How Yellowknife is built
- Before 1961 3%
- 1961–1990 54%
- 1991–2000 21%
- 2001 or later 22%
Why air leakage matters in Yellowknife
Yellowknife gets about 7,856 heating degree-days a year, a measure of how much heating its climate needs, and its winter design temperature, the cold day heating systems are sized for, is −39.2°C. Those figures come from the climate data for Yellowknife in HOT2000, the home-energy software Natural Resources Canada (NRCan) gives energy advisors. That's the highest heating demand of the 70 cities we cover. Extreme cold and a very long heating season: envelope work comes first, and heating reliability is a safety issue.
Wildfire smoke reaches Yellowknife in some summers. The Government of Canada's advice is to keep windows and doors closed, limit exhaust fans and use the best filter your system can handle, so ask the advisor what your furnace or HRV can take.
Of Yellowknife's 5,225 houses (single-detached, semi-detached, row houses and duplexes), 3% were built before 1961 and 57% before 1991, according to the 2021 Census. Older houses usually test leakier than newer ones, and an EnerGuide report compares your result with homes of the same era, so you can see whether your house is typical or a problem.
After you seal: two checks
- Radon. Sealing shifts the pressure balance between the house and the soil. Health Canada's 2012 survey found 5.4% of 185 homes tested in the Northwest Territories health region above the guideline. Test before and after big air-sealing jobs. Radon testing in Yellowknife
What it costs in Yellowknife
A blower door test is part of every EnerGuide evaluation rather than a separate purchase. The Arctic Energy Alliance delivers subsidized EnerGuide evaluations: $200 + GST for a single-family existing home.
How the test works
- A calibrated fan is fitted into an exterior door and pulls air out until the house is at 50 pascals, the standard test pressure.
- The result is air changes per hour at 50 Pa (ACH50): how many times an hour the whole volume of air would leak out and be replaced at that pressure.
- While the fan runs, you and the advisor walk the house and feel for leaks at the attic hatch, rim joists, pot lights, trim and plumbing and wiring penetrations.
- A second test after the work shows what changed, and it is what most rebates pay on.
The North Yukon, NWT and Nunavut
What this means in Yellowknife’s climate
Extreme cold and costly energy: envelope first, reliable heat, safe oil tanks, permafrost.
Why it matters here: The biggest savings come from finding and sealing leaks; it measures ACH50 before and after.
Best timing: October to April, avoiding strong wind.
- Envelope first: seal, insulate, upgrade windows. With the coldest winters we cover and costly fuel, envelope work saves more than equipment changes. Today's new-home minimums here, about R-59 attics and R-22 walls, are good targets. Ask: Ask for a blower door test with a thermal scan, and a list of envelope upgrades ranked by savings.
What else homes in Yellowknife need →
Sources for this climate guide · checked October 26, 2026
- National Building Code of Canada 2020, climate data (NRC)
- Canadian Climate Normals 1991–2020 (ECCC)
- Keeping the Heat In (NRCan)
- Air-Source Heat Pump Sizing and Selection Guide (NRCan)
- Heat pumps, Canada Greener Homes (NRCan)
- Heating and Cooling With a Heat Pump (NRCan)
- Yukon Energy Facts 2024 (Yukon Bureau of Statistics)
- Household heating oil prices, Table 18-10-0001-01 (Statistics Canada)
- Residential electricity rates, April 2026 (ATCO Electric Yukon)
- Residential rate schedule, July 2026 (Naka Power, Yellowknife)
- Rates and riders (Naka Power, Yellowknife)
- Energy profile: Northwest Territories (Canada Energy Regulator)
- Energy profile: Yukon (Canada Energy Regulator)
- Keep Your House on Solid Ground: permafrost guide (Government of the NWT)
- Permafrost in Nunavut: a homeowner's guide (Government of Nunavut)
- Permafrost thaw mapping, Whitehorse area (Yukon University)
- 2024 Cross-Canada Survey of Radon Exposure
- Guide for Radon Measurements in Homes (Health Canada)
- Canada's top weather stories of 2022 (ECCC)
- Canada's top weather stories of 2023 (ECCC)
- Conditions for thermal scans, ASTM C1060 summary (Cx Associates)
NRCan-licensed service organizations serving Yellowknife
In the Northwest Territories, the Arctic Energy Alliance, a non-profit, is the licensed service organization for Yellowknife.
A service organization is a company that Natural Resources Canada (NRCan) licenses to deliver EnerGuide evaluations; its registered energy advisors do the home visit. A blower door test is part of every EnerGuide evaluation, so any organization below can do one in Yellowknife. Ask to walk the house with the advisor while the fan runs.
- Arctic Energy Alliance
Blower door test in Yellowknife: common questions
Where can I get a blower door test in Yellowknife?
Book an EnerGuide evaluation with any of the 1 NRCan-licensed organizations serving Yellowknife; the blower door test is part of every evaluation.
How much does a blower door test cost in Yellowknife?
It is included in an EnerGuide evaluation. The Arctic Energy Alliance delivers subsidized EnerGuide evaluations: $200 + GST for a single-family existing home.
What is a good blower door result?
Lower is better. Your EnerGuide report compares your air changes per hour at 50 Pa with homes of the same era, which is more useful than a single target number.
Does air sealing affect radon?
It can. Tightening a house changes the pressure difference with the soil, so test for radon before and after major air sealing.