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High-Efficiency vs Standard Furnace: Is the Upgrade Worth It?
Our take
High-efficiency in 2026 — required by Canadian code (90%+ minimum), and the operating savings pay back fast.
Side by side
| Factor | Standard / Mid-Efficiency (80% AFUE) | High-Efficiency (96% AFUE) |
|---|---|---|
| AFUE | 80% | 96% |
| Annual gas cost (2,000 sq ft GTA) | ~$1,500 | ~$1,250 |
| Upfront install cost | Roughly equivalent now (mid-eff hard to source) | $5,000–$7,500 |
| Vent type | B-vent metal | PVC sidewall (condensing) |
| Compatible with heat-pump retrofit | Yes | Yes |
Standard / Mid-Efficiency (80% AFUE) wins when:
- Almost never — most jurisdictions now require 90%+ minimum AFUE on new installs
High-Efficiency (96% AFUE) wins when:
- Default for any new install in Canada
- Required by code (90%+ minimum)
The full take
Mid-efficiency furnaces (80% AFUE) are essentially out of the market for residential new installs in Canada — minimum efficiency standards now require 90%+ for most situations.
The 96% high-efficiency furnace is the standard choice in 2026. Saves $200–$300/year on gas vs an old 80% unit, and the install is comparable in cost (only the venting differs — PVC sidewall instead of metal B-vent).
If you currently have an 80% furnace and it's still working, run it until end-of-life. The $5,000–$7,500 replacement cost takes too long to pay back on operating-cost savings alone. But when you DO replace, go 96% — there's no compelling reason not to.
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Mississauga, ON · Greater Toronto Area and up to 2 hours out — London, Kitchener, Barrie, Kingston, Niagara.