DeMarco Mechanical offers quality heating and air-conditioning services in all of Oshawa and the surrounding Greater Toronto Area. For the best services, environmentally friendly HVAC systems and Ontario’s Save on Energy Program accommodation, you can make your home more efficient and environmentally friendly while saving money. DeMarco specializes in quality systems, excellent customer service, and competitive rates. For excellent service in the Oshawa region and further, don’t hesitate to contact DeMarco Mechanical.


Energy Efficient HVAC Systems: The city of Oshawa recommends purchasing ENERGY-STAR® labeled products for your home, to maximize your energy efficiency and save on energy. Ontario’s Save on Energy Home Assistance Program can help you replace your old HVAC systems, reduce your home and businesses power consumption and more.

Learn more about tax rebates and financial assistance offered by your region by visiting Oshawa Environmental tips for energy conservation. Or you can learn more about our Energy Star Products by calling our company or visiting our website.

  • A Reduction in Your Monthly Bills: DeMarco’s skilled technicians and professionals will work with you to find heating and air conditioning systems that work with your space and needs, minimizing energy consumption, lowering your carbon footprints and raising your home or businesses energy efficiency. With our help, you can significantly lower your monthly energy bills, and pay for your new heating or cooling system many times over throughout its lifespan. Call us today for quality heating and cooling services in Oshawa.


Our licenced technicians aim to provide you with the best customer service alongside a service tailored to your individual needs. We offer a huge variety of brands and customized services. This way, we ensure each job we complete results in 100% customer satisfaction. We are passionate about what we do, which is why we stand behind every repair, installation or replacement we do and offer continuous support beyond the job for your benefit.

  • Oshawa Wide Service: We serve all of Oshawa as well as the rest of the Greater Toronto Area. Our far reach and wide service area allow us to provide our customers with superior HVAC products throughout the entirety of Southern Ontario. We service and install the following major brands:
    Rheem, Trane, Goodman, York, Mitsubishi, Daikin, Bryant, Lennox, Keeprite, Coleman, American Standard, Amana and much more. We offer AC repairs, installation, furnace repairs and upgrades and more of best in class HVAC contracting services.


Demarco Mechanical offers general, repairs, replacements and parts and full installation of water heaters, air conditioners, heating systems, ventilation and air purification systems. Our teams are dedicated and licensed, offering high-quality professional services which are custom tailored to your individual needs. We guarantee the highest standards of service and the best appliance brands and parts. With our expertise and services, your HVAC needs will be solved in no time. Our company is happy to take on commercial or industrial projects as well as residential ones. We believe in creating lasting relationships with our customers, which is why we offer multi-equipment discounts, service contracts, and highly competitive rates. Visit our website today for more information about our company and what our customers say about us.


For a free estimate, or to request a visit, please give us a call or send us an email at: (416) 820-9155  or