1. Dust blowing out of the vents
If you see a puff of dust when the furnace or AC starts, or dark marks around the vent covers, dust has built up inside the ducts.
2. Dust comes back right after you clean
If furniture is dusty again a day or two after cleaning, the system may be recirculating dust from the ductwork.
3. Musty or stale smells
A musty smell when the system turns on can mean dust and moisture inside the ducts — common in humid areas and basements.
4. Weak airflow in some rooms
Buildup and debris can restrict airflow, leaving some rooms colder in winter or warmer in summer than others.
5. You’ve renovated
Renovation dust gets pulled into the return vents and settles in the ducts. A cleaning after renovations removes it — Brush Cleaning helps with stuck-on dust.
6. You moved into a new build
New homes often contain construction dust and debris. Many families in growing areas like Brampton, Surrey and Calgary are surprised how much comes out on the first cleaning.
7. You can’t remember the last cleaning
If you don’t know when the ducts were last cleaned — or you’ve just bought the home — it’s probably time. See how often you should clean your ducts.
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