Furnace Savings Calculator
Hamilton, ON
Your old 80% furnace is wasting 20% of every dollar of gas you pay Enbridge. Find out exactly how much upgrading saves annually and how fast it pays for itself in Hamilton.
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Get Free QuotesHow Much Can You Save on Gas in Hamilton?
Hamilton’s heating season runs roughly 190–210 days — longer and more demanding than many homeowners realize. That extended season is exactly why furnace efficiency gains compound so meaningfully here. The difference between an 80% AFUE furnace and a 96% AFUE unit isn’t a one-time saving — it’s 16 cents out of every gas dollar recovered, every year, for 15–20 years of system life.
On a typical Hamilton Enbridge gas bill of $1,800–$2,400 per year (where roughly 65–70% goes to heating), upgrading from 80% to 96% AFUE saves approximately $265–$420 annually. At the higher end of usage, it’s closer to $500/year.
| Upgrade Path | Annual Gas Savings — Hamilton | 15-Year Savings | Payback (No Rebate) |
|---|---|---|---|
| 60% → 80% AFUE | $350 – $600/yr | $5,250 – $9,000 | 3 – 6 years |
| 80% → 92% AFUE | $165 – $300/yr | $2,475 – $4,500 | 4 – 8 years |
| 80% → 96% AFUE | $265 – $420/yr | $3,975 – $6,300 | 3 – 6 years |
| 80% → Heat Pump | $500 – $1,200/yr* | $7,500 – $18,000* | 5 – 10 years* |
| 96% → 98% AFUE | $35 – $65/yr | $525 – $975 | 12 – 25 years |
*Heat pump savings replace both furnace gas AND AC electricity costs. Interested in heat pump systems? Learn how AC installation pairs with furnace replacement.
The Math Behind the Savings — How AFUE Works
AFUE stands for Annual Fuel Utilization Efficiency. An 80% AFUE furnace converts 80% of the gas it consumes into useful heat — the remaining 20% escapes as flue gas and jacket losses. A 96% AFUE furnace wastes only 4%. The savings calculation is straightforward: take your annual heating gas cost, multiply by the efficiency difference, and you have the annual savings.
Example: A Hamilton home spends $1,400/year on gas for heating (from a $2,000 total Enbridge bill where ~70% is heating). Upgrading from 80% to 96% AFUE: the new unit needs 80÷96 = 83.3% of the gas the old one did. Savings = $1,400 × (1 − 0.833) = $234/year. On a higher-consumption home spending $2,100 on heating gas, the same upgrade saves $350/year.
| Annual Heating Gas Cost | 80%→96% AFUE Savings | 80%→80% (No Change) | 15-Yr Cumulative Savings |
|---|---|---|---|
| $1,000/yr | $167/yr | $0 | $2,500 |
| $1,400/yr | $234/yr | $0 | $3,510 |
| $1,800/yr | $300/yr | $0 | $4,500 |
| $2,200/yr | $367/yr | $0 | $5,505 |
| $2,600/yr | $433/yr | $0 | $6,495 |
✓ Enbridge Rebates That Accelerate Payback
- Enbridge Home Efficiency Rebate+: Rebates available on qualifying 96%+ AFUE furnace upgrades — look for Goodman furnaces and other high-efficiency brands that qualify for the highest tiers. Amounts vary by season, currently up to $250–$1,000 depending on upgrade path.
- Canada Greener Homes Grant: Up to $5,000 for cold-climate heat pumps — if you're replacing the furnace with a heat pump, this rebate alone brings the payback period from ~8 years to ~4 years for many Hamilton homeowners
- Energy Star Most Efficient: Models with this designation qualify for the highest rebate tiers — look for it when comparing equipment
- Stacking Enbridge + federal rebates is permitted — some Hamilton homeowners have received $1,500–$7,500+ in total incentives on furnace replacement projects
FAQ: Furnace Savings Calculator Hamilton
My Enbridge bill is $3,000/year. How much of that is heating vs. other gas uses?
In a typical Hamilton home, about 65–75% of your gas bill goes to space heating. On a $3,000 annual bill, that’s roughly $1,950–$2,250 in heating costs.
Can I find my current furnace's AFUE if I don't know it?
Yes — three ways. First, check the yellow EnerGuide label on the furnace itself. Second, look up the model number in the AHRI certified products directory, or estimate based on installation year. Older furnaces are generally less efficient than newer high-efficiency models.
My furnace is already 96% AFUE. Is upgrading to a 98% model worth it?
Usually not for energy savings alone. The efficiency gain is small, and the payback period is often longer than the furnace’s lifespan. Upgrade only if the added comfort features are valuable to you.
💰 Enbridge Rebates
Up to $1,000
Enbridge rebates on 96% AFUE upgrades — ask us what’s currently available