Cassar Heating & Air Conditioning provides expert tankless water heater services throughout Durham Region, from installations and upgrades to emergency repairs and annual maintenance. Our TSSA certified technicians deliver reliable, energy-efficient solutions that provide endless hot water for your home.
From new installations to emergency repairs, we handle every aspect of tankless water heater service across Durham Region.
Professional installation of new tankless water heater systems, including gas line upgrades, proper venting, and TSSA compliance. We size your system correctly for unlimited hot water demand.
Expert diagnosis and repair of all tankless water heater issues including no hot water, temperature fluctuations, error codes, and component failures. Same-day emergency service available.
Complete removal and replacement of old tankless units with new high-efficiency models. We handle proper disposal of old equipment and ensure seamless transition to your new system.
Comprehensive maintenance service including descaling, filter cleaning, combustion analysis, and safety inspections. Regular maintenance extends equipment life and maintains peak efficiency.
24/7 emergency service for tankless water heater failures. No hot water situations are prioritized with same-day response throughout Durham Region, including evenings and weekends.
Upgrade to the latest high-efficiency condensing tankless models with advanced features like WiFi connectivity, precise temperature control, and maximum energy savings. Rebates often available.
From your first call to enjoying unlimited hot water, here’s what to expect when you work with Cassar.
Contact us at (416) 508-4585 or book online. We’ll discuss your hot water needs, current system, and schedule a convenient appointment time.
David assesses your home’s hot water demand, existing gas lines, and space requirements to provide an accurate quote with no surprises.
Professional installation or repair with proper permits, TSSA compliance, and thorough testing to ensure your system operates flawlessly.
You’ll have unlimited hot water, lower energy bills, and the peace of mind that comes with professional installation and ongoing support.
Local expertise, honest service, and professional results you can count on.
David Cassar founded Cassar Heating & Air Conditioning to provide Durham Region homeowners with honest, professional HVAC service they can trust. As a TSSA certified technician with over a decade of experience, David has built his reputation on transparency, quality workmanship, and fair pricing.
Unlike large companies that push sales quotas, David takes the time to properly assess your home’s needs and recommend the best solution for your situation and budget. Whether you need a simple repair or a complete tankless water heater installation, you get David’s personal attention and expertise on every job.
Based in Durham Region and serving all local communities, Cassar Heating & Air Conditioning is your trusted local HVAC partner. We’re here when you need us most, with emergency service and the knowledge to get your tankless water heater working reliably.
Real reviews from local customers who’ve experienced our tankless water heater service.
“David installed our new tankless water heater and the difference is amazing. Unlimited hot water and our gas bill actually went down. He explained everything clearly and the installation was clean and professional.”
“Our tankless water heater stopped working on a Sunday morning. David answered his phone and had us up and running the same day. Honest pricing and quality work – highly recommend Cassar.”
“David replaced our old tankless unit with a newer high-efficiency model. Great job sizing the system correctly – we never run out of hot water even with teenagers in the house!”
Everything you need to know about tankless water heaters in Durham Region, from how they work to costs and installation requirements.
Tankless water heaters heat water on-demand as it flows through the unit, rather than storing hot water in a tank. When you turn on a hot water tap, cold water flows through the unit where a gas burner or electric heating element rapidly heats it to your desired temperature. This provides unlimited hot water while using 24-34% less energy than traditional tank water heaters.
Complete tankless water heater installation in Ontario typically ranges from $3,500-$6,500, including the unit, gas line upgrades if needed, proper venting, and professional installation. High-efficiency condensing models may cost more but qualify for rebates. However, Cassar works with homeowners across all budget ranges and financing options are available. The best way to know what your specific job will cost is to get a free quote from David — no pressure, no obligation.
Absolutely, when properly sized for your home’s specific needs. David calculates your peak hot water demand by considering simultaneous usage — multiple showers, dishwasher, washing machine, etc. Most homes need units capable of 6-8 gallons per minute flow rate. Unlike tank water heaters that can run out, a correctly sized tankless unit provides unlimited hot water at consistent temperature.
Most tankless water heaters require larger gas lines than traditional tank units — typically 3/4″ or 1″ compared to the 1/2″ lines that feed tank water heaters. This is because tankless units have higher BTU demands (150,000-200,000 BTU vs 40,000 BTU for tanks). David assesses your existing gas infrastructure during the quote and includes any necessary upgrades in the installation cost.
Tankless water heaters use 24-34% less energy than conventional tank water heaters because they eliminate standby heat loss. For an average Durham Region home, this translates to $150-300 annually in energy savings. High-efficiency condensing models can achieve even greater savings. The exact savings depend on your household’s hot water usage patterns and current energy costs.
Tankless water heaters typically last 20+ years with proper maintenance, compared to 8-12 years for tank water heaters. This longer lifespan, combined with energy savings and unlimited hot water, makes tankless units an excellent long-term investment. Regular annual maintenance including descaling and filter cleaning helps ensure maximum lifespan and efficiency.
Yes, high-efficiency tankless water heaters often qualify for rebates through Enbridge Gas and other utility programs. ENERGY STAR certified condensing models typically qualify for the largest rebates. Rebate amounts and availability change regularly, so David stays current on all available programs and helps you apply for any rebates you qualify for to reduce your net installation cost.
Ontario’s climate presents unique challenges for tankless water heaters. Here’s how to keep your system running efficiently through every season.
Schedule annual maintenance before heating season begins. Fall is the ideal time for descaling, filter cleaning, and combustion analysis. Check venting for obstructions from leaves or debris. Ensure your unit is ready for increased hot water demand during colder months when heating costs rise.
Watch for error codes, inconsistent temperatures, or reduced flow rates that indicate potential freeze protection issues or component stress. Durham Region’s cold temperatures can affect venting and intake air. If your unit displays error codes or fails to provide consistent hot water, call for immediate service.
Spring is the perfect time for tankless water heater replacement or upgrades. Milder weather makes installation easier and you’ll have the new system optimized before summer demand increases. Take advantage of spring rebate programs and prepare for the year ahead with a properly sized, efficient system.
Summer’s lower hot water demand is ideal for major maintenance or repairs. Schedule descaling if you have hard water, check and clean air intake screens, and verify proper operation before fall heating season. Summer is also the best time for installations with minimal disruption to daily routines.
Yes, tankless water heaters are particularly worth it in Durham Region given our climate and energy costs. They last 20+ years vs 8-12 for tank units, use 24-34% less energy, and provide endless hot water on demand. While upfront costs are higher, the long-term savings and space benefits make them an excellent investment for most homes. Durham Region’s hard water does require regular maintenance, but the overall benefits far outweigh this consideration.
Complete tankless installation in Durham Region typically ranges from $3,500-$6,500, including the unit, gas line upgrades if needed, venting, and labour. Price varies based on unit size, complexity of gas line work, and specific installation requirements. High-efficiency condensing models may cost more initially but often qualify for rebates. David provides detailed quotes with transparent pricing and no surprises.
A properly sized tankless unit absolutely can handle multiple simultaneous uses. The key is correct sizing based on your home’s peak demand. David calculates this during the quote process, considering simultaneous shower usage, dishwashers, washing machines, and other hot water needs. Most Durham Region homes need units capable of 6-8 gallons per minute flow rate to ensure your unit never runs short during peak usage.
Most tankless units require 3/4″ or 1″ gas lines to handle the higher BTU demand, compared to the 1/2″ lines typically feeding tank water heaters. Tankless units use 150,000-200,000 BTU vs 40,000 BTU for tanks. David assesses your existing gas line during the quote and includes any necessary upgrades in the installation cost. All gas work is done to TSSA standards with proper permits and inspections.
Most tankless water heater installations take 4-8 hours, depending on complexity. Simple replacements where gas lines are adequate take less time, while new installations requiring gas line upgrades, new venting, or electrical work may take a full day. David provides realistic timeframes during the quote and schedules installations to minimize disruption to your daily routine. Emergency replacements can often be completed same-day.
Professional tankless water heater installation, repair, and maintenance service available throughout all Durham Region communities. Same-day emergency service and TSSA certified technicians in every area we serve.
