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| 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 |
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These are estimates. Get precise quotes from certified HVAC contractors in your area — for free.
Get Free Quotes| Furnace Type | AFUE | Installed Cost (CAD) |
|---|---|---|
| Entry-Level Single Stage | 80% | $3,000 – $4,500 |
| Mid-Range Two Stage | 92–95% | $4,500 – $6,500 |
| High-Efficiency Variable Speed | 96–98% | $6,500 – $10,000+ |
| Natural Gas Furnace (average) | 92% | $4,800 – $7,200 |
| Propane Furnace | 92–96% | $5,000 – $8,500 |
A standard furnace replacement typically takes 4–8 hours for a professional HVAC technician. If ductwork or venting modifications are needed, it may take a full day or require a follow-up visit.
Yes — most Canadian municipalities require a mechanical permit for furnace installation. Your HVAC contractor typically handles this. Permits cost $50–$250 and ensure the work is inspected to code.
A well-maintained furnace lasts 15–25 years. High-efficiency models with annual tune-ups often reach the upper end of that range. If your furnace is over 15 years old, replacement is usually more cost-effective than major repairs.
Use the “5,000 Rule”: multiply your furnace’s age by the repair cost. If the result exceeds $5,000, replacement is generally the smarter financial choice. Our Repair or Replace Quiz gives a scored recommendation.
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