Furnace installation in Ottawa
Replacing or installing a furnace in Ottawa: what drives the price, which rebates apply, and who signs off on the work.
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Get a furnace quoteWhat a new furnace costs in Ottawa
A furnace replacement in Ottawa is priced mainly by three things: the efficiency rating you choose, whether the existing ductwork can be reused as is, and how the unit vents outside. A mid efficiency furnace often reuses an existing masonry flue, while a high efficiency condensing model exhausts through PVC pipe run out a side wall, a mechanical change a quote should itemize rather than bury inside one number. Homes converting from an older unit sometimes need duct modifications too, particularly where a previous owner extended the system into a finished basement or an addition without upsizing the trunk line feeding it. Ask an Ottawa contractor for a breakdown that separates the furnace itself from venting work, the electrical hookup, a new thermostat, and haul away of the old unit, because a single bundled figure hides which of those line items is actually driving your total. Getting quotes from more than one licensed contractor remains the most reliable way to see what a fair number looks like for your specific house, rather than trusting a single citywide estimate that may not describe the job sitting in front of you.
Rebates that apply here
Ontario's Home Renovation Savings Program, run by Save on Energy and checked against the program's page in September 2026, lists four eligible measures: an air source heat pump paying up to $7,500, a ground source heat pump paying up to $12,000, insulation paying up to $7,700, and windows at $100 per opening. A direct, like for like gas furnace swap is not on that list, so replacing one furnace with a newer furnace does not by itself draw provincial rebate money. That is true even though the program excludes nobody: it carries no income test and stays open to homeowners on every heating fuel, gas included, meaning an Ottawa household burning natural gas today can still apply, just not for a furnace line item that does not exist. Two things follow from that gap. Insulation and window work done alongside a furnace project stays eligible on its own even though the furnace itself does not qualify. And a homeowner weighing a furnace against a heat pump replacement should know the heat pump route can unlock up to $7,500 under this program, the exact amount set by the specific system installed rather than a flat payment, while the furnace route unlocks nothing from this particular program. Federally, the Canada Greener Homes Grant, checked against the same September 2026 date, stopped taking new applications in February 2024, and its own measures, back when it was open, never included furnaces either, only heat pumps, insulation and windows.
Climate and sizing
Ottawa's climate is humid continental, with long winters and short, sticky summers, and a furnace serving the city has to be sized against real sustained cold rather than a mild coastal low. Overnight lows can fall well below minus twenty Celsius during January and February, in keeping with a humid continental winter, and a correctly matched furnace has to carry the house through those cold spells without short cycling or falling short on the coldest night of the season, which is why a proper heat loss calculation matters more than the BTU figure printed on a brochure. The city's housing stock also shapes the job. Single detached properties make up close to 42 percent of Ottawa's occupied dwellings according to the census, typically with a full basement a forced air furnace and its ductwork run through, and row houses add roughly another 21 percent, where shared party walls and narrower footprints often mean tighter duct runs and less clearance around the unit. High rise buildings of five storeys or more account for close to 19 percent of dwellings, and low rise buildings under five storeys add roughly 11 percent more; both depend on building level heating decisions rather than an individual owner swapping equipment directly. Semi detached houses make up the remaining 5 percent or so, generally still allowing an individual furnace while sharing a wall and sometimes a mechanical chase with next door.
Local permits and utility
Furnace work in Ottawa runs through two separate approval tracks, and mixing them up is a common source of confusion for homeowners. Structural or venting changes tied to the house itself fall to the City of Ottawa, the municipality's building permit authority. Gas fired equipment is handled elsewhere: Ontario puts fuel burning appliances and their piping under the Technical Standards and Safety Authority, and the physical installation has to be carried out by a licensed gas technician following the CSA B149.1 installation code, not simply whoever shows up with a van. The gas itself arrives courtesy of Enbridge Gas, formed from the 2019 merger of Enbridge Gas Distribution and Union Gas and now serving most of Ontario including the capital region; that is the utility to call about supply, metering, or a suspected leak, and it has no connection to the electric side of an Ottawa home's utility bills. A contractor worth hiring pulls the building permit, coordinates the TSSA licensed gas work, and books whatever inspection the job needs, rather than leaving a homeowner to chase down each approval alone, and asking who handles which step before signing is a fair question for any Ottawa quote.
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