Northwest Territories · 16 local services · checked September 28, 2026

Home energy audits and home testing in Yellowknife

Yellowknife gets about 7,856 heating degree-days a year (extreme cold, very long winters), 3% of its houses were built before 1961, and one NRCan-licensed service organization lists its postal codes. Pick a service for the local details.

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A house raised on steel piles in a northern town, a snowmobile parked outside in ice fog

How Yellowknife is built

Yellowknife's houses by when they were built Ten house shapes, one for each tenth of Yellowknife's 5,225 houses. Before 1961: 3%, 1961–1990: 54%, 1991–2000: 21%, 2001 or later: 22%. Older houses glow hotter.
  • Before 1961 3%
  • 1961–1990 54%
  • 1991–2000 21%
  • 2001 or later 22%
Each house stands for one in ten of Yellowknife's 5,225 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. More snow in the drawing means more heating degree-days: a longer, colder heating season. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), NRCan HOT2000 climate data.

Yellowknife at a glance

Climate

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. Extreme cold and a very long heating season: envelope work comes first, and heating reliability is a safety issue.

Housing

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. The typical house dates from 1981–1990.

Radon

Health Canada's 2012 survey found 5.4% of 185 homes tested in the Northwest Territories health region above the guideline.

The North Yukon, NWT and Nunavut

What homes in Yellowknife need

Extreme cold and costly energy: envelope first, reliable heat, safe oil tanks, permafrost.

The North has the longest, coldest winters we cover, with temperatures that reach −41°C. About half of Yukon homes heat with oil, and electricity costs more than in southern cities, so every bit of heat kept in saves real money. An EnerGuide evaluation here should put the building envelope first, then check heating reliability, oil tank safety, ventilation and humidity limits, and signs of permafrost movement.

In Yellowknife: Yellowknife has the highest heating demand of any city we cover, with about 89 days a year of wind chill below −30, and power costs well over 30¢/kWh once extra charges are added. Envelope upgrades save more here than almost anywhere else.

What drives bills and comfort here

  • The longest, coldest heating season we cover: cold snaps reach −41°C in both Whitehorse and Yellowknife.
  • Oil heats about half of Yukon homes, and heating oil averaged about $2.25 to $2.28 a litre in Whitehorse and Yellowknife in September 2026.
  • Electricity is expensive: about 26¢/kWh in Whitehorse, and well over 30¢ in Yellowknife once extra charges are added (2026).
  • Yukon's grid is mostly hydro, but liquefied natural gas and diesel cover winter peaks, so deep-winter heat-pump use partly runs on fossil power.

Local risks to plan for

  • About 20,000 people were evacuated for almost three weeks in August 2023 as wildfire approached.
  • Thaw-sensitive permafrost patches can shift houses, oil tanks and fuel lines.
  • Radon: about 1 in 5 NWT homes tested at or above the guideline in 2024.

What to check first, and why

  1. 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 your energy advisor: Ask for a blower door test with a thermal scan, and a list of envelope upgrades ranked by savings.

    Blower door testInfrared (thermal) scanAttic inspection

  2. Keep heat reliable and oil tanks safe

    Oil is the main fuel, and losing heat at −40°C is serious. Permafrost movement can tilt oil tanks and strain fuel lines.

    Ask your energy advisor: Ask the advisor to check the burner, venting and CO alarms, and to look for a leaning tank or bent supply line.

    Combustion safety testCarbon monoxide check

  3. Ventilate within humidity limits

    A tight house needs fresh air, but at −40°C indoor relative humidity must stay very low, about 12% to 20% depending on the windows, to avoid frost and condensation.

    Ask your energy advisor: Ask for a ventilation assessment, and an HRV or ERV with frost protection.

    Ventilation assessment

  4. Watch for permafrost movement

    Whitehorse sits where permafrost underlies 10% to 50% of the ground, and Yellowknife-area homes can sit on thaw-sensitive patches. Thaw can crack walls and jam doors.

    Ask your energy advisor: Ask the advisor to note sticking doors, new cracks or sloping floors, and call an engineer if the house is moving.

  5. Test for radon

    Whitehorse ranked among the highest municipalities in the 2024 national survey, and about 1 in 4 Yukon homes tested at or above Health Canada's guideline.

    Ask your energy advisor: Run a 3-month test in the heating season, and retest after air sealing.

    Radon test

Tests that matter most here

  • Blower door test The biggest savings come from finding and sealing leaks; it measures ACH50 before and after. Best timing: October to April, avoiding strong wind.
  • Infrared (thermal) scan Deep cold makes insulation gaps and air leaks stand out clearly. Best timing: October to April, almost any day; avoid strong wind and sun on the walls being scanned.
  • Combustion safety test Oil and propane heat many homes, and a tighter house can cause backdrafting. Best timing: With the blower door visit.
  • Ventilation assessment Checks that fresh air reaches a tight house without pushing indoor humidity past what the windows can handle. Best timing: In mid-winter, when humidity limits are tightest.
  • Radon test High radon in Yukon. Best timing: At least 91 days in the heating season.

Upgrades that usually pay off here

  1. Air sealing and insulation to northern levels. The biggest savings anywhere we cover: the highest heating demand, paid for with costly oil and power. Seal first, then insulate attics, walls and rim joists.
  2. Efficient heating with full backup. A high-efficiency oil, propane or pellet system, or a cold-climate heat pump with full backup where power is mostly hydro. Air-source heat pumps can't carry the coldest weather here.
  3. HRV with frost protection. Brings in fresh air without throwing away heat in a tight house.
  4. Energy-efficient windows. Cut heat loss and let you keep a little more indoor humidity before windows frost.

Heating and cooling equipment

  • Air-source heat pumps need a full-size backup here: in NRCan's subarctic zone, only about 45% of the yearly heating load comes at −9.4°C or warmer.
  • Cold-climate air-source heat pumps are rated to about −30°C, while cold snaps here reach −41°C.
  • An ERV suits homes where indoor air runs very dry, as it does in northern winters; whichever you choose, it needs frost protection.
  • Keep CO alarms near every fuel-burning appliance, and have oil burners serviced before winter.

Health and comfort

  • Radon: about 1 in 4 Yukon homes and about 1 in 5 NWT homes tested at or above 200 Bq/m³ in the 2024 survey. Test every home.
  • Wildfire smoke and evacuation: about 20,000 people left Yellowknife and nearby communities for almost three weeks in August 2023. Have filtration ready for smoky days.
  • Extreme cold: Whitehorse fell to −44.8°C in January 2022. Protect pipes, and have a plan if the heat goes out.
  • Very dry indoor air: humidify only within window-condensation limits, or frost and moisture build up on windows and in walls.

Common mistakes in this climate

  • Banking snow or water against the foundation. It warms the ground and can thaw permafrost under the house. Keep snow and drainage away from the foundation.
  • An air-source heat pump without full backup. It can't carry the coldest weather here.
  • Leaving oil tanks and lines unchecked. Ground movement can tilt tanks and bend supply hoses; check them every season.
  • Air sealing without ventilation and safety checks. A tight house needs fresh air and a combustion safety test so appliances vent safely.

When to book: Book the evaluation between October and April, when the cold makes leaks easy to find. Start a 3-month radon test in the heating season, and check the foundation in late summer, when thaw is deepest.

Sources for this climate guide · checked October 26, 2026

Local service guides for Yellowknife

Energy audits and tests

An energy advisor’s kit on a front-hall bench: infrared camera, pressure gauge with tubing, tape measure, headlamp and a floor sketch

Home energy audit

1 licensed organization Companies NRCan licenses to do EnerGuide evaluations
A red blower-door panel with a large fan fitted into the front doorway of a brick bungalow, a pressure gauge on a stool inside

Blower door test

7,856 degree-days Extreme cold, very long winters
Hands holding an infrared camera aimed at a ceiling corner beside a frosty window; the screen shows a cold streak

Thermal imaging inspection

7,856 degree-days Extreme cold, very long winters
A kitchen table with a house floor plan, a laser measure, a tape measure and a laptop showing the plan

Heat loss calculation

Design temp −39.2°C The cold day heating is sized for
A duct-testing fan on a basement floor connected by flexible duct to a furnace, a pressure gauge hanging from a joist

Duct leakage testing

7,856 degree-days
A gloved hand inserting a combustion analyzer probe into a furnace flue pipe in a basement

Combustion safety test

No piped gas
A heat recovery ventilator on a basement wall with four insulated ducts running up between the joists

Ventilation and humidity assessment

22% built since 2001 Newer, tighter homes rely on fans or an HRV
Loose-fill insulation between attic joists, a yellow ruler showing its depth and frost on the roofing nails above

Attic insulation inspection

57% built before 1991 Older attics usually need more insulation
Utility bills and a phone showing a monthly energy-use chart on a kitchen table

Energy bill analysis

Naka Power Utilities (formerly Northland Utilities) Download 12 months of usage from your account

Home health tests

A small digital radon monitor on a bookshelf in a finished basement family room

Radon testing

5.4% above guideline (2012) Neighbours' results don't predict yours: test
A carbon monoxide alarm on an upstairs hallway wall outside the bedrooms at night

Carbon monoxide testing

No rule found Install alarms anyway
A moisture meter pressed into water-stained basement drywall, an air-sampling pump on a tripod nearby

Mould and indoor air quality testing

57% built before 1991 Older homes have more damp spots
A gloved hand holding a sealed sample bag above vermiculite insulation between attic joists

Asbestos and vermiculite testing

57% built before 1991 Common in materials until about 1990
A gloved hand swabbing layers of cracked old paint on a wooden window sill

Lead paint testing

3% built before 1961 Pre-1960 paint probably contains lead
Filling a water-sample bottle at a farmhouse kitchen tap with the aerator removed, snowy fields and a barn outside

Well water testing

Wells rare Only homes on private wells need it

For businesses and buildings

An auditor walking between rooftop heating and cooling units on a snowy commercial roof

Commercial energy audit

1 incentive program

Who does energy evaluations in Yellowknife

In the Northwest Territories, the Arctic Energy Alliance, a non-profit, is the licensed service organization for Yellowknife.

One NRCan-licensed service organization lists Yellowknife postal codes. See the list with phone numbers and coverage →

Rebates and financing for Yellowknife homes

Territorial Territorial energy programs (YT · NT · NU) Yukon pays up to $10,500 toward a heat pump (up to $24,000 if income-qualified) and up to $12,000 for wall insulation; the NWT's Arctic Energy Alliance subsidizes EnerGuide evaluations and insulation; Nunavut support runs through the Housing Corporation Open 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

Cities near Yellowknife

Edmonton993 kmSherwood Park998 kmWhitehorse1107 kmRed Deer1135 kmSaskatoon1237 kmCalgary1269 km All 70 cities →

Sources

Checked September 28, 2026.

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