Heating, Cooling and Heat Pump Service in Markham
From heritage homes in Unionville and Old Markham Village to newer streets in Cornell, Berczy Village and Cathedraltown, Markham has a wide range of HVAC setups. We work on furnaces, ACs, heat pumps, ductless systems, combi boilers and water heaters.
- TSSA licensed & insured
- 20+ years in the GTA
- 24/7 emergency service
- 1-year labour warranty
- Registered Home Renovation Savings contractor
No heat, no cooling, or planning a replacement?
What do you need in Markham?
Tap a service to see how we can help.
Furnace repair and replacement in Markham
Heat not working or a furnace that is 15+ years old? We diagnose, repair and install high-efficiency furnaces.
Central air and AC repair in Markham
Installation, repair and seasonal tune-ups so every room stays cool.
Heat pumps, including ductless in Markham
One system for heating and cooling, sized for your home. Ask us about rebates.
Tank and tankless water heaters in Markham
Repair and replacement, including converting a rental to an owned unit.
Boilers and combi boilers in Markham
Installation, servicing and repair for hydronic heating.
Gas piping in Markham
Gas lines for BBQs, ranges, dryers and fireplaces, installed to code.
Common Markham setups
- Townhouses with combi or air handler systems. Many newer townhomes heat with hot water from a combi boiler or water heater feeding an air handler. When heat and hot water both get weak, the heating appliance is usually the place to start.
- Larger detached homes with high hot water demand and several bathrooms. Tankless water heaters and recirculation pumps are common, and they need regular descaling.
- Heritage and older homes in Unionville and Old Markham with limited space for ductwork. Ductless heat pumps are often the cleanest way to add cooling or improve comfort in specific rooms.
Ductless heat pumps
Ductless mini-splits work well for additions, basements, home offices and older houses without ducts. Cold-climate models heat well into the winter, and many homeowners use them alongside their existing furnace or boiler. Our post on ductless mini-splits in Markham explains where they make sense.

What we do in Markham
- Furnace repair and replacement
- Central air conditioning and heat pumps, including ductless
- Tank and tankless water heaters (Rinnai Pro certified)
- Boilers and combi boilers
- Gas lines for BBQs, ranges, dryers and fireplaces
- Humidifiers, filtration and HRVs
Rebates
We’re a registered contractor with Home Renovation Savings, so qualifying heat pump and high-efficiency upgrades can come with rebates. Programs and amounts change during the year, so we check what applies to your home when we quote. Estimates for new installations are free, and financing is available.
Areas we cover in Markham
- Unionville
- Old Markham Village
- Cornell
- Berczy Village
- Cathedraltown
- Angus Glen
- Wismer
- Greensborough
- Box Grove
- Milliken Mills
- Markham side of Thornhill
- Buttonville
What our customers say
Questions we get in Markham
Can a ductless heat pump heat my home in winter?
Cold-climate models keep heating well below freezing, but output drops in deep cold. Many homes use them with a furnace or boiler as backup.
My townhouse heat and hot water are both weak. What is wrong?
In a combi or air handler setup, both come from the same appliance. Scale, a failing pump or a control issue on that appliance is the usual cause.
Do you service Rinnai and Navien units?
Yes. We are Rinnai Pro certified and service most tankless and combi brands.
Ready to book in Markham?
📍 Nearby Service Areas
Aurora Star Tech also serves these communities near Markham: