Choosing a Heating Contractor in Markham
What a licensed heating contractor does, how to verify TSSA registration, and 7 tips for a safe, efficient winter.
The short answer: A heating contractor in Markham installs, services and repairs furnaces, boilers, heat pumps and other home heating systems. In Ontario, anyone working on a gas appliance must be employed by a TSSA-registered contractor and hold a valid gas technician certificate, so check registration first. Book a tune-up in early fall, keep working CO alarms, and use the same trusted contractor year after year for faster, safer service all winter.
When the temperature drops below freezing, your furnace becomes the most important appliance in your home. Choosing the right heating contractor in Markham is what keeps that system safe, efficient and running through January cold snaps. This guide explains what a heating contractor actually does, which systems they should be qualified to handle, how to confirm they are licensed in Ontario, and seven practical tips to get the most from every visit this winter.
If your heat needs attention today, you can book a heating visit online or call 310-HEAT any time, day or night.
Key takeaways
- A heating contractor handles installation, maintenance and repair of furnaces, boilers, heat pumps and hybrid systems.
- In Ontario, gas work must be done by a TSSA-registered contractor with a certified gas technician.
- Fall (September to October) is the best time for a furnace tune-up, before demand peaks.
- Working carbon monoxide alarms near every sleeping area are required by the Ontario Fire Code in homes with fuel-burning appliances.
- A maintenance plan gives you priority booking when a winter emergency hits.
What Does a Heating Contractor in Markham Do?
A heating contractor is a licensed specialist who designs, installs, maintains and repairs the equipment that heats your home. Most Markham homes run on natural gas furnaces, so a large share of the work involves gas appliances, venting and controls. A full-service heating contractor in Markham typically covers:
- Installation and replacement of furnaces, boilers, heat pumps and hybrid (dual-fuel) systems, including sizing the equipment to your home.
- Seasonal maintenance, such as cleaning burners, testing safety controls, checking the heat exchanger and measuring combustion.
- Diagnosis and repair when the system short-cycles, blows cold air or will not start.
- Emergency service on nights, weekends and holidays when the heat fails in freezing weather.
- Indoor comfort upgrades like smart thermostats, humidifiers and air cleaners that work alongside your heating system.
You can see the full range of work we handle on our heating and cooling services page. If your system needs work right now, our guide to emergency furnace repair in Markham explains what to do while you wait.
Heating Systems a Contractor Should Handle
Markham has a mix of older homes with boilers and newer subdivisions with high-efficiency furnaces and heat pumps. A qualified heating contractor in Markham should be comfortable with each of these:
| System | How it heats | What the contractor does |
|---|---|---|
| High-efficiency gas furnace | Burns natural gas, blows warm air through ducts (up to 98.5% AFUE) | Sizing, installation, venting, combustion testing |
| Boiler | Heats water for radiators or in-floor heat | Pressure checks, venting, pump and valve service |
| Cold-climate heat pump | Moves heat from outdoor air into the home | Load calculation, refrigerant work, defrost checks |
| Hybrid (dual-fuel) | Heat pump plus gas furnace backup for deep cold | Balance-point setup, controls, both systems serviced |
| Ductless mini-split | Wall or ceiling units heat individual rooms | Zoning design, line sets, filter and coil cleaning |
Weighing an upgrade? Our breakdown of a high-efficiency furnace in Markham and our guide to heat pump installation in Markham compare the two most popular options.
How to Verify a Heating Contractor in Markham Is Licensed
Gas work is regulated in Ontario for a reason: a poorly installed or neglected appliance can leak carbon monoxide or gas. The Technical Standards and Safety Authority (TSSA) is the provincial regulator, and checking a contractor takes only a few minutes:
- Confirm TSSA registration. Any business doing fuel work must be a registered contractor. You can confirm registration through TSSA's authorized fuels contractor listing.
- Ask about technician certificates. The person working on your gas furnace should hold a valid gas technician certificate (G2 or G1). Oil systems require an oil burner technician certificate.
- Check permits for installations. A new furnace or gas line normally needs a permit and inspection. A reputable heating contractor in Markham handles this for you.
- Look for manufacturer authorization. Dealer status, such as Carrier Factory Authorized, shows the company meets training and service standards set by the equipment maker.
- Confirm insurance and a written warranty covering both parts and labour before any work begins.
Aire One is a TSSA-registered contractor and has served Markham since 1990 with NATE-certified and Red Seal technicians.
7 Tips for a Safe, Efficient Winter With Your Heating Contractor
A good relationship with your heating contractor in Markham is about more than one repair. These habits help you avoid breakdowns and get better value from every visit:
- Book your tune-up before the first frost. September and October appointments are easier to schedule, and problems get fixed before you rely on the heat. Here is why annual HVAC maintenance pays for itself.
- Ask for a combustion and CO check. A proper tune-up measures how cleanly the furnace burns and checks for carbon monoxide, not just a filter change.
- Test your carbon monoxide alarms. Ontario requires CO alarms next to each sleeping area and on every storey in homes with a fuel-burning appliance. Test them monthly and replace them at the end of their rated life.
- Change the filter every one to three months. A clogged filter is one of the most common causes of overheating and shutdowns in January.
- Keep vents, intakes and the outdoor exhaust clear. After a snowfall, check that the furnace intake and exhaust pipes on the side of the house are not blocked.
- Keep your service records. Most manufacturer warranties require proof of annual professional maintenance. Ask your contractor for a written report after every visit.
- Plan a replacement before it fails. If your furnace is 15 or more years old and needs frequent repairs, get a quote in the off-season instead of during a mid-winter breakdown.
A Heating-Season Calendar for Markham Homes
Markham's heating season usually runs from October to April. Timing visits from your heating contractor in Markham around it keeps costs down and comfort up:
| When | What to schedule |
|---|---|
| September to October | Furnace or boiler tune-up, CO alarm check, filter change |
| November to March | Monthly filter checks, clear exhaust vents after snow, call fast for any no-heat issue |
| April to May | Air conditioner or heat pump tune-up, plan any replacement quotes |
| June to August | Off-season installations, often with shorter wait times |
What a Visit Costs and What Is Included
A diagnostic visit from Aire One, your heating contractor in Markham, starts with a $79 service call. The technician finds the cause, explains your options and gives you the repair price up front, before any work begins. Installations come with a free Total Home Assessment, financing options and a 10-year worry-free warranty.
To keep costs predictable all winter, many homeowners choose a maintenance and protection plan. It bundles the yearly tune-up, keeps your warranty valid and gives you priority booking during cold snaps. For repairs on any make or model, see our HVAC servicing and repairs.
Why Homeowners Call Aire One as Their Heating Contractor in Markham
Aire One has kept Markham homes warm since 1990, with more than 120,000 installations, 150 service trucks and a team on call 24 hours a day. As a Carrier Factory Authorized Dealer with a 4.8-star Google rating from 541 reviews, we focus on honest advice, licensed workmanship and fast response when the heat is out.
Get your heating system ready for winter
TSSA-registered and trusted in Markham since 1990. Book a tune-up, repair or free assessment today.
310-HEAT (310-4328) · 24/7 service · $79 service call*
Frequently Asked Questions
How do I know if a heating contractor in Markham is licensed?
Check that the company is a TSSA-registered fuels contractor and ask whether the technician holds a valid gas technician certificate such as G2. A licensed contractor will also pull permits for new installations and give you a written warranty before work starts.
When should I book a furnace tune-up in Markham?
The best time is September or October, before the first hard frost. Appointments are easier to get, and any worn parts can be replaced before you depend on the heat. If you missed the fall window, book as soon as possible rather than waiting for a problem.
What is the difference between a heating contractor and an HVAC company?
An HVAC company covers heating, ventilation and air conditioning. A heating contractor focuses on the heating side: furnaces, boilers, heat pumps and gas lines. Many companies, including Aire One, do both, so one contractor can service your furnace in fall and your air conditioner in spring.
Do I need carbon monoxide alarms if I have a gas furnace?
Yes. The Ontario Fire Code requires working carbon monoxide alarms next to each sleeping area and on every storey of a home with a fuel-burning appliance, a fireplace or an attached garage. Test them monthly and replace them as the manufacturer recommends.
Does Aire One offer 24/7 heating service in Markham?
Yes. Aire One answers heating calls 24 hours a day, seven days a week across Markham and York Region. A service visit starts at $79, and the technician confirms the repair price before any work begins.
Sources and Helpful Resources
- TSSA: Authorized Heating Fuel Contractors
- TSSA: Carbon Monoxide and Your Furnace
- ENERGY STAR Canada (Natural Resources Canada)
- ENERGY STAR: Guide to Energy-Efficient Heating and Cooling
Matthew leads the Aire One Markham and Metro Toronto team, helping homeowners keep their heating systems safe, efficient and reliable through every Ontario winter. Aire One has been a TSSA-registered, Carrier Factory Authorized Dealer since 1990.