British Columbia · Energy · checked September 28, 2026

Duct leakage and ductwork pressure testing in Nanaimo

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

Get matched in Nanaimo → 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

Not published

Houses built before 1991

54%

Older houses usually leak more and have less insulation

How Nanaimo is built

Nanaimo's houses by when they were built Ten house shapes, one for each tenth of Nanaimo's 33,520 houses. Before 1961: 15%, 1961–1990: 40%, 1991–2000: 18%, 2001 or later: 28%. Older houses glow hotter.
  • Before 1961 15%
  • 1961–1990 40%
  • 1991–2000 18%
  • 2001 or later 28%
Each house stands for one in ten of Nanaimo's 33,520 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. Rain marks the mild, wet winters: here moisture, not deep cold, is the main winter risk. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), NRCan HOT2000 climate data.

Who needs it in Nanaimo

Of Nanaimo's 33,520 houses (single-detached, semi-detached, row houses and duplexes), 15% were built before 1961 and 54% 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.

The same leaks cost you in summer when the ducts carry cooling: air from a central air conditioner or heat pump that escapes into an attic, garage or crawlspace is cooling you paid for. Sealing and balancing the ducts helps in both seasons, and it's worth doing before a new heat pump goes onto old ductwork.

What the test shows

  • Total duct leakage, as a share of the system's airflow, measured by pressure-testing the ductwork with a calibrated 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.

Coastal BC Lower Mainland and Vancouver Island

What this means in Nanaimo’s climate

Mild, wet winters and summer heat waves: fix moisture first, then cooling and heat pumps.

Coastal BC has Canada's mildest winters, but heavy rain from fall to spring soaks walls and roofs, and summer heat waves are now a health risk. Heating needs are the lowest of any region we cover, so damp, drafts and overheating are the common complaints. An EnerGuide evaluation here should look for moisture problems before any air sealing or insulation, then plan a heat pump that heats and cools.

  • Get ready for smoky days. Smoke reaches the coast too: Vancouver logged 171 hours of smoke and haze in September 2020. A good filter or air cleaner lets you keep windows shut. Ask: Ask whether your furnace or air handler can take a MERV 13 filter, or which certified portable air cleaner suits your main living area.

What else homes in Nanaimo need →

Sources for this climate guide · checked October 26, 2026

Communities served

Nearby communities without a page of their own: Powell River (about 80 km away). Nanaimo is the closest city we cover.

The organizations and professionals listed for Nanaimo may or may not travel to every community, so ask when you call.

NRCan-licensed service organizations serving Nanaimo

A service organization is a company that Natural Resources Canada (NRCan) licenses to deliver EnerGuide evaluations; its registered energy advisors do the home visit. 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 Nanaimo

Provincial · needs an evaluation BC Home Energy Improvement Bonus $20 for every percentage-point your home improves — $750 minimum, $2,000 maximum — or $300 for any two upgrades Open Provincial CleanBC Energy Savings Program Income-tiered CleanBC rebates paid through registered contractors: up to $13,000 toward a heat pump and up to $3,500 for a heat pump water heater — rebates, not free installs Open · deadline Federal National Heat Pump Rebate Announced October 8, 2026 and opening early 2027: up to $10,000 below the median income, $2,000 for other eligible homeowners Announced · opens 2027 Federal CMHC Eco Improvement premium refund A 25% energy-efficiency rebate 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 through provincial partners in BC, Manitoba, Newfoundland and Labrador, Nova Scotia, PEI and Quebec (Quebec's 2026–27 intake has closed) — not available in Ontario Open · deadline

Duct leakage testing in Nanaimo: common questions

How much does duct leakage testing cost in Nanaimo?

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.

What is ductwork pressure testing?

The same thing as a duct leakage test: registers are sealed, a calibrated fan pressurizes the ducts, and the airflow needed to hold the test pressure shows how leaky they are.

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 Nanaimo

Duct leakage testing in Richmond64 kmDuct leakage testing in Vancouver65 kmDuct leakage testing in Delta73 kmDuct leakage testing in Burnaby74 kmDuct leakage testing in Coquitlam83 km All 70 cities →

Sources

Checked September 28, 2026. Census figures are for the municipality (British Columbia); climate data is NRCan's HOT2000 station Comox (87 km away).

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