Heating and Cooling Service in Thornhill
Thornhill is our home base. Our office is on the Vaughan side, and we work on both sides of Yonge Street, from the older streets of Thornhill Village, Royal Orchard and Bayview Glen to the newer homes in Thornhill Woods.
- TSSA licensed & insured
- 20+ years in the GTA
- 24/7 emergency service
- 1-year labour warranty
- Registered Home Renovation Savings contractor
Need heating or cooling help in Thornhill?
What do you need in Thornhill?
Tap a service to see how we can help.
Furnace repair and replacement in Thornhill
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 Thornhill
Installation, repair and seasonal tune-ups so every room stays cool.
Heat pumps, including ductless in Thornhill
One system for heating and cooling, sized for your home. Ask us about rebates.
Tank and tankless water heaters in Thornhill
Repair and replacement, including converting a rental to an owned unit.
Boilers and combi boilers in Thornhill
Installation, servicing and repair for hydronic heating.
Gas piping in Thornhill
Gas lines for BBQs, ranges, dryers and fireplaces, installed to code.
Older Thornhill homes
A lot of houses in the older parts of Thornhill were built from the 1950s to the 1980s. They’ve usually been through several furnaces, and they share a few common issues:
- Orphaned water heaters. When a mid-efficiency furnace is replaced with a high-efficiency one, the furnace stops using the chimney. A gas water heater left alone in a big masonry chimney may not draft properly. A chimney liner or a power-vented water heater fixes this, and it’s something we check on every furnace replacement in these homes.
- Small return ducts. Original ductwork was sized for smaller furnaces and no AC. Adding returns makes a new system quieter and more even.
- Renovated homes. Additions and finished basements that the duct system never accounted for.
Newer homes in Thornhill Woods
Homes from the 2000s are now reaching the age where original furnaces, ACs and humidifiers need replacing. If yours are the builder originals, it’s worth planning the replacement before one fails in peak season.

What we do in Thornhill
- 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 Thornhill
- Thornhill Village
- Royal Orchard
- Bayview Glen
- Uplands
- German Mills
- Thornlea
- Thornhill Woods
- Brownridge
- Spring Farm
- Clark and Bathurst area
What our customers say
Questions we get in Thornhill
Where is your office?
On Bentwood Crescent in Thornhill (Vaughan). Thornhill calls are usually the shortest drive for us.
What is an orphaned water heater?
A gas water heater left venting alone into a large chimney after the furnace was changed to high-efficiency. It can draft poorly. A liner or a power-vent water heater solves it.
Do you work on both the Vaughan and Markham sides?
Yes, all of Thornhill.
Ready to book in Thornhill?
📍 Nearby Service Areas
Aurora Star Tech also serves these communities near Thornhill: