Quebec · Energy · checked September 28, 2026

Duct leakage testing in Sherbrooke

If some rooms never get warm, the problem is often the ductwork, not the furnace. Duct testing matters in Sherbrooke homes that have forced-air heating or a ducted heat pump.

Get matched in Sherbrooke → Duct leakage and airflow testing
A duct-testing fan on a basement floor connected by flexible duct to a furnace, a pressure gauge hanging from a joist

Typical cost

$200–$450

Forced-air furnaces

Not published

Electric baseboards

50%

Houses built before 1991

60%

How Sherbrooke is built

Sherbrooke's houses by when they were built Ten house shapes, one for each tenth of Sherbrooke's 41,360 houses. Before 1961: 18%, 1961–1990: 42%, 1991–2000: 13%, 2001 or later: 27%. Older houses glow hotter.
  • Before 1961 18%
  • 1961–1990 42%
  • 1991–2000 13%
  • 2001 or later 27%
Each house stands for one in ten of Sherbrooke's 41,360 houses (single-detached, semi-detached, row and duplex), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. Snowfall scales with heating degree-days. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), NRCan HOT2000 climate data.

Who needs it in Sherbrooke

In the Sherbrooke area, 50% of households heat mainly with electric baseboards and about 25% with a heat pump; electricity is the main heating energy for 66% of households (Statistics Canada, 2023).

Of Sherbrooke's 41,360 houses (single-detached, semi-detached, row houses and duplexes), 18% were built before 1961 and 60% before 1991, according to the 2021 Census. Ducts in older houses often run through unheated spaces with taped or unsealed joints, and supply runs to the far rooms are the first to suffer.

What the test shows

  • Total duct leakage, as a share of the system's airflow, measured with a duct-pressurization fan.
  • Airflow at each register, which explains why one bedroom is always cold.
  • Whether sealing and balancing will fix comfort problems before you buy bigger equipment.

Duct leakage testing in detail.

What it costs

About $200–$450 (a September 2026 planning range; quotes vary). It isn't part of a standard EnerGuide evaluation, so ask for it when you book if comfort is your main complaint.

NRCan-licensed service organizations serving Sherbrooke

In Quebec, EnerGuide evaluations for existing homes run through the provincial Rénoclimat program; the organizations below are the ones NRCan lists for Sherbrooke postal codes.

Duct leakage testing isn't part of a standard EnerGuide evaluation. Some of these organizations offer it, as do HVAC contractors with duct-testing equipment, so ask when you call.

Source: NRCan list of licensed service organizations, checked September 28, 2026. Call to confirm your street is covered and ask about wait times.

Programs in Sherbrooke

Provincial · needs an evaluation Rénoclimat (Quebec) Quebec's audit-linked path: an assigned evaluator for $150 + tax (refunded except the tax when you receive assistance), then rebates for insulation, air sealing, doors and windows Open Provincial Hydro-Québec LogisVert Heat pump grants scaled to capacity — $50–$120 per 1,000 BTU/h — plus appliances and solar, no audit needed Open Federal CMHC Eco Improvement premium refund 25% back on your CMHC mortgage insurance premium after $20,000 of energy renovations Open Federal Canada Greener Homes Affordability Program Free retrofits for low-to-median-income households in BC, Manitoba, Nova Scotia, PEI and Quebec — not available in Ontario Open · deadline

Duct leakage testing in Sherbrooke: common questions

How much does duct leakage testing cost in Sherbrooke?

Plan on about $200–$450. It is usually a separate service from an EnerGuide evaluation.

Is duct cleaning the same thing?

No. Cleaning removes dust; it doesn't find or seal leaks. A leakage test measures where air is lost.

Should I close vents in unused rooms?

Usually not. Closing registers raises duct pressure and can increase leakage elsewhere in the system.

Duct leakage testing near Sherbrooke

Duct leakage testing in Saint-Jean-sur-Richelieu107 kmDuct leakage testing in Longueuil120 kmDuct leakage testing in Trois-Rivières121 kmDuct leakage testing in Montréal134 kmDuct leakage testing in Terrebonne140 km All 70 cities →

Sources

Checked September 28, 2026. Census figures are for the municipality (Quebec); climate data is NRCan's HOT2000 station Lennoxville (9 km away).

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