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Consumer checklist

7 min read · Updated October 2026 · Written by Kelvin Mechanical

Choosing an HVAC Contractor in Ontario: A Practical Checklist

A neutral checklist you can use with any heating, cooling or water heating contractor: scope, sizing, permits, warranties, references, rebates and exclusions.

Illustration: checklistIllustration

Begin with a written scope you can read

A good quote reads like a plan. It lists the equipment by make and model, the capacity, and each piece of work around it, including venting, gas or electrical connections, ductwork changes, thermostat, condensate handling, removal of old equipment, cleanup, start-up and testing. If a line says only "new furnace installed", ask for the detail.

The goal is comparison. Two totals mean little until you know whether both quotes include the same work. When one quote is thinner, find out what is missing before you decide it is cheaper.

Ask to see how the equipment was sized

Heating and cooling equipment should be sized from a proper load calculation or a site review, not from square footage or the size of the old unit. Ask the contractor how they did it, what inputs they used and whether you can see the result. For ducted systems, ask whether ductwork was assessed, including return air and static pressure.

Oversized equipment tends to short cycle and run less comfortably. A contractor who can explain their sizing in plain terms is usually one who has done the work.

Permits, licensing and who does which job

Different parts of a job can involve different qualifications. Gas work, electrical work, refrigerant handling and plumbing connections each have their own rules in Ontario. Ask who will do each part, whether that person holds the appropriate licence or authorization, and who arranges permits and inspections where required.

It is reasonable to ask any contractor, Kelvin Mechanical included, about liability insurance and workplace coverage, and to expect clear answers in writing.

  • Who is responsible for permits and any inspections?
  • Who handles gas connections, electrical work and refrigerant work?
  • What happens if an inspector asks for a change?
  • Who do you call after the job if something is not right?

Warranty terms worth getting in writing

Manufacturer warranty, installer labour warranty and extended warranty are different things. Ask for each separately: how long it runs, what it covers, who you call to make a claim, whether registration is required and what could affect coverage. Labour is often not covered by the manufacturer warranty at all.

Be wary of a verbal promise that does not appear in the paperwork. If something matters to your decision, it belongs on the quote or agreement.

References, reviews and a sensible read on track record

Look for patterns in reviews rather than single highs or lows. Ask for references from jobs similar to yours, such as a furnace replacement in a similar home or a ductless install in a similar layout. Notice how the contractor answers questions, whether they explain trade-offs, and whether they pressure you to sign right away.

Experience counts, but so does how a company treats you before the contract. Kelvin Mechanical was founded in 2019, and we encourage you to compare us against anyone else on the same checklist. You can read about us on the about page.

Rebates, financing and rental paperwork

If a rebate matters to your decision, ask who applies for it, what paperwork you will need to provide, how the rebate is handled on the invoice and what happens if it is declined or funding runs out. Rebate information in Ontario can change, and you should confirm current rules with the program.

If you are financing or renting equipment, get the terms in writing: approval conditions, interest or fees, buyout or removal rules and what happens if you move. Financing, rental and extended warranties are different things, and financing and extended warranty options explains how. Any offer should be conditional on provider approval, terms and expiry.

Exclusions, changes and the final conversation

  • What is excluded: drywall repair, panel upgrades, chimney work, gas line changes or duct modifications
  • How changes are priced if something unexpected turns up during the job
  • Payment schedule and what triggers each payment
  • How cleanup, access and protection of floors are handled
  • Who your point of contact is, and how to reach them after the job

When you are ready to compare, Build My Quote lets you send us your details for a site review, and a quote follows that review. Use this same checklist on our quote, and on anyone else's.

Help centre

Common questions

Should I always choose the lowest quote?

Not automatically. First confirm that each quote covers the same equipment, work, venting, permits and warranty terms. A lower total can mean a smaller scope, and a higher one can include work the other leaves out.

Do I need a site review before getting a quote?

For anything involving sizing, venting, gas or electrical capacity, yes. A phone or online estimate can start the conversation, but a quote that skips the site review is based on assumptions.

Who handles permits for HVAC work in Ontario?

It depends on the project and the municipality. Ask the contractor which permits are needed, who applies for them and how inspections are scheduled, and get the answer in writing.

What questions should I ask about warranties?

Ask how long the manufacturer warranty and the labour warranty run, what each covers, whether registration is required and who to call for a claim. Keep extended warranty terms separate.

Is it reasonable to ask for references?

Yes. A contractor who is confident in their work should be comfortable pointing you to similar completed jobs, photos or customers who agree to speak with you.

How do I check what licence or authorization a contractor needs in Ontario?

It depends on the work. Gas work, electrical work, refrigerant handling and plumbing connections each have their own rules. Ask who will do each part, what licence or authorization it requires and where you can confirm it. Where a regulator keeps a public record, check it yourself. Get the answer in writing before you sign.

Should I pay a deposit before an HVAC project starts?

Payment terms vary, so ask for the schedule in writing: what is due when, and what triggers each payment. Be cautious of large payments before a written scope exists. Match the payment steps to progress on the work. If financing or rental is involved, the provider's terms apply on top of the contractor's.

What are red flags when getting an HVAC quote?

Watch for pressure to sign right away, a quote with no site review, sizing by floor area alone, a vague scope, verbal promises that are not written down and a refusal to say who does the gas or electrical work. A good quote reads like a plan. Compare two or three on the same written scope.

Can someone sell me a furnace or water heater at my door in Ontario?

Ontario restricts door-to-door selling of several home comfort products, including furnaces and water heaters. Rules change, so check the current consumer information from the Ontario government. If someone calls or arrives unexpectedly, take your time, ask for the company's written details and compare against other quotes before agreeing to anything.

How many quotes should I get for a furnace or heat pump?

Two or three written quotes is a common approach. What matters is that they cover the same scope: equipment model, sizing method, venting, permits, removal, warranty terms and exclusions. A site review for each makes the comparison fairer. Compare scope first and total second, and ask about anything one quote leaves out.

What can I do if I am unhappy with HVAC work in Ontario?

Start with the contractor, in writing, describing the problem and adding photos and dates. Check your contract and warranty documents for the process. If it is not resolved, you can look at consumer resources from the Ontario government or seek independent advice. Keep every document and a note of what was agreed.

What should a landlord or property manager ask an HVAC contractor?

Ask the usual scope, sizing, permit and warranty questions, plus a few more: tenant notice and access, how service requests are handled, how reports and records are shared, and which equipment each unit has. For multi-unit or light commercial buildings, ask about the equipment type before booking. See property management HVAC.

How can I check that a gas contractor is registered in Ontario?

In Ontario, fuel-burning appliances such as furnaces, boilers and gas water heaters may only be installed, serviced or maintained by a registered fuels contractor working with technicians who hold the required certificate. The provincial fuel-safety regulator publishes a public contractor lookup on its website. Ask for the company's registration details and the technician's certificate before work begins, and check them yourself.

Quote and booking

Request a quote after a site review

Share a few details and we will follow up. A written quote comes after a site review. There is no online checkout.

  • City and service type help us route your request
  • Urgency and property details let us prepare properly
  • Optional equipment photos speed up repairs and replacements

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