How to Choose an HVAC Company in Mississauga

What a licensed HVAC company in Mississauga must have

Four pieces of paper separate a real HVAC contractor from a guy with a van. Ask for all of them and check them yourself.

TSSA fuels contractor registration. Any company that connects, services or removes a gas furnace, boiler or water heater in Ontario must be registered as a fuels contractor with the Technical Standards and Safety Authority, and the person doing the gas work must hold a TSSA gas technician certificate. Ask for the contractor registration number and the technician's certificate, and confirm both through TSSA's public lookup.

Licensed refrigeration technicians. Charging, recovering or repairing the refrigerant circuit on an air conditioner or heat pump is work for a licensed refrigeration and air conditioning systems mechanic (the 313A trade in Ontario) or an apprentice working under one, plus an Ozone Depletion Prevention card for handling refrigerant. If the company cannot name the licence, nobody from it should be opening your refrigerant lines.

ESA licence for electrical work. A heat pump needs a dedicated 240V circuit, and an electric air handler needs more than that. The wiring must be done by a licensed electrical contractor with an ECRA/ESA licence number, and the work needs an Electrical Safety Authority permit (called a notification of work) and an inspection. A company that says the heat pump just plugs into the furnace outlet is a company to walk away from.

WSIB and liability insurance. Ask for a WSIB clearance certificate, which you can confirm on the WSIB website, and a certificate of liability insurance in the company's name. Without them, an injury on your property can land on you.

The 7 questions to ask before you sign

Every one of these has a right answer. Write down what each company says; the differences are where your money goes.

1. Can I have the quote in writing, with model numbers? A quote that says "high-efficiency furnace" without a model number lets the installer fit whatever is on the shelf that week. Insist on the exact model for the furnace, heat pump, air handler, coil and thermostat, plus the AFUE, HSPF2 or SEER2 rating of each.
2. Who actually does the install? Employees or subcontractors? Who holds the TSSA and refrigeration certificates on the day? Will the person who quoted be reachable if the crew hits a problem?
3. Which permits does this job need, and who pulls them? The gas side runs under the contractor's TSSA registration. The electrical side needs an ESA notification and inspection. If a company says no permits are needed for a heat pump, it is wrong about the electrical, and that tells you something.
4. How did you size it? The only honest answer is a heat-loss and heat-gain calculation (Manual J or the CSA equivalent) done from your home's measurements, windows and insulation. "Same as the old one" is how a 1975 bungalow in Clarkson ends up with a furnace twice the size it needs.
5. Who registers the warranty, and what does the labour side cover? Manufacturer parts warranties usually require registration within a set time after the install, and annual maintenance to stay valid. Ask who files it, how many years of parts, how many years of labour, and what voids it.
6. Will you handle rebate pre-approval before the install? The Home Renovation Savings Program requires pre-approval before installation and a heat pump from NRCan's qualified list. A company that installs first and promises to sort the rebate afterwards has cost you the rebate.
7. What happens if the price changes? Ask what is in the agreed scope, what is not, and what happens if the crew finds a rotten chimney liner or a full electrical panel. The answer you want is a guaranteed price for the agreed scope and a written change order, signed by you, for anything outside it.

Red flags that should end the conversation

Some of these are sloppy. Some are how Mississauga homeowners end up renting a furnace they could have bought outright. Either way, get another quote.

• A firm price over the phone without a visit. Nobody can size a system for a Mineola two-storey from the street address. A phone number is a guess that turns into an extra on install day.
• "This price is only good today." Equipment prices do not change overnight. Pressure to sign on the spot exists so you do not compare.
• No permit, or "we don't bother with ESA for heat pumps." An unpermitted 240V circuit can be a problem for your home insurance and will surface when you sell the house.
• A push to rent instead of buy. Rental HVAC contracts in Ontario typically run for many years, can register a notice against your property title, and add up to far more than the purchase price. Ask for the buyout schedule and read the exit terms twice.
• Cash only, or a big discount for cash. No invoice means no warranty claim, no proof for a rebate and no recourse.
• No model numbers. See question one above. If the quote reads "2-ton AC" and nothing more, you do not know what you are buying.
• Condemning the furnace without showing you. A cracked heat exchanger is serious, but a technician who finds one should show you the crack, a camera image or a combustion reading, not just a verdict.

What HVAC work typically costs in Mississauga

Here is what we can say in print. Everything else needs a visit and a written quote, because the house decides the number.

• Furnace repair. Diagnosed and quoted in writing first. Common parts such as ignitors, flame sensors and capacitors usually land at a few hundred dollars; blower motors, inducers and control boards cost more.
• AC repair. Same approach. Capacitors and contactors are modest fixes. A compressor or coil on an older R-22 unit can approach the cost of a new system, which is when you should see both prices.
• High-efficiency gas furnace, installed. From $3,300 for a two-stage, variable-speed model at 96% to 97% AFUE, rising with BTU size, venting work and any duct changes.
• Cold-climate heat pump, installed. From $5,500, rising with tonnage, whether it pairs with your furnace or an electric air handler, and the electrical work. Rebates come off after.
• Ductless mini split. Written quote, priced by the number of indoor heads and the line set runs. A single zone for a sunroom is the simplest job of the lot.
• Tankless water heater, installed. From $3,300 for a Rinnai condensing unit with venting and gas line.

Any quote should spell out what the price depends on and state a guaranteed total. If it does neither, it is not finished. You can see our starting prices by service on our Mississauga HVAC page.

How Mississauga's homes change the answer

Mississauga is three housing stocks, and a good contractor talks about them differently.

1960s and 1970s bungalows and backsplits in Clarkson, Cooksville and Port Credit. Ducts are often small, return air is short, and the electrical panel may be 100 amps with every breaker spoken for. The questions to ask are about static pressure, return air and a load calculation on the panel before anyone promises a heat pump will slot right in.

1990s subdivisions in Meadowvale, Erin Mills and Streetsville. The original furnace and air conditioner are now well past a normal service life, and the AC is likely an R-22 unit. The right conversation is replacement, and the right comparison is a furnace and AC pair against a cold-climate heat pump with the furnace as backup. Ask each company to price both.

Townhomes across Churchill Meadows, Lisgar and Malton. Tight furnace closets, shared walls that carry noise, and small side yards for the outdoor unit. Ask about the sound rating of the outdoor unit, clearance to the neighbour's wall, and whether the crew has done that exact closet layout before.

Then there is the lake. Summer humidity off Lake Ontario means an oversized AC that cools fast and shuts off leaves the house clammy, so sizing matters more here than inland. Damp winter cold is hard on burners and flame sensors, which is why an annual furnace tune up in Mississauga is worth the money. And the sunrooms and finished basements that make these houses pleasant are usually off the duct system, which is where a ductless head earns its keep.

Repair or replace: the question behind most Mississauga quotes

A lot of quotes start as a repair call. The furnace will not light, or the AC quit on a Friday in July, and the technician says it may be time. Here is a fair way to judge that advice.

If the equipment is under 12 years old and the fault is one part, repair it. If it is original to a 1990s house, or older, and the repair is a major component such as a blower motor, compressor, control board or coil, ask for the replacement price on the same sheet and compare the two against what you pay Enbridge and Alectra every year. A cracked heat exchanger is the one case where replacement is not a judgment call. For an R-22 air conditioner, a leak repair with a recharge is nearly always money better spent on a unit that runs on current refrigerant.

A company that gives you both numbers unasked is showing you how it does business. Our Mississauga AC repair page lays out our rule for air conditioners.

Rebates and financing for Mississauga homeowners

The main program in 2026 is the Home Renovation Savings Program, run by Save on Energy with Enbridge Gas and supported by the Ontario government. For a cold-climate air-source heat pump it pays up to $7,500, scaled by the size of the heat pump, for homes currently heated by electricity, oil, propane or wood. Homes heated by Enbridge natural gas, which is how most Mississauga houses are heated, get a smaller amount, commonly up to $2,000. Ground-source systems can receive up to $12,000, and a smart thermostat gets $100.

Three rules decide whether you get the money. The heat pump must be on NRCan's qualified products list. Pre-approval must be in place before installation. And you should confirm eligibility before the install, because program terms can change. A heat pump on its own does not need a home energy assessment.

Your hydro comes from Alectra Utilities and your gas from Enbridge Gas, so a company modelling a hybrid system should use those rates to set the balance point where the furnace takes over. Ask to see that calculation.

On financing, what we offer is 0% interest for 3, 6 or 9 months, or an open loan from 2.99% on approved credit, with rates subject to lender approval. Any company's financing should be a loan with a rate and a term you can read, not a rental agreement wearing a financing label. Full details are on our heat pump rebates page and our Mississauga heat pump installation page.

How the kinds of HVAC companies in Mississauga compare

No type of company is wrong for every homeowner. The table shows what to compare and where each kind tends to land.

Why we'd put EHI on your shortlist

We are one of the companies you would be comparing, so here is our case in the same terms.

• Over 20 years installing and repairing HVAC in Ontario homes, including the bungalows, backsplits and 1990s two-storeys that make up most of Mississauga.
• Voted Best Company on HomeStars in 2019, 2020 and 2021, and HomeStars Verified.
• Authorized dealer for Midea, Lennox, Kepler and Rinnai, so your warranty is registered through a dealer the manufacturer recognizes.
• Guaranteed final pricing on the agreed scope. If the crew finds something outside it, you get a written change order before any extra work.
• Rebate pre-approval filed before install day and the final paperwork after, at no charge.
• TSSA-certified gas technicians, licensed refrigeration technicians and ESA-licensed electrical work on every job that needs them.
• One office, in Whitchurch-Stouffville. We are a service-area business and our crews drive to Mississauga; we would rather say so than pretend to a storefront on Dundas Street.

We will not tell you we are the only option. Run us through the checklist below like everyone else.

Your printable quote checklist

Print this or keep it on your phone. The company that checks every box is the one to call back.

• TSSA fuels contractor registration shown and checked on the TSSA lookup
• Technician certificates: TSSA gas, licensed refrigeration mechanic, ECRA/ESA electrical
• WSIB clearance certificate and liability insurance certificate provided
• In-home visit done, with measurements taken for a heat-loss and heat-gain calculation
• Written quote with model numbers and efficiency ratings for every piece of equipment
• Guaranteed total price and a clear statement of what is and is not in scope
• Permits named: ESA notification for electrical, any municipal permit, and who pulls them
• Warranty years for parts and labour stated, and who registers it
• Rebate eligibility checked, NRCan qualified model confirmed, pre-approval filed before install
• Financing rate and term in writing, and no rental agreement unless you asked for one
• Old equipment removal and refrigerant recovery included in the price
• After-hours service hours and how to reach a real person