Quick answer
Buy if you can pay cash or qualify for financing; rent only if neither is possible. A furnace rental in Ontario commonly runs 10 to 15 years with a rate that rises every year, so the total of payments normally lands well above the $4,500–$7,500 a high-efficiency furnace costs installed. Financing spreads the same cost and ends with you owning the furnace.
Whether to rent or buy a furnace in Ontario is a question you can settle with a calculator and the rental offer in front of you. Renting gets a furnace installed with nothing down and repairs included. Buying, outright or on a loan, costs less whenever the total of rental payments exceeds the installed price, and the arithmetic below shows you which side of that line an offer falls on.
How a furnace rental contract works in Ontario
- Term: commonly 10 to 15 years, close to the working life of the furnace. It is a fixed-term contract, not a month-to-month arrangement.
- Annual escalator: the monthly rate rises each year by a percentage written into the contract. At 3 per cent a year, the payment in year 15 is about 50 per cent higher than in year one.
- Buyout schedule: ending early means paying a buyout taken from a table in the contract, built on the payments remaining and not on what a used furnace is worth.
- Service: repairs, and usually maintenance, are included and performed by the rental company's technicians on the rental company's schedule.
- House sale: the contract does not end when you sell. Either the buyer agrees to assume it or you pay the buyout on closing; see what happens to a furnace rental contract when you sell.
Ownership at the end of the term varies. Some contracts transfer the furnace to you after the last payment; others leave it as the company's equipment for as long as you keep paying. Find that clause before you read anything else.
The total-of-payments comparison, step by step
- Step 1: take the monthly rental rate and multiply by 12 to get the first-year cost.
- Step 2: apply the term and the escalator. With a 3 per cent annual increase over 15 years, multiply the first-year cost by about 18.6 instead of 15.
- Step 3: compare with buying. A high-efficiency gas furnace costs $4,500–$7,500 installed, in writing, with the old unit removed.
- Step 4: compare with financing. A $5,000 furnace financed over 10 years lands near $60–$75 a month depending on the rate, and the payments stop.
- Step 5: credit the rental for what it includes. Most furnace repairs cost $150–$800, and a new furnace has manufacturer parts coverage in its early years, so add a realistic repair allowance to the purchase side.
The decision rule: if the rental total from step 2 is higher than the financed total for the same furnace plus a repair allowance, renting costs you the difference. Ask the rental company to write the sum of all payments over the full term on the offer. An offer that only ever quotes the monthly figure is hiding the number that matters.
Monthly payment maths for a purchase is laid out in what a furnace costs per month financed.
Who renting a furnace suits, and who it does not
Renting fits a narrow group. It can be the right call in these situations:
- You cannot pay cash and have been declined for financing, and the furnace has failed in winter.
- You are a landlord who wants repairs bundled into one monthly charge with no service calls to arrange, and the term matches how long you plan to hold the property.
It is the wrong tool in these situations:
- You qualify for HVAC financing: the monthly payment is comparable, there is no escalator, and it ends.
- You expect to sell within the term: the buyout comes due on closing or becomes a bargaining point with the buyer.
- You want to choose who services the furnace, or you may add a heat pump later and do not want a buyout standing in the way.
- You were offered the rental at your door. Ontario has banned unsolicited door-to-door furnace sales and rentals since 1 March 2018.
Do rebates change the rent-or-buy answer?
No. No current Ontario program pays a rebate on a gas furnace by itself, rented or bought, so a rebate is never a reason to choose one over the other. Heat pump rebates under the Home Renovation Savings Program go to the homeowner who applies for equipment installed by a participating contractor, with approval before the install. If a rental offer mentions a rebate, ask which program and read its page yourself; the current list is on our rebates hub.
Check whether the current furnace is already rented, and who would service a new one
In newer subdivisions some builders arrange rental heating equipment, and a resale buyer can assume a rental without noticing it in the paperwork. Check your gas bill and your closing documents for a rental charge before pricing a replacement. Replacing a furnace you do not own means dealing with the rental company first.
On propane-heated rural lots in Caledon, Campbellville and Flamborough, confirm that any rental covers a propane-converted furnace and who services it that far out. A purchased furnace can be serviced by any TSSA-licensed contractor you choose.
ZK Mechanical quotes furnaces in writing with the financed monthly payment beside the purchase price, so you can set it against a rental offer line by line. Financing runs through lending partners with no prepayment penalty. See furnace installation for what the price includes, or ask for a free quote.