Ontario · Energy · checked September 28, 2026

Duct leakage testing in Whitby

If some rooms never get warm, the problem is often the ductwork, not the furnace. In the Oshawa area, 82% of households heat with a forced-air furnace, so duct losses affect many Whitby homes.

Get matched in Whitby → 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

82%

Electric baseboards

Not published

Houses built before 1991

39%

How Whitby is built

Whitby's houses by when they were built Ten house shapes, one for each tenth of Whitby's 40,670 houses. Before 1961: 8%, 1961–1990: 32%, 1991–2000: 20%, 2001 or later: 41%. Older houses glow hotter.
  • Before 1961 8%
  • 1961–1990 32%
  • 1991–2000 20%
  • 2001 or later 41%
Each house stands for one in ten of Whitby's 40,670 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 Whitby

In the Oshawa area, 82% of households heat mainly with a forced-air furnace; natural gas is the main heating energy for 72% of households and electricity for about 17% (Statistics Canada, 2023).

Of Whitby's 40,670 houses (single-detached, semi-detached, row houses and duplexes), 8% were built before 1961 and 39% 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 Whitby

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.

Only assessments from the seven HRSP-approved organizations qualify for the $600 Home Renovation Savings rebate and its assessment-path upgrade rebates; each listing below says whether it's one of them.

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 Whitby

Provincial · needs an evaluation Home Renovation Savings — Home Energy Assessment path Up to $10,000 per home for insulation, windows and air sealing, plus $600 back on your assessments — if the follow-up assessment is done by December 31, 2026 Open · deadline Provincial Home Renovation Savings — direct rebates (no assessment) Heat pumps up to $7,500 ($12,000 ground-source), solar with battery up to $10,000, plus attic, thermostat and appliance rebates — no assessment needed Open Federal CMHC Eco Improvement premium refund 25% back on your CMHC mortgage insurance premium after $20,000 of energy renovations Open Municipal Durham Greener Homes Loan Durham Region local improvement charge loan (Durham Greener Homes): up to $125,000 at 2% interest, fixed 15-year repayment on the property tax bill, with up to 50% of eligible funds available up front. At least 80% must go to energy-efficiency upgrades (insulation, windows, air sealing, heat pumps, heat pump water heaters, solar, batteries); up to 20% can go to other eligible items (flood/weather resilience, electrical, EV charging, EnerGuide evaluation and permit costs). Pre- and post-retrofit EnerGuide evaluations are required (pre-retrofit on or after April 28, 2022). Start by booking a free Greener Homes Coach consultation. Municipal Deep Retrofit Rebate (Whitby) For Whitby residents only, administered by Durham Greener Homes: $2,500 for cutting modelled energy use by at least 50% between pre- and post-retrofit EnerGuide evaluations, plus $50 per extra percentage point, up to $5,000 at 100%. Minimum project cost $30,000 before tax; stacks with other rebates, including Home Renovation Savings; enrol before the work (pre-retrofit evaluation on or after April 28, 2022). Whitby's separate Weather-ready rebate is fully subscribed.

Duct leakage testing in Whitby: common questions

How much does duct leakage testing cost in Whitby?

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 Whitby

Duct leakage testing in Oshawa7 kmDuct leakage testing in Ajax7 kmDuct leakage testing in Pickering13 kmDuct leakage testing in Clarington23 kmDuct leakage testing in Markham28 km All 70 cities →

Sources

Checked September 28, 2026. Census figures are for the municipality (Ontario); climate data is NRCan's HOT2000 station Toronto Buttonville (34 km away).

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