HSPF vs COP: How to Compare Heat Pump Efficiency in Canada

When you compare HSPF vs COP, you’re comparing two different views of the same thing: how efficiently a heat pump heats your home. COP shows efficiency at one outdoor temperature, like a snapshot. HSPF shows average efficiency across a whole heating season, like a season summary. You need both to judge how a heat pump will perform in a Canadian winter.

HSPF vs COP at a glance

	COP	HSPF / HSPF2
Full name	Coefficient of performance	Heating seasonal performance factor
What it measures	Heat out ÷ electricity in, at one temperature	Total seasonal heat ÷ total seasonal electricity
Units	None (a simple ratio, e.g. 2.5)	BTU per watt-hour
Best for	Checking cold-day performance	Comparing overall heating efficiency
Where to find it	Manufacturer’s performance data	ENERGY STAR and product listings

What COP tells you

COP is the heat a heat pump delivers divided by the electricity it uses at a given moment. A COP of 2.5 means 2.5 kWh of heat for every 1 kWh of electricity. Electric baseboards have a COP of 1.

COP falls as the outdoor temperature drops. Natural Resources Canada (NRCan) reports typical air-source COPs of 2.0 to 5.4 at 8°C and 1.1 to 3.7 at −8°C. Read NRCan’s heat pump guide.

For a Canadian home, the most useful COP figures are the ones at −15°C and colder. For a deeper, plain-language explanation, read What is heat pump COP?

What HSPF tells you

HSPF adds up all the heat a heat pump delivers over a heating season and divides it by all the electricity it uses. Because it covers mild and cold days, it’s a good summary figure for comparing models.

Two things matter when you read HSPF in Canada:

• Climate region. HSPF is calculated for a specific climate. Region V represents a colder climate, similar to Ottawa and much of southern Canada, while Region IV represents a milder one. NRCan notes that available units reach an HSPF of 7.1 to 13.2 in Region V. Always compare figures for the same region.
• HSPF vs HSPF2. Newer listings use HSPF2, which comes from an updated test method. HSPF2 values are generally lower than old HSPF values for the same equipment, so don’t compare an HSPF2 number with an older HSPF number.

HSPF vs COP: which matters more in a Canadian winter?

Use them together:

1. Screen with HSPF2 (Region V). It tells you which models are efficient across a whole season.
2. Check COP and capacity at low temperatures. This tells you whether the unit will still heat efficiently, and produce enough heat, during a cold snap.

A model with a strong seasonal rating but weak cold-weather output may rely heavily on backup heat in January. That’s why NRCan’s criteria for cold-climate heat pumps look at both.

As of July 2026, a cold-climate air-source heat pump listed under NRCan’s Canada Greener Homes Initiative must have:

• HSPF2 (Region V) of at least 6.6, and SEER2 of at least 15.2
• a COP of at least 1.8 at −15°C at maximum capacity
• at least 70% of its rated capacity at −15°C
• a variable-capacity compressor

See the full NRCan product criteria.

How HSPF and COP affect rebates

When you weigh HSPF vs COP for an incentive application, remember that incentive programs set minimum efficiency requirements, often based on ENERGY STAR or NRCan’s cold-climate criteria. Requirements differ by program and change over time. Confirm the current rules with the program before you sign a contract. Start with NRCan’s directory of provincial and territorial incentives.

Questions to ask your installer

• What are the exact model numbers of the indoor and outdoor units?
• What is the HSPF2 for Region V for that combination?
• What are the heating capacity and COP at −15°C, and at our area’s coldest design temperature?
• At what outdoor temperature will backup heat turn on?
• Does the system meet the requirements of the incentive program I’m applying for?

You can check any model on NRCan’s list of ENERGY STAR certified air-source heat pumps. If you’re still choosing a system, our cold-climate heat pump buying guide and heat pump sizing guide cover the next steps.

The bottom line

In the HSPF vs COP comparison, neither rating wins on its own. HSPF2 shows seasonal efficiency; COP shows how the unit copes on the coldest days. Compare both for the exact equipment in your quote.

Frequently asked questions