How Halifax is built
- Before 1961 22%
- 1961–1990 42%
- 1991–2000 14%
- 2001 or later 22%
Why the design temperature matters in Halifax
−15.9°C is the 19th-mildest design temperature of the 70 cities we cover. The F280 calculation works out how much heat each room loses on that design day, from the house's actual walls, windows, air leakage and ceiling insulation.
At −15.9°C, a cold-climate heat pump sized to the calculation can carry most of the season, and the number shows how much backup heat the coldest days need.
In the Halifax area, 26% of households heat mainly with a heat pump, 20% with electric baseboards, 20% with a boiler and radiators and 12% with a forced-air furnace; electricity is the main heating energy for 28% of households and oil for 23% (Statistics Canada, 2023).
Halifax's warm summers make the cooling side count too. CSA F280 covers cooling capacity as well as heating, so ask for both numbers: a heat pump sized only for winter can be too big for summer, which leaves rooms cool but clammy.
What CSA F280-12 asks for
The National Building Code 2020 requires the heating capacity for a house to be worked out with CSA F280, and its list of referenced documents names the 2012 edition, CSA F280-12. Provincial codes can name their own edition and climate values, so ask your designer which ones the calculation uses.
Why skipping it costs money
Contractors who size by square footage routinely oversize. An oversized heat pump costs more to buy, cycles on and off, dehumidifies poorly in summer and wears faster. An undersized one leans on backup heat. The F280 report is the evidence either way, and it's worth having before you compare quotes.
What it costs
About $150–$400 as a standalone calculation (a September 2026 planning range; quotes vary). Many energy advisors bundle it with an EnerGuide evaluation, which also gives the calculation measured air-leakage data instead of an assumption.
Atlantic Canada Maritimes and Newfoundland
What this means in Halifax’s climate
Damp, windy, icy winters and costly oil: switch to heat pumps, seal, test for radon.
Atlantic winters are wet, windy and icy rather than extremely cold, and summers are mild. Heating oil is still common and its price rose sharply in 2026, while heat pumps already heat many homes. An EnerGuide evaluation here should plan the move off oil, seal wind-driven leaks, fix moisture before insulating, and include a radon test.
- Plan your move off oil. Oil prices rose 65% to 81% in a year, and corrosion is a leading cause of oil tank leaks. Cold-climate heat pumps can be up to three times as efficient as oil heating. Ask: Ask the advisor to note your oil tank's age and condition, and to size a cold-climate heat pump with a backup plan.
What else homes in Halifax 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)
- Heat pumps, Canada Greener Homes (NRCan)
- Heat pump basics (NRCan)
- Heating and Cooling With a Heat Pump (NRCan)
- Primary heating systems by household, Table 38-10-0286-01 (Statistics Canada)
- Household heating oil prices, Table 18-10-0001-01 (Statistics Canada)
- Electricity price comparison, April 2025 (Hydro-Québec)
- Prevent oil tank spills (Government of Nova Scotia)
- Canada's top weather stories of 2019 (ECCC)
- Canada's top weather stories of 2022 (ECCC)
- Canada's top weather stories of 2023 (ECCC)
- 2024 Cross-Canada Survey of Radon Exposure
- Guide for Radon Measurements in Homes (Health Canada)
- Conditions for thermal scans, ASTM C1060 summary (Cx Associates)
- Canada's top weather stories of 2025 (ECCC)
NRCan-licensed service organizations serving Halifax
In Nova Scotia, EnerGuide home energy assessments are booked through Efficiency Nova Scotia's Home Energy Assessment program, which assigns one of its Delivery Agent Partners; NRCan's list shows no separate service organizations for Nova Scotia postal codes.
Heat pump programs in Halifax
Heat loss calculation in Halifax: common questions
What design temperature is used for heat pump sizing in Halifax?
NRCan's HOT2000 climate data gives −15.9°C for Shearwater. Your designer may use the building code's design value for Halifax, which can differ slightly; ask which one the calculation uses.
What is CSA F280-12?
The 2012 edition of CSA F280, Determining the required capacity of residential space heating and cooling appliances. The National Building Code 2020 requires heating capacity for a house to be determined with it.
How much does a heat loss calculation cost?
About $150–$400 standalone as a planning range; often less when bundled with an EnerGuide evaluation.
Who does F280 calculations in Halifax?
Energy advisors and HVAC designers; ask for the F280 report itself.
Do rebate programs require a heat loss calculation?
Requirements vary by program and change often. Even where it isn't required, it is the best protection against an oversized or undersized system.