The industry standard recommendation — from organizations like NADCA (National Air Duct Cleaners Association) and Alberta Health Services — is to clean your furnace and ductwork every 2 to 3 years under normal conditions. But for many Calgary households, more frequent cleaning is the right call.
Standard Recommendation: Every 2–3 Years
For a typical household — adults only, no pets, no recent renovations, no known air quality issues — cleaning every 2–3 years strikes the right balance between cost and benefit. Your furnace filter handles day-to-day particulates; the duct cleaning addresses the deeper buildup that filters don't catch.
Clean More Frequently If You Have…
| Condition | Recommended Frequency |
|---|---|
| Pets (especially shedding breeds) | Every 1–2 years |
| Allergy or asthma sufferers in household | Every 1–2 years |
| Recent home renovation (drywall, flooring) | Clean after every major reno |
| New home purchase (unknown history) | Clean immediately |
| Smokers in the home | Every 1–2 years |
| Newborn or infant | Clean before arrival |
| History of flooding or moisture near ductwork | Inspect and clean promptly |
| Multiple pets | Annually |
Signs You Need a Cleaning Now (Regardless of Last Date)
These are indicators that you shouldn't wait for your scheduled interval:
- Visible dust puffing from registers when the furnace turns on
- Musty or dusty smell when the heat is running
- Noticeably more dust on furniture than usual
- Allergy symptoms worsening indoors despite regular cleaning
- Reduced airflow from certain vents
- You've just moved into the home and don't know the cleaning history
- You recently completed any renovation work
The Best Time of Year to Book in Calgary
Two windows work particularly well for Calgary homeowners:
Fall (September – October)
The best time for most households. Cleaning right before the heating season means you start winter with a fresh system. Demand is moderate in September, then picks up sharply in October — book early in the season to avoid delays.
Spring (April – May)
After a long heating season, spring gives you an opportunity to clean out the season's accumulation before shutting the furnace down for summer. Spring is also ideal if you're planning renovations, as you can clean after the work is done.
Summer tip: Summer is actually the easiest time to book with shortest wait times. If you missed the fall or spring window, summer appointments are readily available and you'll be ready well before the heating season begins.
What About the Furnace Filter?
The filter is not a substitute for duct cleaning — it's a complementary maintenance item. Standard 1" filters should be replaced every 1–3 months. High-MERV and media filters can go 6–12 months. Changing filters on schedule is the single most important routine maintenance step you can take between professional cleanings.
To book your cleaning or check whether your home is due, call (403) 299-0299 or book online.