💰 Conversion Cost
⏳ Payback Period
Comparison Breakdown
Full Calculation Table
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How to Use the Fuel Switching Cost Calculator
Choose the fuel currently heating the home.
Choose the fuel type being considered as a replacement, including an electric heat pump as an option.
Enter the current annual cost of heating with the existing fuel, from recent utility or delivery bills.
Click Compare Fuel Switch Cost to see conversion cost, new estimated annual cost, and payback period.
What Fuel Switching Actually Involves
Switching heating fuel type means more than swapping one furnace or boiler for another. It typically means bringing an entirely different energy source to the mechanical room, which can involve running a new gas line, installing a propane tank, removing an old oil tank, or upgrading electrical service, and an electrical upgrade is worth sizing early with the service entrance calculator. These supply-side costs, separate from the heating equipment itself, are often the part homeowners underestimate most.
Why Relative Fuel Cost Matters So Much
The financial case for switching fuels comes down to comparing the ongoing cost per unit of heat delivered between the current and proposed fuel, adjusted for the efficiency of the equipment on each side. Natural gas has historically been one of the least expensive heating fuels per unit of delivered heat in much of Canada where it's available, while propane and oil tend to cost far more, and electric resistance heating is expensive unless paired with a heat pump's efficiency advantage. This calculator uses planning ratios for the cost of one unit of delivered heat, with natural gas at 1.00, propane at 3.0, oil at 3.5, electric resistance at 2.8, and a cold-climate heat pump at 1.00. They assume typical Canadian residential prices, so treat them as a national middle ground and test your own local rates with the fuel cost comparison calculator. At the default $1,800 oil bill, the same heat would cost about $514 on natural gas, $1,543 on propane, and $1,440 on electric resistance.
Heat Pumps Change the Comparison
A cold-climate heat pump moves heat rather than generating it directly, which lets it deliver more heat energy than the electrical energy it consumes, unlike electric resistance heating which converts electricity to heat roughly one-to-one. Natural Resources Canada's testing at the Canadian Centre for Housing Technology measured a heating COP of 1.5 at about -21°C and 3.0 at about +5°C, and concluded that cold-climate heat pumps save money against electric baseboards or fuel oil, but cost more to run where natural gas is cheap. That is why this calculator treats a heat pump as roughly equal to natural gas on running cost, so a switch from oil, propane, or electric resistance shows large savings while a switch from natural gas does not.
When Gas Isn't Already at the Property
Where natural gas service doesn't already reach the property, bringing it in, including any utility connection fees and the line running to the home, can dwarf the cost of the heating equipment itself. This is a critical factor to confirm before assuming a switch to gas heating will be straightforward or affordable.
Non-Financial Reasons to Switch
Cost isn't the only driver. Removing an aging oil tank can reduce leak and spill risk, though Ontario's fuels regulator notes that an approved aboveground tank has no set replacement age as long as it isn't leaking, while a buried tank can leak undetected for years and an unused underground tank must be removed. Switching away from propane removes dependency on delivery scheduling, and moving to a heat pump can align with broader efficiency or environmental goals even when the payback period is long. Pair this calculator's cost comparison with the heat pump vs furnace cost calculator and the utility rebate calculator for a fuller picture.
Frequently Asked Questions
Beyond the heating equipment itself, fuel switching often involves bringing a new fuel supply to the mechanical room, which can mean a new gas line connection, a propane tank installation, an oil tank removal, or an electrical service upgrade, depending on the fuels involved. These supply-side costs vary widely and are frequently underestimated compared to the equipment cost alone.
Where natural gas service is already available at the property line, it often is. In this calculator a home spending $1,800 a year on oil would spend about $514 on natural gas, saving roughly $1,286 a year, and the $4,500 conversion cost pays back in about 3.5 years. Switching also removes on-site fuel storage and tank maintenance. Where gas service is not available nearby, bringing it to the property can be the single largest cost in the whole project.
Yes, moving from a combustion fuel like gas, propane, or oil to an electric heat pump is a form of fuel switching, even though a heat pump does not burn fuel on-site. The comparison still involves conversion cost, including the new equipment and any electrical service upgrades, against ongoing operating cost differences. Savings are largest against oil, propane, and electric baseboard heat, and smallest or nonexistent against low-cost natural gas.
Payback period varies enormously depending on the specific fuels involved, current and projected fuel prices, and how much the conversion itself costs. At the default $1,800 oil bill, switching to a cold-climate heat pump with this calculator's $7,500 conversion cost pays back in about 5.8 years, while the same heat pump replacing natural gas does not lower the bill at all. A switch requiring extensive new fuel supply infrastructure may take considerably longer or may be driven by factors other than pure cost savings.
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