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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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New Furnace Savings Calculator
How much money could you save by upgrading to a new high-efficiency furnace? Find out with this quick calculator.
How old is your current furnace?
Older furnaces are significantly less efficient and cost more to run.
What are your approximate total annual natural gas costs?
Take your average monthly gas bill Γ— 12. The average in Canada is about $1,000/year. Include all gas appliances.
$1,000 / year
$400$3,500
How many appliances in your home use natural gas?
Select all that apply β€” helps estimate what portion of your gas bill is for heating.
Select the efficiency (AFUE) you would choose for your new furnace
Entry-level models start at about 92% and go up to about 98% for high-end models.
92%
92% (Entry)98% (Premium)
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How Much Can You Save on Gas in Hamilton?

Hamilton’s heating season runs roughly 190–210 days β€” 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 β€” 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 ofΒ $1,800–$2,400 per yearΒ (where roughly 65–70% goes to heating), upgrading from 80% to 96% AFUE saves approximatelyΒ $265–$420 annually. At the higher end of usage, it’s closer to $500/year.

Upgrade PathAnnual Gas Savings β€” Hamilton15-Year SavingsPayback (No Rebate)
60% β†’ 80% AFUE$350 – $600/yr$5,250 – $9,0003 – 6 years
80% β†’ 92% AFUE$165 – $300/yr$2,475 – $4,5004 – 8 years
80% β†’ 96% AFUE$265 – $420/yr$3,975 – $6,3003 – 6 years
80% β†’ Heat Pump$500 – $1,200/yr*$7,500 – $18,000*5 – 10 years*
96% β†’ 98% AFUE$35 – $65/yr$525 – $97512 – 25 years

*Heat pump savings replace both furnace gas AND AC electricity costs. Hamilton Enbridge gas consumption ~2,000–2,800 mΒ³/yr for average 2-storey home. Current Enbridge commodity rate approximately $0.138/mΒ³ (subject to OEB rate changes).

The Math Behind the Savings β€” How AFUE Works

AFUE stands for Annual Fuel Utilization Efficiency. An 80% AFUE furnace converts 80% of the gas it consumes into useful heat β€” 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 80Γ·96 = 83.3% of the gas the old one did. Savings = $1,400 Γ— (1 βˆ’ 0.833) =Β $234/year. On a higher-consumption home spending $2,100 on heating gas, the same upgrade savesΒ $350/year.

Annual Heating Gas Cost80%β†’96% AFUE Savings80%β†’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

βœ“ Enbridge Rebates That Accelerate Payback

  • Enbridge Home Efficiency Rebate+: Rebates available on qualifying 96%+ AFUE furnace upgrades for Enbridge gas customers β€” Hamilton's primary gas utility; 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 β€” 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 β€” look for it when comparing equipment
  • Stacking Enbridge + federal rebates is permitted β€” some Hamilton homeowners have received $1,500–$7,500+ in total incentives on furnace replacement projects

Frequently Asked Questions

My Enbridge bill is $3,000/year. How much of that is heating vs. other gas uses?

For a typical Hamilton home, roughly 65–75% of annual Enbridge gas consumption goes to space heating, 15–20% to domestic hot water, and 5–10% to cooking or other appliances. On a $3,000 annual bill, that’s approximately $1,950–$2,250 in heating gas costs. That’s the number your furnace efficiency acts on β€” the hot water heater runs at its own efficiency and is unaffected by furnace replacement. The calculator uses this split to isolate furnace-specific savings.

Yes β€” three ways. First, check the yellow EnerGuide label on the furnace itself. Second, look at the model number and search the AHRI certified products directory (ahridirectory.org). Third, use the installation year as a proxy: furnaces installed before 1992 in Canada are likely 60–72% AFUE; 1992–2009 installs are typically 78–80% AFUE; post-2009 standard installations are 80% AFUE; anything sold as high-efficiency from 2006 onward is 92–96%.

Almost never purely for the efficiency gain. The savings between 96% and 98% AFUE on a typical Hamilton gas bill run $35–$65 per year β€” and the premium for a 98% unit is typically $800–$1,500 over a 96% equivalent. That’s a 15–40 year payback from efficiency savings alone, which exceeds the equipment’s expected lifespan. Where a 98% AFUE unit can make sense is when the variable-speed blower (which is how most 98% units achieve that rating) meaningfully improves comfort in a home with temperature variation problems. Buy for the comfort feature, not the 2% efficiency gain.

πŸ’° Enbridge Rebates

Up to $1,000

Enbridge rebates on 96% AFUE upgrades β€” ask us what’s currently available

1-289-778-3090

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