AC Installation in Markham
Installing central or ductless AC in Markham? We size and install energy-efficient cooling with a free estimate and a 10-year labour warranty. Markham blends established homes in Unionville and Thornhill with newer builds in Cornell and Greensborough, so we service everything from aging systems to high-efficiency equipment.
Markham AC Installation
Free in-home estimate
A right-sized cooling recommendation based on a proper load calculation for your home.
Central air conditioning
Energy-efficient single and two-stage central AC from Lennox and other major brands.
Ductless mini-splits
Zoned cooling for additions, condos, and homes without ductwork.
TSSA-certified install
Licensed electrical and refrigerant work with full permit handling.
10-year labour warranty
Every AC installation is backed by our 10-year labour warranty.
Rebate assistance
Guidance on eligible Ontario rebates for high-efficiency and heat-pump cooling.
Cooling a Large Markham Home Properly
Past a certain floor area, one condenser and one thermostat stop being the right answer. In the larger Markham homes, particularly around Angus Glen and Cathedraltown, a single system sized to cover the whole house will be oversized for most of the season and still leave the far wing uncomfortable, because the problem is distribution rather than capacity.
The two workable designs are a zoned single system with proper dampers and a variable-speed air handler, or two smaller independent systems. Zoning costs less and shares one outdoor unit. Two systems cost more, give genuine independence between floors and mean a failure does not take out the whole house. We run the heat gain calculation and price both so the choice is yours on real numbers.
Typical Pricing in Markham
| Service | Price Range |
|---|---|
| Central AC installed | From $3,500 |
| Ductless mini-split installed | $3,800 to $7,500 per zone |
| In-home estimate | Free |
All prices include labour. Flat-rate quotes provided before work begins. No hidden fees.
Serving All Markham Neighbourhoods
EcoFrost provides same-day HVAC service across Markham. From older homes to new builds, our TSSA-certified technicians know local equipment and climate demands.
Frequently Asked Questions about AC Installation in Markham
How much does AC installation cost in Markham?
Central AC installation in Markham starts around $3,500 and varies with size and efficiency. Ductless mini-splits run $3,800 to $7,500 per zone. We quote after a free assessment.
Can you install AC in older Markham homes without ducts?
Yes. For Markham homes without ductwork, a ductless mini-split delivers efficient, zoned cooling without major renovation.
How long does an AC install take?
Most central AC replacements are completed in a single day. New ductless installs are typically same-day as well.
Do you help with cooling rebates?
Yes. We help eligible homeowners claim current Ontario rebates, which are strongest on heat-pump systems that both heat and cool.
Do I need two air conditioners for a large Markham home?
Not necessarily, but you probably need more than one zone. A single-zone system serving a big floor area satisfies the thermostat wherever that thermostat happens to be and leaves the rest of the house to fend for itself. Zoning a single system fixes that for less than a second system costs. We price both against a proper heat gain calculation rather than guessing from square footage.
Is bigger equipment the simpler fix?
No, and it usually backfires. An oversized air conditioner cools the space near the thermostat quickly, shuts off, and never runs long enough to move air through the whole house or to pull humidity out of it. You end up with a house that is cold in one place, clammy in another, and equipment that short cycles its way to an early failure.
Does a zoned system need a special thermostat?
It needs one thermostat per zone plus a zone control panel, and ideally a variable-speed air handler that can modulate rather than running flat out into partly closed dampers. That combination is what makes zoning comfortable rather than noisy. We specify the whole assembly together, because a zone panel bolted onto a single-stage system tends to disappoint.
Do you service all Markham neighbourhoods?
Yes. We cover Unionville, Cornell, Berczy Village, Markham Village, Milliken Mills, Thornhill, Cathedraltown, and every Markham community with same-day and emergency service.
Ready to Book? We Serve Markham 24/7
TSSA-certified. $0 overtime fees. Same-day service available across Markham and surrounding areas.
More HVAC help in Markham
Related EcoFrost pages for Markham homeowners.