Ductwork is easy to forget about because it’s hidden inside your walls and floors — but it carries every bit of air your HVAC system moves through your home, several times a day. Here’s how to tell when it’s overdue for a cleaning.
1. Visible dust around vents
A thin layer of dust is normal. Heavy buildup that returns quickly after cleaning usually means the ductwork itself is distributing it.
2. Musty or stale odour when the system runs
This often points to dust, debris, or (in humid conditions) mold buildup inside the duct system rather than anywhere else in the home.
3. Some rooms never feel quite right
Persistent temperature imbalance between rooms, even after a tune-up, can point to duct leaks or blockages rather than an equipment problem.
4. Recent renovation work
Drywall dust and construction debris frequently find their way into open ductwork during a renovation — worth a cleaning once the dust has settled, literally.
5. Visible mold or pest activity near vents
Both are reasons for prompt professional cleaning and inspection — pests can also damage ductwork and insulation over time.
6. It’s simply been more than 5 years
Even without obvious symptoms, a duct system is generally recommended for cleaning every 3-5 years as routine maintenance, more often for households with pets or allergy concerns.
Not sure whether your ducts need attention? Book an inspection and we’ll give you a straight answer.