Key takeaways
- Published central-air prices run from $3,199 to $8,500 and up across four GTA firms; the most GTA-specific single figure, HVAC Market's, is $3,200 to $5,500 installed for a mid-efficiency 2.5-ton system in an average-sized home. A ductless mini-split is $3,000 to $5,000 per zone, a cold-climate heat pump $5,000 to $14,000 before rebates.
- No Ontario rebate covers a standalone air conditioner. The Home Renovation Savings Program pays $500 per ton up to $2,000 to an Enbridge Gas customer heating with natural gas, and $1,250 per ton up to $7,500 to a home heated with electricity, oil, propane or wood, but only for a heat pump, and only with pre-approval.
- Toronto lists 'the installation of additional cooling systems … in a house' as work that does not require a building permit, but calls that list non-exhaustive, says Zoning Bylaw compliance still applies, and names 'Install or modify heating and or plumbing systems' on its permit-required list, so a heat pump or duct change is a question for Toronto Building rather than an assumption. The unavoidable fee is electrical: ESA says almost all electrical work needs a notification, with a $92 minimum since April 1, 2026, but a contractor job limited to equipment such as an AC is a $40 flat fee. Mississauga requires a permit for an HVAC system outright.
- Enercare publishes both sides of the rent-versus-buy question: a rental starting at $72 a month and a purchase starting at $4,295 installed. That is 12 × $72 = $864 a year, so the purchase pays for itself in just under five years, or just over at the $67 rate the same site also advertises.
- Natural Resources Canada says design loads follow 'building envelope characteristics', not floor area, and cites HRAI design training for a sizing band of 80 to 125 per cent of the design cooling load. Its 'match to the high end' instruction belongs to the balanced heating-and-cooling option, not the cooling-first one an AC buyer is on.
Four GTA HVAC firms publish prices for central air. They run from $3,199 to $8,500 and up. That is the spread between companies, not a quote for your house. The most GTA-specific figure comes from HVAC Market. For "an average-sized home in the Greater Toronto Area", it says a mid-efficiency 2.5-ton system "usually ranges from $3,200 to $5,500, including installation". A ductless mini-split (a wall unit that needs no ducts) runs $3,000 to $5,000 per zone. A cold-climate heat pump cools in exactly the same way and costs $5,000 to $14,000 before rebates. It is also the only one of the three that any Ontario rebate pays toward. Floor area is not what sets the size you need. Natural Resources Canada works the size out from a load analysis "based on building envelope characteristics", meaning the shell of the house. Its two sample homes land a third of a ton apart.
What each company publishes for an installed AC
Each figure is the price that company puts on its own site. We read them all on 25 August 2026, and Alliance's ductless figure on 29 September 2026. Alliance Energy Source gives its bands for Toronto, North York, Richmond Hill and Markham.
| Item | Low | High | Unit |
|---|---|---|---|
| Central AC, 2–3 ton at 16 SEER2, all-in (Megacity HVAC) | $3,500 | $6,500 | installed |
| 1.5–2 ton unit (Alliance Energy Source) | $3,500 | $4,800 | installed |
| 2.5–3 ton unit (Alliance Energy Source) | $4,500 | $6,500 | installed |
| 3.5–5 ton unit (Alliance Energy Source, quoted as "$8,500+") | $6,500 | $8,500 | installed, top end open |
| 2.5 ton, 1,500–1,800 sq ft (HVAC Market) | $3,199 | $6,000 | installed |
| Central AC, most Toronto homes (Canada Energy Solution) | $3,500 | $7,500 | installed |
| Ductless mini-split (Alliance Energy Source) | $3,000 | $5,000 | per zone, installed |
| New high-efficiency AC, "on average" (Enercare) | $3,995 | $6,000 | installed |
| New high-efficiency **central** AC **in Ontario** (Enercare) | $3,500 | $6,000 | installed |
| Central AC, what most homeowners spend (Reliance, Canada-wide) | $5,500 | $9,000 | installed |
| Cold-climate air-source heat pump, before rebate (Megacity HVAC) | $5,000 | $14,000 | installed |
The spread inside a single size band is huge. HVAC Market's 2.5-ton box runs $3,199 to $6,000. Alliance leaves its top end open at "$8,500+". The rental firms are no tighter. Reliance frames $5,500 to $12,000 as a Canada-wide figure. Enercare's one page gives two answers. One says "on average, a new high-efficiency air conditioner costs $3,995 to $6,000". The other says "a new high-efficiency central air conditioner in Ontario usually costs $3,500 to $6,000". The narrower question gets the lower floor: $3,995 − $3,500 = $495 below the general one. Get three quotes.
What the size actually depends on
Not square footage. Natural Resources Canada's Air-Source Heat Pump Sizing and Selection Guide.pdf) calls the method a load analysis. It "determines design loads based on building envelope characteristics", which means the shell of the house: walls, windows, insulation and air leaks. Its two sample homes show why that matters. A new three-storey ENERGY STAR townhome has a design cooling load of 19,200 Btu/h. An older two-storey house, after a full upgrade to that shell, sits at 23,519 Btu/h, labelled 2.0 tons. That label fixes the math at 12,000 Btu/h per ton. So the gap is 23,519 − 19,200 = 4,319 Btu/h, about a third of a ton. Neither house has a floor area published at all.
Be clear about how far that rule reaches. NRCan says codes require capacities to be set under CSA F280 (the Canadian standard for sizing home heating and cooling) "for all new residential construction". It "can also be used" on older houses that have had big upgrades to the shell. An ordinary AC swap in an older GTA house is neither of those. F280 is the benchmark there, not a rule you break by skipping it.
Read the band the way the source writes it. NRCan's target is 80 to 125 per cent of the design cooling load. It credits that band to HRAI design training "often referenced in Building Codes". The whole band stands for a cooling job. The "match cooling output to the high end" line belongs to Option 4B, which is balanced heating and cooling. Option 4A, emphasis on cooling, is the one an AC buyer is on, and it says only "match output to target". NRCan does add one thing about working backwards from an existing unit. It says "to prevent undercooling and client call-backs, it is common field practice to size cooling appliance output at between 100% and 125% of DCL". DCL is the design cooling load. Going too big is not free headroom either. Megacity HVAC says oversized units "short-cycle and leave your home clammy".
Two physical limits cap the size, and NRCan names both. The first is "the maximum airflow capacity of the existing supply ducts". In its sample house that is an 8-by-22-inch trunk plus two 6-inch round ducts, or 1,453 CFM of air. The second is "the available breaker rating in the main electrical panel". Ask for the calculation in writing.
The heat-pump alternative, and why it changes the arithmetic
A cold-climate air-source heat pump cools the way an air conditioner does and heats as well. It costs more up front. Megacity HVAC publishes $5,000 to $14,000 before rebate, and $7,500 to $10,000 for a 3-ton system on ducts you already have. Reliance lists a central heat pump at $6,999 and up against $5,499 and up for central AC. The rebate closes part of that gap, and how much depends on the fuel you heat with. Here is the Home Renovation Savings Program's rebate page in plain terms:
- Electricity, oil, propane or wood heat: $1,250 per ton, up to $7,500. It takes six tons to reach that cap. A three-ton job returns 3 × $1,250 = $3,750.
- Enbridge Gas customer on natural gas: $500 per ton, up to $2,000. Four tons caps it. Three tons returns 3 × $500 = $1,500.
Quotes gloss over three details. First, the rebate is "calculated based on the minimum rated heating capacity at 8.3C (47F)". So rebate tons are heating tons, not the cooling tonnage on the box. Second, pre-approval is a must: "installations done before approval are not eligible". The unit has to be on NRCan's qualified products list, and your installer has to be registered and listed as a participating contractor before the install. New firms can join: the program says "New contractor registration is now open". Third, the permit answer is not the same as an AC's. A heat pump heats, and Toronto's permit-required list names "Install or modify heating and or plumbing systems". The only heating item on the exempt list is "Replacing a furnace or boiler in a house". Ask Toronto Building first.
Rent or buy
Enercare publishes both halves, so you can check the math yourself. A purchase is "starting from $4,295 including standard installation". A rental is "starting from $72 per month". The sums below use $72 because Enercare pairs it with $4,295 in its own buy-versus-rent table. Its "as low as $67 per month" line elsewhere on the site moves the answer.
- A year of rent: 12 × $72 = $864. At the cheaper rate it is 12 × $67 = $804.
- Break-even: $4,295 ÷ $864 = just under five years. At the cheaper rate $4,295 ÷ $804 = 5.34 years, just over.
- Over a 15-year life (Reliance puts central AC at "15 years or longer"), renting costs 180 × $72 = $12,960. Buying costs $4,295. The gap is $12,960 − $4,295 = $8,665. That assumes the rate holds for 180 months in a row, which Enercare does not promise. Its AC pages publish a starting rate, not a cap.
Renting does buy away repair risk, and Enercare prices that itself. A faulty AC fan motor is $731.00 + tax on equipment you own ($697, plus $317 for a fan blade, on its rental page). It is $0.00 on equipment you rent. Three motors at 3 × $731 = $2,193 still do not close an $8,665 gap. Rent if a four-figure surprise would be a real problem for you, not because the total is lower.
If you already rent, the buy-out is a share of the original Total Installed Cost. The schedule runs 61 per cent at 10 to under 11 years, 43 per cent at 12 to under 13, 5 per cent at 15 and older. Take Enercare's own $4,295 starting price. A 10-year-old unit costs 0.61 × $4,295 = $2,619.95 to buy out, and by then you have paid 120 × $72 = $8,640 in rent. At 15 years it is 0.05 × $4,295 = $214.75. Treat those as illustrations. Enercare calls the schedule "a sample version … for reference only", taxes are extra, and your real figure sits on page one of your agreement.
Renting a heat pump cuts the rebate, unless you heat with gas
The Home Renovation Savings Program pays a rented cold-climate air-source heat pump $500 per ton, up to $2,000, whatever fuel you heat with. A gas-heated household loses nothing by renting: $500 per ton either way. An electrically heated one does lose. At three tons, buying returns 3 × $1,250 = $3,750 against 3 × $500 = $1,500 rented. The difference is $3,750 − $1,500 = $2,250. The $7,500 − $2,000 = $5,500 gap people quote turns up only at six tons, where both caps bind. And rebate tons are heating tons, so six tons is further off than a nameplate suggests.
Rebates and financing that exist for cooling
No Ontario rebate covers a standalone air conditioner. Save on Energy's Home Renovation Savings list covers heat pumps, ground-source systems, heat pump water heaters, windows and doors, insulation, air sealing, thermostats, solar and appliances. Central air is not on it.
Toronto will lend you the money, which is not the same thing. The City's Home Energy Loan Program names "high-efficiency furnaces/boilers/air conditioners" on its eligible list. You pay it back on your property tax bill at 4.46 per cent over 15 years, a rate fixed until 30 September 2026. The cap is $125,000 or 10 per cent of your property's current value assessment, "whichever is less". Current value assessment is the assessed value of your home, and on most Toronto houses that second test is the one that bites. Any job that is not heat-pump-only or solar-only also needs an EnerGuide assessment, which is a home energy audit.
The line items that inflate a quote
Megacity HVAC is the only firm here that splits the bill into parts: equipment $1,800 to $4,500 and labour $1,000 to $1,800, against a typical total of $3,500 to $6,500. So the box itself is roughly half the bill ($1,800 of a $3,500 job, $4,500 of a $6,500 one). Everything below is where quotes pull apart.
The add-ons that blow a quote up are structural:
- Ductwork. Canada Energy Solution: minor sealing $200 to $600, modifications $500 to $2,000, full replacement in a detached home $5,000 to $15,000. This is where the cooling exemption stops being simple. Toronto lists "Install or modify heating and or plumbing systems" as permit-required, calls its exempt list "not exhaustive" and asks for Zoning Bylaw compliance either way. Price duct work after a call to Toronto Building.
- Electrical. A dedicated circuit $300 to $700, a 100-amp to 200-amp panel upgrade $2,000 to $4,500 (Canada Energy Solution).
- First install, not a replacement. HVAC Market says a new installation "may require adding a coil inside the furnace, refrigerant lines, and sometimes even electrical panel upgrades", which is why replacing an existing AC is usually cheaper.
- Small stuff (Canada Energy Solution). Condensate drain line $100 to $300, long line-set run $200 to $500, licensed refrigerant recovery $150 to $400.
Check which permit the line is for
Two of the companies cited here carry a Toronto permit line between $150 and $400. The City's own list of work that does not require a building permit includes "the installation of additional cooling systems … in a house". Two caveats come with it. The list is "not exhaustive and judgment should be used", and "even if a building permit is not required, compliance with the Zoning Bylaw is required". The permit-required list on the same page names "Install or modify heating and or plumbing systems". So a heat pump or a duct change is a question for Toronto Building, not something to assume. The fee you cannot dodge is the electrical one. ESA says "almost all electrical work requires filing a notification of work" and "you must file a notification of work before starting electrical work". Your contractor files it. ESA's 2026 residential fee reference sets the minimum fee at $92. A job limited to equipment such as an air conditioner or a furnace is a $40 flat fee instead, for the HVAC installer or the licensed electrical contractor. ESA's FAQ page still says $88; the fee reference, dated as of April 1, 2026, says $92.
Frequently asked questions
What size air conditioner do I need?
The size a load calculation gives you, not the size a square-footage chart gives you. NRCan sets loads "based on building envelope characteristics", which means the shell of the house. The 80 to 125 per cent band it quotes comes from HRAI design training, not from CSA F280. Check that your ducts and your breaker panel can carry the answer.
Is a heat pump cheaper than an air conditioner after rebates?
Sometimes, and only if you do not heat with gas. Megacity HVAC publishes $7,500 to $10,000 for a 3-ton cold-climate heat pump on ducts you already have. Electric, oil, propane or wood heat earns $1,250 per ton: 3 × $1,250 = $3,750 back. An Enbridge Gas customer earns $500 per ton: 3 × $500 = $1,500.
Do I need a permit to install air conditioning in Toronto?
To add AC to a house, no. The City lists "the installation of additional cooling systems … in a house" among work that does not require one. It also calls that list "not exhaustive" and says Zoning Bylaw compliance still applies. This is not a blanket pass for HVAC work. "Install or modify heating and or plumbing systems" sits on the permit-required list, so a heat pump or a duct change means a call to Toronto Building. The electrical side always goes through ESA: a $40 flat fee when a contractor's job is limited to equipment such as the AC, and a $92 minimum otherwise. Mississauga requires a permit for an HVAC system outright.
Sources (18)
- Home Renovation Savings Program · Save on Energy (Independent Electricity System Operator) (retrieved )
- Home Renovation Savings: Heat pumps (rebate amounts and eligibility) · Enbridge Gas and Save on Energy (retrieved )
- Air-Source Heat Pump Sizing and Selection Guide (Version 1.0) · Natural Resources Canada (retrieved )
- When Do I Need a Building Permit? · City of Toronto (retrieved )
- Home Energy Loan Program (HELP) · City of Toronto (retrieved )
- When a building permit is required · City of Mississauga (retrieved )
- How much does an electrical notification cost? · Electrical Safety Authority (retrieved )
- Notifications and Inspections (when a notification of work is required) · Electrical Safety Authority (retrieved )
- 2026 Residential Fees Quick Reference Guide (as of April 1, 2026) · Electrical Safety Authority (retrieved )
- How Much Does AC Installation Cost in Toronto in 2026? · Megacity HVAC (retrieved )
- How Much Does a Heat Pump Cost in Toronto in 2026? · Megacity HVAC (retrieved )
- Air Conditioner Installation Cost In Toronto: Real Price Ranges · HVAC Market (retrieved )
- How Much Is Air Conditioning Installation in Toronto, Richmond Hill, Markham & North York? · Alliance Energy Source (retrieved )
- 2026 Central AC Installation Cost In Toronto: Full Price Breakdown · Canada Energy Solution (retrieved )
- Air Conditioner Rental (buy-versus-rent comparison table) · Enercare (retrieved )
- Buy a New Central Air Conditioner in Ontario · Enercare (retrieved )
- Support: Enercare Advantage Heating and Cooling (rental HVAC buy-out schedule, repair estimates) · Enercare (retrieved )
- Rent or Buy an Air Conditioner · Reliance Home Comfort (retrieved )
How this guide was made
Checked on August 25, 2026 against four GTA HVAC companies that publish installed prices and the AC pages of Enercare and Reliance, including Enercare's rental buy-out schedule; plus eight official pages read in full: the Save on Energy Home Renovation Savings upgrade list, the program's own heat-pump rebate page, Natural Resources Canada's Air-Source Heat Pump Sizing and Selection Guide, both of the City of Toronto's building-permit lists and its Home Energy Loan Program, the City of Mississauga's permit list, and both Electrical Safety Authority pages covering when a notification is required and what it costs. The ESA fees were re-checked against ESA's 2026 Residential Fees Quick Reference Guide, and Alliance Energy Source's ductless price read, on September 29, 2026.
