Kepler
ENERGY STARKepler Prestige Comfort 97
Prestige Comfort · Two-stage · Variable-speed · 97% AFUE · ENERGY STAR®
97%AFUE
Efficiency
97% AFUE
Heating
Two-stage
Blower
Variable-speed ECM
Heat exchanger
Lifetime warranty
Serving Markham & Surrounding Areas
HVAC Services in Markham
Expert heating, cooling & air quality services for Markham homeowners. Family-owned since 1999. 24/7 emergency service.
5.0 Google & HomeStars
Licensed & Insured
24/7 Emergency Service
TSSA Certified Technicians
Customer Reviews·
5.0 / 5.0 · 104+ Google reviews
Markham HVAC Experts
Trusted HVAC Service in Markham, Since 1999
Markham homeowners choose Megacity HVAC for dependable heating and cooling service. From Unionville to Cornell, Markham Village to Milliken — our certified technicians deliver expert HVAC installations, repairs, and maintenance. We're an authorized Lennox dealer and Enbridge Sustain Trusted Partner, ensuring you get quality equipment at the best value. Markham is one of the GTA's fastest-growing municipalities, with large new subdivisions in Cornell and Cathedraltown alongside established 1980s–90s neighbourhoods in Milliken and Buttonville. Our team is experienced with both the builder-grade HVAC systems common in newer Markham homes and the aging equipment in older developments that needs upgrading.
Markham's housing stock is predominantly newer suburban construction — 1980s and 1990s two-storey detached homes in areas like Milliken and Buttonville, and 2000s-era large detached homes in Cornell and Cathedraltown. Many of these homes came with builder-grade mid-efficiency furnaces and standard 13-SEER AC units that are now reaching end of life. Newer Markham developments often feature open-concept layouts with vaulted ceilings that create airflow challenges, requiring properly sized equipment and sometimes zoning systems to maintain even temperatures across two or three floors.
Markham reads differently on either side of Highway 7. South of it, Milliken and the older streets around Markham Village and Thornhill are 1970s and 1980s two-storeys and side-splits where the air conditioning was usually added years after the house was built. North and east, Cornell, Berczy Village, Cathedraltown and Angus Glen went up from the late 1990s onward, so those homes are hitting the age where the builder-installed furnace and AC both come due at once. Homes off Major Mackenzie and 16th Avenue often run three finished levels on one thermostat.
Markham sits on higher ground north of Toronto and tends to see colder winter nights and earlier frost than lakefront communities. The large lot sizes and exposed suburban layouts in areas like Cornell and Angus Glen mean homes face more wind exposure, making proper attic insulation and a reliable high-efficiency furnace essential for keeping heating costs manageable.
What Markham homeowners get from us
- Serving Unionville, Cornell, Markham Village, Milliken, and all Markham neighbourhoods
- Experienced with newer subdivisions and custom home HVAC systems
- Authorized Lennox dealer — premium equipment at competitive prices
- Enbridge Sustain lease-to-own available — $0 down, maintenance included
- Specialists in replacing builder-grade HVAC systems in 1990s–2000s Markham homes
- Multi-zone heating and cooling solutions for large Markham homes with open-concept layouts
Services we offer in Markham
Furnace installation & repair
Air conditioning installation & repair
Heat pump installation (cold-climate)
Water heater replacement
Ductless mini-split systems
Indoor air quality & HRV
Annual HVAC maintenance plans
Emergency service 24/7
24/7 Emergency
Real answer, day or night — no extra fees for evenings or weekends.
Upfront Pricing
A fixed price before any work starts. You approve it first.
TSSA Certified
Licensed, insured, background-checked techs and full warranty support.
5.0★ · 100+ Reviews
Top-rated on Google and HomeStars, serving the GTA since 1999.
Equipment We Install
The HVAC Equipment We Install in Markham
One furnace, air conditioner, heat pump, and water heater from the lineup we install across the GTA — full manufacturer specs on each.
Kepler
Kepler Vortex 16
Vortex 16 · Single-stage
13.4SEER2
Efficiency
13.4 SEER2
Cooling
Single-stage
Refrigerant
R-410A
Warranty
10-yr parts + compressor
Kepler
Kepler LUXE (Ultra Heat)
LUXE · Inverter · Cold-climate
up to 18SEER2
Cooling
Up to 18 SEER2
Heating
9.5 HSPF2
Cold-climate
Rated to -30°C
Compressor
Inverter
GE
ENERGY STARGE Profile GeoSpring Hybrid
GeoSpring · Hybrid heat-pump · ENERGY STAR®
50Gallons
Type
Hybrid heat-pump
Efficiency
Up to 4.3 UEF
First-hour
77 gal
Warranty
10-yr tank & parts
All specifications are published by the manufacturer. We install and service these systems across Toronto & the GTA.
Our Process
What to Expect From a Megacity HVAC Visit
1
Call or Book Online
Describe the issue. We dispatch a technician with common parts already on board.
2
Full Diagnostic
We test refrigerant pressure, electrical connections, heat exchangers, and airflow — finding the root cause, not just the symptom.
3
Upfront Quote
A clear explanation and a fixed price. You approve before any work starts.
4
Repair or Install & Verify
We fix or install, run a complete system cycle, confirm temperatures, and clean up before leaving.
Diagnostics
Common HVAC Issues in Markham
Most are resolved same-day with parts we carry on our trucks.
Retrofit AC on a 1970s Duct System
Around Markham Village and Milliken the central air was added long after the house. The ducts were sized for heating only, so the top floor never quite catches up on a hot afternoon.
Builder-Grade Systems Aging Out Together
Cornell and Berczy houses were finished with a basic furnace and AC at the same time. Twenty years on, both tend to fail within a season or two of each other.
Three Floors, One Thermostat
Larger homes off Major Mackenzie and 16th Avenue were built with a single zone. The basement stays cold, the top floor stays warm, and the thermostat in the hallway reports that everything is fine.
Zone Dampers That Have Stopped Moving
Angus Glen and Cathedraltown houses with two-zone systems often have a damper motor that quit years ago. One zone runs permanently open and the other never gets what it is asking for.
Ductless Heads in Townhome Additions
Finished basements and above-garage rooms in the newer subdivisions frequently get a ductless head. Line-set flare leaks and blocked condensate pumps are the two calls we see most.
Filters Sized for a Slot Nobody Checks
A one-inch filter in a high-static return starves a variable-speed blower. It is the cheapest thing on the system and the most common reason a good furnace short-cycles.
Brands We Install
Trusted Equipment Brands We Install & Service
Authorized Lennox Dealer — with experienced installation, repair, and maintenance across our supported HVAC and water-heater brands.
FUJITSU
JOHN WOOD
$0
Down
Trusted Partner
Lease-to-Own Through Enbridge Sustain
As a certified Enbridge Sustain Trusted Partner, we offer Markham homeowners a new furnace, AC, heat pump, or water heater with nothing down. The Sustain lease-to-own program keeps the upfront cost at $0. In-house rebates available — ask at your quote. We don't file government rebate paperwork for customers.
- No upfront cost — $0 down on approved credit
- Maintenance and repairs included for the term
- Predictable, manageable monthly payments
Common Questions
HVAC FAQ — Markham
If your air conditioner is running badly or not at all, start with AC Repair Markham. If it is past saving or you are cooling a house that has never had central air, use AC Installation Markham. If you are not sure which, call and describe the symptoms. Talking it through takes two minutes and saves you a diagnostic on a unit that is already finished.
We work out of East York, so Markham is up the 404 or Kennedy depending on where you are. It is inside our normal service area. We give you an arrival window when you book rather than a fixed minute promise, because the 404 at 4pm is not the 404 at 10am.
Usually the air conditioner, because the builder-grade condensers of that era were sized to the minimum. The furnace often has a few years left, but the two were installed the same week, so it is worth pricing them together. Replacing both at once costs less than two separate visits and lets us match the blower to the coil properly.
Yes. We service the major ductless brands, and most of what we find is refrigerant weeping at a flare fitting, a failed condensate pump, or a blower wheel packed with dust. We check the line set and the drain path before touching refrigerant, since a slow leak that gets topped up instead of fixed comes back the following summer.
Get In Touch
Get a Free HVAC Estimate in Markham
Tell us what your system is doing and we will get back to you fast. Same-day service available across Markham and the GTA — or call and talk to a real person now.
Call 24/7(416) 286-5665
Rated5.0★ on Google & HomeStars
Also Serving Nearby Communities
Markham HVAC Service Pages
This page covers heating, cooling, hot water and air quality in Markham together. For one job in particular, the page for it goes into more detail.
Last updated September 10, 2026