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Cassar Heating & Air Conditioning

HVAC Companies in Oshawa, Ontario
Ranked #2 in Oshawa | Grade A
5.00 (51 reviews)

Cassar Heating & Air Conditioning

Cassar Heating & Air Conditioning supports residential customers with heating and cooling solutions focused on clear communication and careful workmanship. Common projects include furnace and AC installs, troubleshooting and repairs, and gas line services for appliances Serving homeowners across Oshawa, Ontario.

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Why Homeowners Choose This Business

Homeowners remark on thoughtful troubleshooting, reliable arrival times, and tidy workmanship. Jobs are explained upfront and completed with attention to detail. Service is available across Durham Region with convenient scheduling Local experience that helps homeowners across Oshawa, Ontario compare a more region-aware provider.

Service Area

Oshawa, Ontario-based with coverage across Durham Region: Whitby, Ajax, Pickering, Clarington, Bowmanville, Port Perry, and Uxbridge.

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  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Holds a strong position among local competitors.
  • Performs at or above the local average rating.
  • Shows strong customer satisfaction signals based on review quality and volume.

Trust Signals

Licensing - TSSA Licence #000398183

Services Covered

  Renovation Services
  Furnace Installation
  Furnace Repair
  Maintenance
  Air Conditioner Installation
  Installations
  AC Repair
  Repairs
  Hvac Maintenance
  Gas Line Installation
  Gas Stove Hookup
  BBQ gas line
  Thermostat Replacement
  Heating Service
  Cooling Service
  Residential HVAC

Furnace and AC installation, repairs, and tune-ups; gas line installation and appliance hookups (stoves, BBQs); thermostat replacement; seasonal maintenance and safety checks.

Reviews

Customer Reviews

John Warwick
Great experience with David and team. From his patience in diagnosing the issue (thoughtful and thorough) to eventually replacing the furnace, the approach was top notch. Dave and Alex made the install as painless and seamless as possible…
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Great experience with David and team. From his patience in diagnosing the issue (thoughtful and thorough) to eventually replacing the furnace, the approach was top notch. Dave and Alex made the install as painless and seamless as possible. Highly recommended Cassar as the only choice for heating and air service.
James
Excellent service from Dave , friendly and very reliable. He installed my gas stove and did a great job. Thanks very much for your good work.
Vivian Villa
David did an outstanding job hooking up the gas to our new stove, to top it off he's courteous and punctual, will definitely be recommending him to friends and family
Jason Penney
We had an excellent experience with David for our HVAC service! He was incredibly professional, arrived on time, and left the work area spotless. His attention to detail was impressive—he thoroughly explained the work being done and ensured…
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We had an excellent experience with David for our HVAC service! He was incredibly professional, arrived on time, and left the work area spotless. His attention to detail was impressive—he thoroughly explained the work being done and ensured everything was running perfectly before he left. It's clear he takes pride in his work. Highly recommend David for anyone needing reliable and top-notch HVAC service!
Dan King
David Cassar is professional and hard working. We have worked with him multiple times over the years. He did the new install of the furnace at the old house before we moved, relocated the AC unit and this week he got our gas line out to th…
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David Cassar is professional and hard working. We have worked with him multiple times over the years. He did the new install of the furnace at the old house before we moved, relocated the AC unit and this week he got our gas line out to the new BBQ fast and it looks great. Couldn't wait to start barbaquing!! Thanks so much.

He also worked safely for himself and my family during these times, using gloves, mask and cleaning properly after the job was complete.

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Frequently Asked Questions

The team handles furnace and air conditioner installation, repair, and seasonal maintenance. They also install gas lines and connect appliances such as stoves and BBQs, along with thermostat replacements and safety checks.

Yes. Service extends throughout Durham Region, including Whitby, Ajax, Pickering, Clarington, Bowmanville, Port Perry, and Uxbridge. Availability can vary by job type and time of year.

Yes. Reviews frequently mention gas stove hookups and gas line work completed cleanly and to customer expectations. Scheduling a consultation helps confirm the scope and any permits required.

Technicians assess the existing system, explain suitable options, and provide a clear plan before work begins. Installations are performed with care, and the work area is cleaned before the team leaves.

You can call the office or use the contact options on the website to share project details. Providing model information, photos, or access notes can speed up scheduling and estimates.
 Verified Listing

Opening Hours

  • Monday Open 24 hours
  • Tuesday Open 24 hours
  • Wednesday Open 24 hours
  • Thursday Open 24 hours
  • Friday Open 24 hours
  • Saturday Open 24 hours
  • Sunday Open 24 hours

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Business Details

Business Rating
5.00 (51 reviews) Featured BusinessPro Listing
Address
Oshawa, ON L1G 6C3, Canada, Oshawa, ON L1G 6C3
Business Type
HVAC Contractor
Website
http://cassarhvac.com/
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