices

AC duct cleaning uses the same posted packages as our year-round duct cleaning, because it is the same system:

• Basic, $329, up to 10 vents: the supply side, from the connection to the furnace supply through the supply lines and supply main line.
• Comfort, $399, up to 10 vents: the supply and return sides, with both furnace connections, the supply and return lines and mains, and the J-channel.
• Luxury, $499, up to 15 vents: the furnace blower compartment cleaned and the ductwork sanitized with a natural product (Benefect), on top of everything in Comfort.

Every package includes before-and-after photos. Extra vents are $12 each, there is no trip fee inside our service area, and we confirm your total by phone before we book. AC coil cleaning and dryer vent cleaning are not part of any package; both are priced separately and can be added to the same visit. The full breakdown is on our duct cleaning prices page.

Our office is at Bathurst and Finch in North York, just south of Steeles, so homes in Thornhill and Richmond Hill are a short drive away, and we cover the rest of Toronto and the GTA too. Call 905-738-1878 in early spring for the widest choice of dates, before the first heat wave.