Furnace Operating Cost Calculator

Furnace operating cost calculator estimates what your furnace costs to run each month and year,
based on your AFUE rating, home size, and current natural gas rates in your province.
⚡ Monthly & Annual Costs
🇨🇦 Provincial Gas Rates
📊 Compare Models
🔥

Furnace Operating Cost Calculator

Calculate the estimated monthly operating cost of your furnace with this quick quiz.

What is the efficiency of your furnace? (AFUE)

AFUE = Annual Fuel Utilization Efficiency. Standard furnaces are ~80–85%, high-efficiency models are 95–98%.

85%
75% (Standard)98% (High-Efficiency)
What is the size of your home?
How well insulated is your home?

Better insulation = your furnace works less = lower monthly cost.

What is your region / climate zone?

Colder climates mean your furnace runs far more hours per heating season.

What is your gas rate?

Check your gas bill for the rate per cubic metre (m³). Average is around $1.20/m³.

$1.20 /m³
$0.50 /m³$2.00 /m³
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Our certified partners can quote a newer high-efficiency furnace that could cut your costs significantly.

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Your Furnace Operating Cost Estimate
Approximate Monthly Cost
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Annual Estimate
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Furnace Efficiency
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Gas Rate
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Home Size Factor
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Important: This is a general estimate for informational purposes only. Your actual operating costs may vary based on thermostat settings, furnace age, local climate, and usage patterns.

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How Much Does It Cost to Run a Furnace in Canada?

The average Canadian household spends $1,200 to $2,800 per year see our full furnace buying guide for context. depending on home size, furnace cost in Canada, climate zone, and how well the home is insulated. Monthly heating costs during peak winter months (December–February) can reach $200–$450 for an average 1,800 sq ft Canadian home.
Home SizeOld 80% AFUENew 95% AFUEAnnual Savings
Under 1,000 sq ft$900 – $1,200/yr$750 – $1,000/yr~$150/yr
1,000 – 1,800 sq ft$1,400 – $1,900/yr$1,100 – $1,500/yr~$300/yr
1,800 – 2,500 sq ft$1,800 – $2,400/yr$1,450 – $1,950/yr~$400/yr
2,500+ sq ft$2,400 – $3,200/yr$1,900 – $2,600/yr~$550/yr

Natural Gas Rates Across Canada

Natural gas is priced differently across provinces see full furnace prices in Ontario. Your local rate directly affects your operating costs — use your actual utility bill rate for the most accurate calculation.
ProvinceAvg. Gas Rate (per GJ)Avg. Annual Heating Cost
Ontario$12–$16/GJ$1,300 – $2,200
Alberta$8–$14/GJ$1,100 – $1,900
British Columbia$11–$15/GJ$900 – $1,600
Quebec$10–$14/GJ$1,000 – $1,800
Saskatchewan$9–$13/GJ$1,200 – $2,000

Tips to Reduce Your Furnace Operating Costs

🌡️ Smart Thermostat
Installing a smart thermostat saves an average of 10–15% on heating bills. by automatically reducing heat when you're asleep or away.
🔧 Annual Tune-Up
A professional furnace tune-up ($100–$200) ensures your system runs at peak efficiency. A dirty filter alone can increase operating costs by 5–10% — check our furnace rebates in Ontario guide for savings on a replacement.
🏗️ Improve Insulation
Air sealing and attic insulation upgrades often deliver better return-on-investment than furnace replacement. reducing heat loss by 20–40%.
🔄 Replace Filters Regularly
Replace your furnace filter every 1–3 months during heating season. A clogged filter forces the furnace to work harder and increases gas consumption.

Frequently Asked Questions

How do I calculate my furnace operating cost?

Divide furnace BTU/h by AFUE, multiply by daily run hours and your gas rate per BTU — this calculator does it instantly.

Today's high-efficiency furnace technology top residential gas furnaces reach 98–98.7% AFUE, led by models like the Lennox SLP99V, Carrier Infinity 98, and Trane XV95. guide to the best furnace brands in Canada.

A dirty filter, wrong-sized furnace, duct leaks, poor insulation, or an aging system are the most common causes of a spike.

Rebates Available
Home Renovation Savings (HRS)
$5,000
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