Professional air conditioning services from Oshawa to Clarington and everywhere in between. David and his team provide reliable AC installation, repair, and maintenance throughout Durham Region with honest pricing and same-day service when you need it most.
Professional installation of new central air conditioning systems with proper sizing, efficient ductwork connections, and warranty protection. We handle everything from permits to final testing to ensure optimal cooling performance.
Fast, reliable repairs for all makes and models of central air conditioners. From refrigerant leaks to compressor issues, we diagnose problems quickly and provide honest recommendations on repair versus replacement options.
Complete system replacement with high-efficiency units that reduce energy costs and improve home comfort. We help you choose the right size and efficiency rating for Durham Region’s climate while maximizing available rebates.
Preventive maintenance services including coil cleaning, refrigerant level checks, electrical inspections, and filter replacements. Regular tune-ups prevent breakdowns, improve efficiency, and extend your air conditioner’s lifespan significantly.
24/7 emergency AC repair service when your system fails during Durham Region’s hottest days. We prioritize emergency calls and carry common parts on our trucks to restore your cooling quickly and get your family comfortable again.
Upgrade to premium high-efficiency air conditioners with variable speed technology, smart thermostats, and advanced filtration systems. These systems provide superior comfort, lower energy bills, and qualify for maximum government rebates.
From the first call to final testing, here’s what you can expect when you choose Cassar Heating & Air Conditioning.
Reach out by phone or through our website to schedule your service. We’ll ask key questions about your air conditioning needs and arrange a convenient appointment time that works with your schedule.
David arrives on time with all necessary tools and equipment. He’ll thoroughly assess your current system, explain any issues found, and provide upfront pricing for recommended repairs or replacement options.
Once you approve the work, we complete the installation or repair efficiently and professionally. We test all components thoroughly and clean up completely, leaving your home exactly as we found it.
Your air conditioning system is running perfectly, and you’re comfortable in your home again. We provide clear warranty information and are always available if you have questions or need future service.
When it comes to air conditioning service in Durham Region, experience and integrity matter. Here’s why homeowners trust Cassar Heating & Air Conditioning.
David Cassar has been providing honest, reliable HVAC services throughout Durham Region for years. As a local business owner, he understands the unique climate challenges we face here in Ontario and takes pride in building long-term relationships with his customers.
Unlike the big companies, when you call Cassar Heating & Air Conditioning, you’re dealing directly with David – the licensed technician who will actually work on your system. This means better communication, faster service, and pricing that reflects real value rather than corporate overhead.
Every job is completed to the highest standards with full TSSA certification and insurance coverage. David stands behind his work and is always available when you need him most.
Lauren Bull
“David replaced our old air conditioner with a new high-efficiency unit and the difference is incredible. Our house stays much cooler and our energy bills dropped significantly. Professional installation and great service throughout the entire process.”
Mike Micevski
“Called David when our AC stopped working during the heat wave last summer. He came out the same day, diagnosed the problem quickly, and had us cool again within hours. Honest pricing and really knows his stuff when it comes to air conditioning.”
James S.
“David has maintained our air conditioner for three years now and it’s been fantastic. He always shows up on time, explains what he’s doing, and the system runs perfectly all summer long. Wouldn’t trust anyone else with our AC.”
Everything you need to know about air conditioner installation, replacement, and repair in Durham Region.
Air conditioner sizing depends on your home’s square footage, insulation quality, window orientation, and ceiling height. A typical 1,500 sq ft home in Durham Region usually needs a 2-3 ton unit, while larger homes may require 4-5 ton systems. Proper sizing is critical – an oversized unit will cycle on and off frequently without removing humidity effectively, while an undersized unit will struggle to maintain comfortable temperatures. The best approach is to have a professional perform a Manual J load calculation that considers all factors specific to your home. This ensures optimal efficiency, comfort, and equipment lifespan.
A well-maintained central air conditioner in Ontario typically lasts 15-20 years, though this varies based on usage, maintenance, and quality of installation. Units that receive annual professional maintenance and have their filters changed regularly tend to reach the upper end of this range. Ontario’s climate is actually easier on AC equipment than hotter regions since we don’t run our systems year-round. Signs it’s time to consider replacement include frequent repairs, rising energy bills, uneven cooling, or a system that’s over 15 years old and requiring expensive repairs. Modern high-efficiency units also provide significant energy savings compared to older models.
The decision between repair and replacement depends on the unit’s age, repair cost, and efficiency. A good rule of thumb is the “50% rule” – if repair costs exceed 50% of a new system’s price and your unit is over 10 years old, replacement usually makes more sense. Also consider that older systems often require more frequent repairs, use more energy, and may need hard-to-find parts. If your system is under 8 years old and the repair is minor, fixing it typically makes sense. For units 10-15 years old, factor in energy savings from a new high-efficiency system – the monthly savings might offset the replacement cost over time.
Central air conditioner installation in Ontario typically ranges from $4,500-$8,500 for a complete system, depending on size, efficiency rating, and installation complexity. Basic 13-14 SEER systems start around $4,500-$5,500, while high-efficiency 16+ SEER units range from $6,000-$8,500. Additional costs may apply for electrical upgrades, ductwork modifications, or challenging installations. Remember that Cassar works with a wide range of budgets and financing is available to help make your comfort investment manageable. Every job varies based on specific requirements, so the best way to know what your specific installation will cost is to get a free quote from David — no pressure, no obligation.
Yes, several rebate programs can significantly reduce air conditioner replacement costs in Ontario. The Canada Greener Homes Grant offers up to $5,000 for eligible high-efficiency systems when part of a comprehensive home energy retrofit. Enbridge Gas also provides rebates for qualifying ENERGY STAR certified units. Many manufacturers offer additional seasonal rebates that can stack with government programs. To maximize rebates, systems typically need to meet minimum SEER ratings and other efficiency requirements. We stay current on all available programs and help customers navigate the application process to ensure they receive every rebate they’re eligible for.
For Durham Region’s climate, SEER ratings between 16-20 provide the best balance of efficiency and value. While the minimum standard in Canada is 13 SEER, higher efficiency units deliver better performance and lower operating costs during our hot summers. A 16 SEER system offers excellent efficiency gains over older equipment without excessive upfront costs. Premium 18-20+ SEER systems provide maximum efficiency but may not generate enough additional savings in our moderate climate to justify the higher purchase price. The ideal rating depends on your usage patterns, home characteristics, and how long you plan to stay in your current home.
Not necessarily, but there are advantages to replacing both systems together. If your furnace is over 15 years old or showing signs of wear, coordinating replacement makes sense for several reasons: better system compatibility, potential cost savings on installation labor, and the ability to optimize the entire HVAC system for maximum efficiency. Modern systems are designed to work together more effectively than mixing old and new components. However, if your furnace is relatively new and functioning well, you can often replace just the air conditioner. A professional assessment can help determine whether your existing furnace is compatible with a new AC system and likely to provide reliable service for years to come.
Still not sure? Call David at (416) 508-4585
How to keep your air conditioning system running efficiently through all of Ontario’s seasons.
Fall is the ideal time to schedule your annual air conditioner maintenance visit. We’ll clean coils, check refrigerant levels, inspect electrical components, and ensure everything is ready for next season. It’s also important to cover or clear debris from around your outdoor unit to protect it during winter months. Replace filters and consider having ductwork inspected while the system isn’t in use.
While your air conditioner is dormant during Durham Region’s cold months, it’s important to keep the area around your outdoor unit clear of snow and ice. Avoid using heat sources to melt ice buildup, as this can damage components. If you notice any unusual sounds when testing the system during warm spells, or if animals have made nests near the unit, call for an inspection before the cooling season begins.
Spring is the perfect time to consider air conditioner replacement or upgrades before the hot weather arrives. Manufacturers often release new rebates and promotional pricing in spring, and installation scheduling is more flexible before peak season demand. If you’re keeping your current system, remove any covers, clear vegetation around the outdoor unit, and test the system on a warm day to ensure it’s cooling properly.
During Ontario’s hot summers, change your air filter monthly to maintain optimal airflow and efficiency. Keep curtains or blinds closed during peak sun hours to reduce cooling load. Set your thermostat to 24°C (75°F) when home and higher when away to balance comfort with energy costs. Clear debris from around the outdoor unit regularly and ensure indoor vents aren’t blocked by furniture or drapes for even cooling throughout your home.
Most air conditioners should be professionally serviced once a year, ideally before the cooling season begins in late spring or early summer. Regular maintenance helps prevent breakdowns, improves efficiency, and extends the lifespan of your system. During a service visit, technicians will clean coils, check refrigerant levels, inspect electrical components, and ensure optimal performance. Skipping annual maintenance can lead to higher energy bills and costly repairs down the road.
Several factors can cause an air conditioner to struggle with cooling, including dirty air filters, refrigerant leaks, blocked condenser units, or thermostat issues. Sometimes the problem is as simple as a clogged filter restricting airflow, while other times it may require professional diagnosis for refrigerant or electrical problems. If your AC is running but not cooling effectively, start by checking and replacing the air filter, then call a professional if the issue persists.
A typical central air conditioner installation takes 6-12 hours for a standard replacement, while new installations requiring ductwork modifications can take 1-3 days. The timeline depends on factors like system complexity, accessibility of the installation area, and whether electrical upgrades are needed. Most straightforward replacements where existing ductwork is in good condition can be completed in a single day.
The decision depends on your system’s age, the cost of repairs, and overall efficiency. If your air conditioner is over 10 years old and repair costs exceed 50% of replacement cost, a new system usually makes more sense. Consider that newer units are significantly more efficient and reliable than older models. Also factor in the frequency of recent repairs – multiple service calls often indicate it’s time to upgrade to avoid ongoing headaches and expense.
For Durham Region’s climate, a SEER rating between 16-20 offers the best balance of efficiency and value. While the minimum standard in Canada is 13 SEER, higher efficiency units (16+ SEER) provide better cooling performance and lower operating costs during hot Ontario summers. Premium units with SEER ratings of 20+ offer maximum efficiency but may not provide enough additional savings to justify the higher upfront cost in our moderate climate.
Professional air conditioning installation, repair, and maintenance available across all Durham Region communities. Click any location below for local service information and area-specific details.
Same-day service available across all of Durham Region. TSSA certified. Honest pricing. No surprises.
