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
📐
Heat Pump Size & BTU Calculator
Find the right heat pump capacity for your home. Get your recommended BTU output in under 2 minutes.
What is your home’s square footage?
1,500 sq ft
500 sq ft5,000 sq ft
What climate zone do you live in?
Climate affects how much heating and cooling capacity you need.
How well insulated is your home?
What are your ceiling heights?
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📐 Size Calculated
Your Recommended Heat Pump Size
Recommended BTU
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Tonnage
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A proper Manual J load calculation by a certified HVAC contractor ensures perfect sizing for your home.

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What Size Heat Pump Do I Need in Canada?

Choosing the correct heat pump size is critical for efficiency and comfort start with our heat pump buying guide for the full decision process. An oversized heat pump short-cycles it heats or cools quickly then shuts off, a common cause behind heat pump not working service calls. An undersized unit runs constantly and struggles on extreme weather days. see symptoms in our heat pump not cooling in summer troubleshooting guide. Heat pumps are rated in BTU/h or tons (1 ton = 12,000 BTU/h) for both heating and cooling capacity. see our full heat pump buying guide for efficiency ratings.
Home Size (sq ft)Recommended Tons (Moderate Climate)Recommended Tons (Cold Climate)
600 – 9001.0 – 1.5 ton1.5 – 2.0 ton
900 – 1,4001.5 – 2.0 ton2.0 – 2.5 ton
1,400 – 2,0002.0 – 2.5 ton2.5 – 3.0 ton
2,000 – 2,8002.5 – 3.5 ton3.5 – 4.0 ton
2,800 – 4,0003.5 – 4.5 ton4.5 – 5.0 ton
*These are general estimates. A professional Manual J calculation accounts for insulation, windows, climate zone, and air sealing — read our complete air sealing and insulation guide for precise sizing. see Natural Resources Canada's heat pump guidance for homeowners.

Sizing Factors for Heat Pumps

🌡️ Climate Zone
Canadian cities vary dramatically, and rising adoption is changing how contractors size systems — see heat pump trends across Canada. 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 — our heat pumps in Canada guide covers 14 factors that affect sizing. Improving insulation first can reduce the required heat pump size.
🪟 Window Area & Exposure
Homes with large south-facing windows have higher solar gain (beneficial for winter heating), while large north-facing windows increase heat loss. Both factors affect your home's required BTU load. Use our Heat Pump Size & BTU Calculator to estimate the correct heating and cooling capacity based on your home's size, orientation, and insulation.
🏔️ Ceiling Height
Standard sizing assumes 8-ft ceilings. Vaulted or 10-ft+ ceilings increase the volume of air to condition — homes with these layouts sometimes suit a geothermal system instead.

Design Temperatures by Canadian City

CityWinter Design TempSizing Recommendation
Vancouver, BC-3°CStandard sizing
Toronto, ON-20°CCold-climate rated unit
Calgary, AB-29°CCold-climate, oversized 10%
Winnipeg, MB-31°CCold-climate, oversized 15%
Edmonton, AB-33°CCold-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, and in Canada the heating load at winter design temperature usually dominates.

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 — compare top-rated systems in our best heat pumps in Canada roundup.

It depends on your home's layout and ductwork — a central ducted heat pump vs. furnace comparison can help you decide which fits your setup. 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 — see our DIY heat pump installation guide for what's involved.

🇨🇦 Rebates Available
Canadian homeowners may qualify for up to
$6,500
in federal and provincial rebates on qualifying heat pump systems.
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