Square Footage	Furnace BTU
1,000-1,200 sq. ft. Home	40,000 - 60,000 BTU
1,200-1,500 sq. ft. Home	60,000 BTU
1,500-1,800 sq. ft. Home	60,000 - 80,000 BTU
1,800-2,500 sq. ft. Home	80,000 - 100,000 BTU
2,500-3,500 sq. ft. Home	100,000 to 120,000 BTU

Heat Pump Size & BTU Calculator

Find the right heat pump tonnage for your Canadian home. Proper sizing means
better comfort, lower bills, and a longer-lasting system.

📐 Accurate Sizing

🇨🇦 Climate Zones Included

⚡ Instant Result

What Size Heat Pump Do I Need in Canada?

Choosing the correct heat pump size is critical for efficiency and comfort. An oversized heat pump short-cycles — it heats or cools quickly then shuts off, causing humidity problems and unnecessary wear. An undersized unit runs constantly and struggles on extreme weather days. Heat pumps are rated in BTU/h or tons (1 ton = 12,000 BTU/h) for both heating and cooling capacity.

Home Size (sq ft)	Recommended Tons (Moderate Climate)	Recommended Tons (Cold Climate)
600 – 900	1.0 – 1.5 ton	1.5 – 2.0 ton
900 – 1,400	1.5 – 2.0 ton	2.0 – 2.5 ton
1,400 – 2,000	2.0 – 2.5 ton	2.5 – 3.0 ton
2,000 – 2,800	2.5 – 3.5 ton	3.5 – 4.0 ton
2,800 – 4,000	3.5 – 4.5 ton	4.5 – 5.0 ton

*These are general estimates. A professional Manual J calculation accounts for insulation, windows, climate zone, and air sealing for precise sizing.

Sizing Factors for Heat Pumps

🌡️ Climate Zone

Canadian cities vary dramatically. Vancouver's mild winters allow smaller units; Winnipeg's –33°C design temps demand units with high cold-climate capacity and larger heating output.

🏠 Insulation Quality

Older homes with poor insulation may need a unit 20–30% larger than well-insulated homes of the same size. Improving insulation first can reduce the required heat pump size.

🪟 Window Area & Exposure

Homes with large south-facing windows have higher solar gain (good for heating), while large north-facing windows increase heat loss. Both affect your required BTU load.

🏔️ Ceiling Height

Standard sizing assumes 8-ft ceilings. Vaulted or 10-ft+ ceilings increase the volume of air to condition, requiring a larger unit by 10–20%.

Design Temperatures by Canadian City

City	Winter Design Temp	Sizing Recommendation
Vancouver, BC	-3°C	Standard sizing
Toronto, ON	-20°C	Cold-climate rated unit
Calgary, AB	-29°C	Cold-climate, oversized 10%
Winnipeg, MB	-31°C	Cold-climate, oversized 15%
Edmonton, AB	-33°C	Cold-climate + backup heat

Frequently Asked Questions

Is heat pump sizing different from air conditioner sizing?

Yes — heat pumps must be sized for both heating AND cooling loads. In cold Canadian climates, the heating load typically dominates sizing decisions. The unit must be able to deliver sufficient BTUs at your city's design winter temperature, not just at standard conditions.

Can I use a heat pump in very cold weather?

Modern cold-climate heat pumps (like the Mitsubishi Hyper Heat or Daikin Fit) maintain full or near-full heating capacity down to –25°C to –30°C. These are specifically engineered for Canadian winters and are now the recommended choice for most of the country.

Do I need one heat pump for the whole house or multiple units?

It depends on your home's layout and ductwork. A central ducted heat pump can serve an entire home. Mini-splits are typically installed per zone or per room. Multi-zone mini-split systems use one outdoor unit connected to 2–5 indoor units — ideal for homes without existing ductwork.

🇨🇦 Rebates Available

Canadian homeowners may qualify for up to

$6,500

in federal and provincial rebates on qualifying heat pump systems.

Check Eligibility

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