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Browse the Top 345 HVAC Contractors Serving Ontario, ON

See what 345 HVAC contractors serving Ontario, ON, including Mississauga, Brampton and Concord, offer for scheduled heating and cooling work and urgent repairs. Read customer feedback, explore business profiles and contact providers that match your HVAC requirements.
Ajax (1)
Alliston (1)
Ancaster (2)
Arnprior (3)
Aurora (3)
Aylmer (1)
Ayr (1)
Bancroft (1)
Barrie (8)
Beaverton (1)
Belle River (1)
Belleville (2)
Bolton (3)
Bowmanville (1)
Bracebridge (1)
Brampton (15)
Brantford (3)
Breslau (1)
Brockville (1)
Burgessville (1)
Burlington (3)
Caledonia (1)
Cambridge (5)
Campbellcroft (1)
Carleton Place (1)
Carp (1)
Cavan (1)
Chatham (5)
Concord (11)
Corbeil (1)
Cornwall (2)
Cottam (1)
Courtice (1)
Courtland (1)
Dorchester (1)
Drayton (1)
Dunrobin (1)
East Garafraxa (2)
Elmira (1)
Embrun (2)
Erin (1)
Essex (1)
Etobicoke (8)
Fenelon Falls (2)
Georgetown (1)
Grand Bend (1)
Gravenhurst (1)
Greater Sudbury (1)
Greely (2)
Grimsby (1)
Haileybury (1)
Haliburton (1)
Hamilton (5)
Harrow (1)
Hartington (1)
Hawkesbury (1)
Hearst (1)
Hensall (1)
Huntsville (3)
Ingersoll (1)
Inglewood (1)
Innisfil (1)
Kanata (1)
Kingston (4)
Kitchener (3)
Kleinburg (2)
L'Orignal (1)
Lansdowne (1)
Leamington (2)
Lindsay (2)
Listowel (1)
Lively (2)
London (7)
Markham (10)
Maryhill (2)
Midland (3)
Milton (2)
Mississauga (22)
Moose Creek (1)
Mount Forest (1)
Navan (1)
Nepean (7)
Newmarket (1)
Niagara Falls (1)
North Bay (1)
North York (9)
Oakville (6)
Odessa (1)
Oldcastle (1)
Orillia (2)
Orleans (1)
Oshawa (2)
Ottawa (8)
Owen Sound (1)
Palmerston (1)
Pembroke (1)
Penetanguishene (1)
Peterborough (6)
Pickering (2)
Picton (1)
Port Hope (2)
Prescott (1)
Renfrew (1)
Richmond (1)
Richmond Hill (3)
Saint Catharines (3)
Saint Isidore (1)
Sarnia (2)
Sault Sainte Marie (1)
Scarborough (8)
Selwyn (2)
Severn (1)
Simcoe (2)
Southampton (1)
Stevensville (1)
Stirling (1)
Stittsville (1)
Stoney Creek (2)
Stratford (4)
Strathroy (1)
Sydenham (1)
Thedford (1)
Thornhill (2)
Thornloe (1)
Thorold (1)
Thunder Bay (2)
Toronto (10)
Trenton (3)
Tweed (1)
Utopia (1)
Uxbridge (1)
Vaughan (2)
Wainfleet (1)
Wallaceburg (1)
Wasaga Beach (2)
Waterloo (5)
Welland (2)
Whitchurch Stouffville (1)
Williamsburg (1)
Windsor (10)
Woodbridge (4)
Woodstock (1)
Not rated yet
Alliance Energy Source
27 Years
Emergency
Not rated yet
24 years of specialized HVAC experience serving the GTA
Trusted HVAC contractors in Newmarket, ON. Specializing in furnace, AC, and boiler installation, repair, and maintenance with 10-year warranties and same-day service.
Furnace Repair AC Installation Boiler Services
(905) 470-7555 Call Profile
Not rated yet
Valley Home Services
Emergency
Not rated yet
Certified technicians with 10+ years of HVAC expertise
Valley Home Services offers reliable HVAC repair, installation, and maintenance in Arnprior. Certified technicians provide 24/7 emergency service, lifetime warranties, and affordable financing for residential and commercial heating and cooling systems.
AC Repairs Furnace Installation HVAC Maintenance
(613) 623-4081 Call Profile
Not rated yet
Aircom Heating & Cooling Systems
33 Years
Emergency
Not rated yet
TSSA-certified professionals with decades of industry experience
Trusted TSSA-certified HVAC contractor serving Southern Ontario. Expert repairs, maintenance, refrigeration, and energy-efficient systems for commercial and industrial clients. 24/7 emergency service available.
HVAC Repairs Commercial Refrigeration DX Piping
(905) 790-1309 Call Profile
Not rated yet
A Plus Quality
Emergency
Not rated yet
25 years of HVAC expertise in Toronto's climate challenges
Expert HVAC solutions in Toronto since 1998. Residential & commercial heating, cooling, and air quality systems. 24/7 emergency service. Carrier President's Award winner. Serving GTA since 1998.
Furnace Repair Air Conditioning Boiler Services
(905) 822-4328 Call Profile
Not rated yet
Ottawa Home Services
23 Years
Emergency
Not rated yet
24/7 emergency HVAC service since 2003 with BBB A+ rating
Trusted Ottawa HVAC contractor offering furnace repair, AC installation, boiler services, and 24/7 emergency support. BBB A+ rated since 2003 with transparent pricing and certified technicians.
Furnace Repair AC Installation Water Heater Services
(613) 714-9734 Call Profile
Not rated yet
MARCH MECHANICAL
45 Years
Not rated yet
Family-owned HVAC expertise since 1981 with geothermal specialization
Trusted Milton HVAC contractor since 1981. Geothermal heating, Carrier furnace installation, and air quality solutions. Energy-efficient HVAC systems for year-round comfort.
HVAC Installation Geothermal Systems Air Conditioning
(905) 875-2700 Call Profile
Not rated yet
Controlled Comfort Air
Emergency
Not rated yet
We offer 24/7 emergency HVAC services with guaranteed scheduled appointments.
Toronto's most trusted HVAC contractor offering 24/7 furnace and AC services, installations, and maintenance. Over 50 years of experience, 100% satisfaction guarantee.
Furnace Installation AC Installation Duct Cleaning
(416) 531-9191 Call Profile
Not rated yet
Central Plumbing & Heating
50+ Years
Emergency
Not rated yet
73 years of family-owned expertise in plumbing and HVAC systems
Trusted plumbing, heating, and fire protection services in Stoney Creek since 1950. Central Plumbing & Heating offers 24/7 emergency support, certified technicians, and guaranteed workmanship for residential, commercial, and industrial clients.
Residential Plumbing Commercial HVAC Fire Protection
(905) 527-2406 Call Profile
Not rated yet
Special Gas Services
50+ Years
Emergency
Not rated yet
Family-owned since 1968 with 55+ years of HVAC expertise
Trusted HVAC services in Brampton since 1968. Special Gas Services offers furnace, AC, and pool heater installation, repair, and maintenance with 24/7 emergency support.
Furnace Installation AC Repair Pool Heater Services
(905) 451-9081 Call Profile
Not rated yet
RS Mechanical
Emergency
Not rated yet
We offer 24/7 emergency HVAC services with rapid response times
Trusted HVAC contractor serving Brampton with installation, repair, and maintenance services for residential and commercial properties. 24/7 emergency support available.
Air Conditioning Heating Systems Refrigeration
(647) 294-5231 Call Profile