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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. Certified HVAC contractors can give you accurate savings projections based on your home.
Get Free Quotes| Old AC (SEER) | New AC (SEER2) | Annual Savings (on $500/yr cooling bill) | 10-Year Savings |
|---|---|---|---|
| 8 SEER (pre-2000) | 18 SEER2 | ~$278/yr | ~$2,780 |
| 10 SEER (2000s) | 18 SEER2 | ~$222/yr | ~$2,220 |
| 13 SEER (2010s) | 18 SEER2 | ~$139/yr | ~$1,390 |
| 13.4 SEER2 (2023) | 20 SEER2 | ~$83/yr | ~$830 |
For most Canadian homeowners spending $300–$600/year on AC electricity, upgrading saves $80–$160/year. With a price premium of ~$800–$1,500 for a higher-SEER2 model, payback without rebates is 8–12 years. In provinces with higher electricity rates (Ontario, Alberta, Saskatchewan) and hotter summers (Ontario, Manitoba), the math improves. For heat pump conversions that include both heating and cooling savings, the payback is typically 5–8 years.
Check the EnerGuide label on your outdoor condenser unit, look in the owner’s manual, or search your model number at the AHRI (Air-Conditioning, Heating, and Refrigeration Institute) directory online. Pre-2006 AC units are often 8–10 SEER. Units from 2006–2015 are typically 13–16 SEER. Modern units are rated in SEER2.
Spring (April–May) is ideal — before cooling season starts, prices are lower, and contractors are less busy. If your AC is showing signs of failure (inefficient cooling, frequent repairs, age 12+ years), don’t wait until a midsummer breakdown. Emergency summer replacements are more expensive and may require waiting days for parts or technician availability.
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