The Best HVAC Company in Mississauga and the GTA
EcoFrost has run TSSA-certified furnace, AC and heat pump service across Mississauga and the GTA since 2015. Authorized Lennox dealer, HRAI member, 80+ 5-star Google reviews, same-day dispatch with $0 overtime fees.
11 Years
Serving the GTA since 2015
2,500+
Installs completed
80+
5-star Google reviews
4.8
Average Google rating
Credentials That Matter in Ontario
Anyone can call themselves an HVAC company. These are the credentials Ontario homeowners should verify before they hire anyone.
TSSA Certified Contractor
Ontario's gas-equipment regulator licenses our team to install and repair every residential gas system.
Authorized Lennox Dealer
We chose Lennox as our preferred partner because their efficiency and quiet operation lead the industry.
HRAI Member
Heating, Refrigeration and Air Conditioning Institute of Canada membership means our trade practices meet national standards.
G1 and G2 Gas Licensed
Every tech on our crew holds the gas licenses Ontario requires for residential furnace and water heater work.
Why GTA Homeowners Pick EcoFrost
Six concrete reasons that show up on the invoice, not in the marketing.
Same-Day Dispatch Across the GTA
We staff for emergencies. Most service calls get a real arrival window in seconds, not a vague 8-hour bracket. Our trucks roll out of Mississauga every morning to Toronto, Brampton, Oakville, Burlington, Vaughan, Markham, Richmond Hill, Hamilton, Milton and Etobicoke.
$0 Overtime Fees, Ever
Nights, weekends, holidays. Our rate stays the same. Other contractors charge 1.5x to 2x for after-hours calls. We do not, because emergencies do not pick business hours.
Flat-Rate Pricing in Writing
We diagnose first and quote before any parts go in. No surprise add-ons at the end. You see the full price in writing and approve it before we start the repair.
Rebate Paperwork Handled For You
Enbridge, Canada Greener Homes and the federal Oil to Heat Pump Affordability program stack to over $10,000 in some heat pump installs. We complete and submit every form on your behalf at no extra cost.
TSSA Red Tag Removal
If another contractor or the gas utility red-tagged your furnace, we offer a free second opinion and remove the tag the same day when the equipment is safe to operate.
10-Year Labour Warranty on New Installs
Our labour warranty doubles the typical industry coverage. Combined with the manufacturer's parts warranty, you are protected for a full decade after install.
What Our Customers Say
Real reviews from GTA homeowners who trust EcoFrost
4.8
Google Rating
80+
Happy Customers
Joe Cabral
3 years ago
Ecofrost installed a new air conditioner for us in late August. Our 23 year old AC finally gave out. Nisar quoted us a very good price on a Lennox. They were able to install it the next day. They were very professional and knowledgeable and we are very happy with the service that was provided. It is nice to have a great company that you can count on in the community.
Verified Google Review
Prashant Agrawal
4 years ago
I am extremely pleased with Nisar and his team for the professionalism, a mind for customer satisfaction, attention to detail and last but not least their focus on completing the job with precision and due care. Nisar came in with knowledge and patience to answer all my questions and got us the best deal on AC.
Verified Google Review
Susie
4 years ago
What an amazing experience with this company at a time where I was really helpless! My furnace finally went down after 22 years and this company took all my worries away! They responded immediately, came up with a plan and stuck to it by being on time, professional, friendly, kind, and patient.
Verified Google Review
EcoFrost Serves 11 GTA Cities
Our trucks dispatch from Mississauga every morning. Pick your city for local neighbourhood coverage and dispatch times.
Recent EcoFrost Projects
We complete 250+ installs every year across the GTA. Real before-and-after photos coming soon. Ask to see project photos during your free in-home consultation.
Mississauga - Erin Mills
Lennox SLP99V furnace replacement
22-year-old unit replaced, family back in heat in 4 hours, $1,200 in rebates handled.
Toronto - North York
Mitsubishi Hyper-Heat install
3-zone ductless system, $9,000 in stackable rebates applied, electric bill down 35 percent.
Oakville - Glen Abbey
Tankless water heater conversion
Old 50-gal tank swapped for Navien tankless, $1,000 Enbridge rebate handled, endless hot water.
Brampton - Heart Lake
Central AC replacement
16 SEER2 Lennox AC installed, 0 percent financing for 6 months, completed same day.
Vaughan - Woodbridge
Heat pump install with rebates
Cold-climate Lennox heat pump, $10,000 in combined rebates handled, zero out-of-pocket after grants.
Hamilton - Ancaster
Furnace red tag removal
Free second opinion after gas utility red-tagged a 14-year-old unit, heat exchanger inspection cleared, tag removed same day.
Ready to Book the Best HVAC Team in Mississauga?
11 years of TSSA-certified service across the GTA. Same-day dispatch, $0 overtime, flat-rate pricing.
See all 11 GTA service areas or view transparent 2026 pricing