Heat Pump Size & BTU Calculator — Burlington, ON

Proper sizing is the most overlooked factor in heat pump performance. Find the right tonnage and BTU rating for your Burlington home — calibrated for Ontario’s climate.

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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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What Size Heat Pump Does a Burlington Home Need?

Heat pump sizing is more complex than AC sizing because you're sizing for both heating and cooling — and in Burlington, the heating load usually drives the decision. A heat pump that's too small won't maintain comfortable temperatures on the coldest winter nights. A heat pump that's too large short-cycles, wears out faster, and struggles with humidity control in summer.
Home Size (sq ft)Heat Pump SizeBTU/h Heating CapacityNotes
700 – 1,1001.5 – 2 tonnes18,000 – 24,000 BTU/hTypical Burlington condo or small detached
1,100 – 1,6002 – 2.5 tonnes24,000 – 30,000 BTU/hSemi-detached, older bungalow
1,600 – 2,2002.5 – 3 tonnes30,000 – 36,000 BTU/hStandard Burlington two-storey
2,200 – 3,0003 – 3.5 tonnes36,000 – 42,000 BTU/hLarger detached, well-insulated home
3,000 – 4,0003.5 – 5 tonnes42,000 – 60,000 BTU/hExecutive home, may need zoning

Why Heat Pump Sizing Is Different from AC Sizing

An air conditioner only needs to handle the cooling load (summer peak). A heat pump must handle both the cooling load in summer and the heating load in winter — and in Burlington, the heating load is typically larger. This means a heat pump correctly sized for heating will be slightly oversized for cooling, which is why inverter-driven variable-speed compressors are so important: they modulate output to match actual demand rather than cycling on/off at full capacity.
🌡️ Heating Design Temperature
Burlington's winter design temperature is −16°C. Your heat pump must maintain indoor comfort at this temperature, either alone or with a backup heat source.
🏠 Insulation Quality
A well-insulated 2,000 sq ft home may need a smaller heat pump than a poorly insulated 1,500 sq ft home. Insulation level is the single biggest variable after square footage.
🪟 Window Exposure
South-facing windows gain heat in winter (helpful) and in summer (adds cooling load). Large north or west windows add heating load significantly.
📏 Ceiling Height
9-foot or vaulted ceilings increase the volume of air to be conditioned. Homes with high ceilings typically need 10–15% more capacity than the square footage alone suggests.

FAQs – Heat Pump Size & BTU Calculator

How does the Heat Pump Size & BTU Calculator work?

Our Heat Pump Size & BTU Calculator estimates the recommended heat pump capacity based on factors such as your home's square footage, climate, insulation level, ceiling height, and the number of occupants. It helps you choose a system that delivers efficient heating and cooling.

Selecting the right heat pump size is essential for comfort, energy efficiency, and long-term performance. An undersized unit may struggle to maintain indoor temperatures, while an oversized system can cycle on and off too frequently, increasing energy consumption and reducing system lifespan.

BTU (British Thermal Unit) measures the amount of heating or cooling a heat pump can provide. The correct BTU rating ensures your system can effectively maintain comfortable indoor temperatures without wasting energy.

The calculator provides a reliable estimate based on the information you enter. However, for the most accurate system sizing, we recommend a professional HVAC assessment that considers your home's layout, insulation, windows, and local climate.

For the best estimate, you'll need your home's approximate square footage, ceiling height, insulation quality, climate zone, number of rooms, and the type of heating and cooling system you currently use.

Yes. Our Heat Pump Size & BTU Calculator is completely free and easy to use. It provides an instant estimate to help homeowners understand the recommended heat pump size before requesting a professional consultation.

For average insulation in a moderate climate, expect a 3 to 4-ton unit — sometimes 5 tons for larger or less-insulated homes. Confirm with a local pro for your exact fit.

A 2.5-ton unit typically covers 1,250–1,600 sq ft; a 3-ton unit covers 1,500–1,800 sq ft. Insulation and windows shift these ranges.

Slightly larger is generally the safer call — modern units adjust output to demand, while undersized units struggle in Burlington's coldest stretches.

Oversized units short-cycle, wasting energy and hurting humidity control. Undersized units run non-stop, raising bills and wearing out faster.

Ducted systems work like a central AC — tying into your existing ductwork and using the furnace blower to circulate air.

Yes, ducted systems suit homes with existing ductwork; ductless systems heat specific zones in homes without ducts, like older boiler-heated houses.

Not Sure? Let Us Size It for You

Our Burlington team performs a proper Manual J heat load calculation — free with your estimate.
📐 Proper Sizing Matters
An oversized heat pump short-cycles and wears out faster. An undersized one can't keep up on cold Burlington nights.

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Free Heat Load Assessment

Get a proper Manual J heat load calculation from our Burlington HVAC team — included free with your installation estimate.