Kepler
ENERGY STARKepler Essential One 96
Essential One · Single-stage · 96% AFUE · ENERGY STAR®
96%AFUE
Efficiency
96% AFUE
Heating
Single-stage
Blower
Constant-torque
Heat exchanger
Lifetime warranty
Serving Ajax & Surrounding Areas
HVAC Services in Ajax
Expert heating, cooling & air quality services for Ajax 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
Ajax HVAC Experts
Trusted HVAC Service in Ajax, Since 1999
Ajax homeowners trust Megacity HVAC for reliable heating and cooling service. Whether you need a furnace replacement in South Ajax, AC installation near the waterfront, or a heat pump upgrade in Pickering Village — our TSSA-certified technicians deliver professional HVAC solutions backed by 25+ years of GTA experience and a perfect customer rating. Ajax is a well-established Durham Region community with a mix of 1970s–80s homes in South Ajax and the waterfront area, alongside newer townhouse and detached home developments in North Ajax. Our technicians understand the specific HVAC challenges of Ajax homes, from replacing aging furnaces in original South Ajax builds to optimizing airflow in the multi-level townhouse designs common in newer communities.
Ajax's residential core was developed in the 1970s and 1980s, with South Ajax and the waterfront area featuring split-level homes, bungalows, and early two-storey designs with original HVAC systems that have reached or exceeded their expected lifespan. Many of these homes have single-stage 60–80% efficiency furnaces paired with older R-22 refrigerant AC units that can no longer be recharged cost-effectively. North Ajax developments from the 2000s–2010s have newer but often builder-minimum systems, and the stacked townhouse and condo developments along Bayly Street present unique ductwork and access challenges for service and replacement.
Ajax grew out of a wartime townsite, and the oldest streets in South Ajax still reflect that with compact 1940s and 1950s houses on tight lots. Pickering Village keeps an older, more varied stock. Central Ajax and the neighbourhoods along Harwood and Westney filled in through the 1970s and 1980s, and Nottingham, Riverside and the areas north toward Taunton are 1990s and 2000s subdivisions. The lakefront south of Bayly stays humid through the summer, which affects sizing more than most homeowners expect.
Ajax's position along Lake Ontario means waterfront and South Ajax homes experience lake-moderated temperatures year-round, but also higher humidity in summer that requires reliable dehumidification. North Ajax, farther from the lake, sees wider seasonal temperature swings and can experience several degrees colder on winter nights than homes near the waterfront.
What Ajax homeowners get from us
- Serving South Ajax, Pickering Village, Westney Heights, and all Ajax communities
- Fast response times via Highway 401 from our East York headquarters
- Authorized Lennox dealer — energy-efficient equipment at competitive prices
- Enbridge Sustain Trusted Partner — $0 down HVAC lease-to-own program
- Specialists in replacing R-22 AC systems and aging furnaces in 1970s–80s South Ajax homes
- Experienced with townhouse and stacked condo HVAC service along Bayly Street
Services we offer in Ajax
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 Ajax
One furnace, air conditioner, heat pump, and water heater from the lineup we install across the GTA — full manufacturer specs on each.
Lennox
ENERGY STARLennox ML14KC1
Merit® Series · Single-stage · ENERGY STAR®
14.3+SEER2
Efficiency
14.3+ SEER2
Cooling
Single-stage
Sound
As low as 73 dB
Refrigerant
R-454B
Payne
Payne PH5SAN5
PH5SAN5 · Single-stage
up to 16.5SEER2
Cooling
Up to 16.5 SEER2
Heating
Up to 8.1 HSPF2
Cooling stage
Single-stage
Refrigerant
R-454B
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 Ajax
Most are resolved same-day with parts we carry on our trucks.
Small Wartime Houses, Modern Equipment
South Ajax houses were built compact. Modern furnaces are physically larger and need venting and condensate paths that the original mechanical space never anticipated.
Oversized Air Conditioners South of Bayly
Close to the lake the summer air is heavy. An air conditioner sized too large satisfies the thermostat fast and leaves the house cold and damp instead of comfortable.
1980s Ductwork Under a New Furnace
The Harwood and Westney corridor stock has mostly had its furnace replaced at least once, usually without anyone measuring whether the ducts could carry the extra airflow.
Finished Basements Without Return Air
Basement rec rooms and apartments across central Ajax were commonly finished without adding a return, which starves the system and makes the main floor noisy.
Condensate Lines Draining Nowhere Useful
High-efficiency furnaces and coils produce water. In older houses the drain often ends in a laundry tub or a poorly sloped line that backs up and trips the safety switch.
Newer Subdivision Equipment Coming Due
Nottingham and Riverside homes from the 1990s and 2000s are now on the replacement cycle for both heating and cooling equipment.
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 Ajax 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 — Ajax
About thirty-five kilometres east along the 401. Ajax is inside our normal service area and we quote it like any other job. You get an arrival window when you call. For an overnight emergency, a Durham-based company will get there sooner and we would rather tell you that than have you waiting.
Almost certainly an oversized unit, and it is more noticeable this close to the lake. Dehumidification needs run time. A system that cools the air in fifteen minutes and shuts down has not removed much moisture. Right-sizing at replacement is the durable fix, and a lower fan speed helps in the meantime.
Yes, but the layout matters. Condensing furnaces need a plastic vent run to an outside wall and a condensate drain with proper slope. In a compact wartime house that sometimes means routing through a finished area. We look at the venting path before quoting so there are no surprises on install day.
Nine times out of ten, return air. Supply registers were added when the space was finished but nothing brings that air back to the furnace, so it short-circuits through the door. Adding a return and rebalancing costs far less than a second system and usually solves it outright.
Get In Touch
Get a Free HVAC Estimate in Ajax
Tell us what your system is doing and we will get back to you fast. Same-day service available across Ajax and the GTA — or call and talk to a real person now.
Call 24/7(416) 286-5665
Rated5.0★ on Google & HomeStars
Last updated September 10, 2026