Daly Home Comfort
Based in Courtice since 2010, the company installs furnaces, heat pumps and ductless mini-splits, using Lennox and Mitsubishi equipment. It offers emergency service, and financing is offered.
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Heating and cooling emergencies in Oshawa
30 pros in Oshawa
HVAC Zack
With over 15 years in the trade, the business installs furnaces, boilers and heat pumps, including Mitsubishi systems. It works weekdays only, and free estimates are given.
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Lazzaro Gas HVAC
From Whitby, the business covers furnaces, air conditioning, heating repair and water heaters, with KeepRite, Navien and Pentair equipment. Emergency service is offered, plus a 2-year warranty.
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Pro Heating & Cooling
Serving Bowmanville, it installs furnaces and air conditioning, and it handles heating repair and water heaters. It is open seven days a week and offers same-day repairs.
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Sentinel Heating & Cooling
Located in Oshawa, the company covers furnaces, boilers, heat pumps and ductless mini-splits, and it installs generators. It offers emergency repairs, free estimates and financing.
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Sharpe Advantage Heating And Air Conditioning
Family-owned and based in Whitby, the business is open around the clock, every day, and covers furnaces, boilers, heat pumps and ductless mini-splits.
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Shax HVAC Ltd.
Its work centres on condo and commercial buildings, covering boilers, heat pumps and air conditioning. Founded in 2021, it serves Oshawa, Whitby, Ajax and Pickering.
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Advantage Airtech ClimateCare
Since 1987, it has covered furnaces, boilers and water heaters, using Lennox, Carrier and Daikin equipment. Its emergency service runs every day in Pickering, Ajax, Oshawa and Scarborough.
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Ashton Heating & Cooling
Its site centres on heat pumps, and the business also covers furnaces, boilers and ductless mini-splits, with Amana equipment. It serves Courtice, Bowmanville, Whitby and Oshawa.
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BlueGuard Duct Cleaning
Working in Oshawa, the company cleans bathroom and kitchen vent fans and whole-home ventilation systems. It addresses mould build-up, offers free estimates, and is open every day, evenings included.
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Button’s Heating & Air Conditioning
Family-owned since 1977, the business covers furnaces, heat pumps, ductless mini-splits and air conditioning, working with Trane and Daikin equipment. It runs around-the-clock service and gives free estimates.
Also serves Greater Toronto
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Forward Mechanical Plumbing and Gas
Open 24 hours, every day, it handles furnace repair, water heaters and air conditioning, plus burst pipes and basement flooding.
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Infiniti Home Comfort
Its work spans furnace and air conditioning installation, repair and service, using Carrier equipment. It serves Whitby, Oshawa and Ajax, offers emergency service and gives free estimates.
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Joe’s Heating and Air Conditioning
Founded in 1973, it handles furnace repair, maintenance and installation, with Carrier and Trane equipment. Its 24/7 emergency furnace service serves Bowmanville, Courtice, Whitby and Oshawa.
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LFZ Heating & Cooling
The company supplies and installs most major furnace brands and handles repairs, plus boilers, air conditioning and water heaters. It offers emergency appointments and a 1-year warranty, and it gives free estimates.
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Taunton Trades Ltd
With more than 25 years in the industry, the business installs and repairs HVAC systems across Durham Region, including heat pumps, ductless mini-splits and furnaces. It serves residential, commercial, industrial and institutional buildings.
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True North Home Comfort
Covering Oshawa, Ajax, Courtice, Bowmanville and Pickering, the company installs and services furnaces, central air conditioners, ductless split systems and tankless water heaters. It offers 24-hour emergency service, same-day service and financing.
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VMP HOME
Using Lennox and Rheem equipment, the Ajax business installs and repairs furnaces, boilers, heat pumps and ductless mini-splits. It is open evenings and weekends, and financing is available.
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Walchuk Heating and Cooling
Nearly 15 years in operation, the Whitby business works on furnaces, boilers, heat pumps and ductless mini-splits, using Lennox equipment. It has two Whitby locations, provides emergency calls and gives free estimates.
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AAMCO Transmissions & Total Car Care
This transmission and car care shop offers air conditioning services alongside transmission repair and brake service. It serves Oshawa, Whitby and Bowmanville, is open weekdays, and financing is available.
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AAMCO Transmissions & Total Car Care
Transmission shop whose website lists air conditioning.
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Aire One East | Whitby Furnace Repair, Heat Pump Installation & AC Services
Since 1991, the family-owned business handles furnace maintenance and repair, heat pump installation and air conditioning, with Lennox and Carrier equipment. Around-the-clock emergency service is offered, and free estimates are given.
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Climate Experts Heating & Cooling Inc.
Its core work is air conditioning installation, repair and maintenance, with ductless systems also covered. It serves Markham, Vaughan, Ajax and Pickering, and financing options are offered.
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Empower Home Comfort
Furnace, air conditioning and heat pump repair and installation, plus sump pump and drain work, for homes in Pickering and nearby. Open around the clock, every day.
Also serves Greater Toronto
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KDM Gas
HVAC contractor whose website lists furnace repairs and installs, boiler service, heat pumps and air conditioning.
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Limcan Certified Heating and Air Conditioning
Open around the clock daily, it installs and repairs boilers, furnaces and heat pumps, and it works on flooded basements. Founded in 1964, it serves Whitby, Oshawa, Courtice and Clarington.
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Pinewood Heating & Air Conditioning
HVAC contractor whose website lists furnace repairs and installs, air conditioning, heating repairs and HVAC service.
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Rodman’s Heating & Air Conditioning
Heating contractor whose website lists furnace repairs and installs, heat pumps, air conditioning and heating repairs.
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Tracey Refrigeration
HVAC contractor whose website lists furnace repairs and installs, heat pumps, air conditioning and HVAC service.
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Waza Home Comfort
Operating since 2005, it covers furnaces, boilers, heat pumps and water heaters, with Carrier and Bosch equipment. It is open seven days a week and serves Whitby, Bowmanville and Pickering.
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Not yet verified. We checked that each one’s own website offers this work, but we haven’t contacted them yet. How a business gets listed
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Before you hire
Have fuel-burning appliances such as a furnace or boiler inspected by a professional at least once a year.
Get written quotes from at least three contractors for the same work, and check references from recent clients.
Put it in a written contract: the work, price, deposit, start and finish dates, warranty, permits and clean-up. Paying cash to skip it leaves you no recourse.