Markham's Trusted
HVAC Specialists
Unionville to Cornell — Markham's trusted HVAC specialists.
Furnace installation, AC repair, heat pumps, and 24/7 emergency service across all Markham communities. Lennox Authorized Dealer · TSSA Licensed · Fully Insured.
Serving Markham Since 1999
HVAC Service Built for Markham Homes
Markham is one of Canada's most diverse cities — a dynamic mix of heritage neighbourhoods like Unionville and Markham Village alongside newer master-planned communities like Cornell, Berczy Village, and Cathedraltown. Global Comfort Air has been serving Markham homeowners for over 25 years.
Whether you need a new Lennox furnace for a Berczy Village home, a heat pump for a Cornell townhome, or emergency AC repair in Unionville, our TSSA-licensed technicians are ready to help — fast and professionally.
What We Do
Complete HVAC Services in Markham
Every service backed by Lennox factory warranties, TSSA-licensed technicians, and 25+ years of local expertise.
Furnace Installation & Repair
High-efficiency Lennox furnace installations, same-day repairs, and annual tune-ups for Markham homes — from established neighbourhoods to newer subdivisions across the city.
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Air Conditioning
Central AC installation, repair, and maintenance. Stay comfortable through Markham's warm summers with a properly sized, energy-efficient system.
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Heat Pumps
Year-round comfort with energy-efficient heat pump systems — eligible for Canada Greener Homes and Enbridge rebates for Markham homeowners.
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Humidifiers & Air Quality
Whole-home humidifiers and air purifiers to combat dry winters and improve indoor air quality in your Markham home.
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24/7 Emergency Service
24/7 emergency heating and cooling service across Markham. We respond fast — nights, weekends, and holidays.
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Preventive Maintenance
Annual HVAC maintenance plans to keep your system running efficiently and avoid costly breakdowns throughout the year.
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Save Up to $10,000+
Markham Homeowners:
Don't Leave Rebates on the Table
We handle all the paperwork — you collect the savings.
Claim Your RebatesWhy Markham Chooses Us
The Global Comfort Air Difference
Markham Community Expertise
We know Markham's diverse communities — from the heritage homes of Unionville to the master-planned communities of Cornell and Berczy Village. We tailor every HVAC solution to your specific home.
Lennox Authorized Dealer
Access to the full Lennox product lineup with factory warranties and exclusive dealer pricing unavailable at big-box stores.
TSSA Licensed Technicians
Every technician is TSSA licensed and WSIB covered — fully qualified to work on gas appliances in Ontario.
24/7 Emergency Response
No heat in January? No AC in July? Our emergency line is answered around the clock, every day of the year across Markham.
Rebate Assistance
We handle the paperwork for Canada Greener Homes, Enbridge, and Ontario rebate programs — Markham homeowners often save $1,000–$5,000+.
5,000+ GTA Installations
Over 25 years and 5,000+ installations across the GTA — our track record speaks for itself.
Local Coverage
Markham Communities We Serve
Customer Reviews
What Markham Homeowners Say
“Global Comfort Air replaced our old furnace in our heritage Unionville home. They were careful, professional, and the new Lennox system is incredibly quiet and efficient.”
“Installed a Lennox heat pump system. The team was knowledgeable about the Canada Greener Homes rebate and helped us save significantly. Excellent service from start to finish.”
“Emergency AC repair on a hot summer day — they arrived within 3 hours and fixed the issue quickly. Fair pricing and very professional. Will definitely use again.”
Common Questions
HVAC Questions from Markham Homeowners
1How much does furnace installation cost in Markham?
Furnace installation in Markham typically ranges from $2,500 to $5,500 depending on the efficiency rating (80–99% AFUE), unit size, and installation complexity. After Enbridge Gas rebates of up to $1,000, net costs are often lower. Global Comfort Air provides free in-home estimates with no obligation.
2How quickly can you respond to a heating or cooling emergency in Markham?
We aim to respond to emergency calls in Markham within 2–4 hours. Our dispatch team is available 24/7 including weekends and holidays.
3What rebates are available for HVAC upgrades in Markham?
Markham homeowners may qualify for Canada Greener Homes grants (up to $5,600), Enbridge Gas rebates of up to $1,000 for high-efficiency furnaces, and Ontario Home Efficiency Rebate Plus incentives for heat pumps. Global Comfort Air handles all rebate paperwork on your behalf.
4What warranty comes with a new HVAC system installed in Markham?
Lennox equipment installed by Global Comfort Air comes with a 10-year parts warranty and a 10-year heat exchanger warranty when registered within 60 days. We also provide a 1-year labour warranty on all installations. Extended warranty options are available.
5How long does HVAC installation take in Markham?
A standard furnace or AC replacement in Markham typically takes 4–6 hours. A full system replacement (furnace + AC) usually takes one full day. We work efficiently to minimize disruption and leave your home clean.
6Can you service the heritage homes in Unionville and Markham Village?
Yes — we have extensive experience with older homes in Unionville and Markham Village. We carefully assess each home's existing infrastructure and recommend the most appropriate, code-compliant solution.
Also Serving
All GTA & Southern Ontario Service Areas
Ready for Reliable HVAC Service in Markham?
Call us today for a free in-home estimate or book online. Same-day and emergency appointments available across Markham.