How long does a full duct cleaning take for a typical Toronto home?

A thorough, professional duct cleaning takes 3 to 5 hours for a typical GTA home with 10 to 20 supply and return registers. If a company tells you they can clean your entire duct system in an hour or less, that is a strong indication they are not performing a legitimate source-removal cleaning — they are likely just inserting a vacuum hose into a few registers and calling it done.

The time required depends on several factors specific to your home. The number of registers is the biggest variable — each supply and return register needs to be individually cleaned, with agitation tools inserted into the branch duct to dislodge debris while the truck-mounted vacuum maintains negative pressure on the entire system. A small Toronto condo or townhouse with 8 to 10 registers might take 2 to 3 hours, while a large detached home in Vaughan, Markham, or Oakville with 25 or more registers and a multi-zone system can take 5 to 6 hours. The layout of the ductwork also matters — a simple single-storey home with all ducts accessible in an unfinished basement is faster to clean than a two-storey home with ducts running through finished ceilings, walls, and an attic.

The condition of the ducts significantly affects timing as well. A system that has been cleaned within the last 5 years and is in good condition goes faster than a system that has never been cleaned in a 40-year-old Scarborough bungalow. Post-renovation cleaning takes longer because drywall dust, sawdust, and construction debris require more aggressive agitation to remove. If the technician discovers mould, rodent contamination, or severely damaged duct sections, the job may take longer as they document the findings and discuss additional remediation options.

A standard cleaning appointment with a two-person crew follows a predictable sequence. The crew spends the first 15 to 30 minutes setting up — connecting the truck-mounted vacuum to the main trunk line, inspecting the system, and protecting your flooring and furniture. The next 2 to 4 hours are spent working through each register individually with agitation tools. The final 30 to 45 minutes cover cleaning the blower compartment, replacing access panels, reinstalling registers, and walking you through the before-and-after results.

Plan for the crew to need access to every room in your home where there is a supply or return register. Move furniture away from registers before they arrive to save time and avoid delays. Someone needs to be home for the duration, and keep pets secured in a room without registers being cleaned — the noise from the equipment can stress animals. The truck-mounted vacuum running outside is loud, so let your neighbours know if you share walls. Professional duct cleaning in the GTA runs $300 to $700 and most companies recommend scheduling it every 3 to 5 years for typical households, or more frequently if you have pets, smokers, or family members with respiratory sensitivities.