Adrian knows his stuff, in and out. Does a great job!

Good experience. Adrian is great, nice person, professional. Fast service working off hours (nights) to troubleshoot, then next day parts and repairs (furnace). Always answered the phone. Pricing/hours as I would expect for two visits, tools, parts pickup, experience, van, and physical repairs.

Big thanks to DeMarco Mechanical Services Inc for their amazing work on our heat puump. We will be using Demarco Mechanical Services in the future.

DeMarco Mechanical Services Inc did an outstanding job fixing our AC. Reasonable And very top notch service.Thanks

DeMarco Mechanical Services Inc saved the day with their quick and reliable oven repair. Certainly a 5-star experience in my book...

I'm truly impressed with the exceptional work done on our dryer by DeMarco Mechanical Services Inc. A well-deserved 5 stars for their excellent service.

DeMarco Mechanical Services Inc exceeded all my expectations with their superior work on our dryer. They definitely deserve a 5-star rating.Thank you so much

Amazing value and quick delivery. They came to install early and worked a long day dealing with unforeseen issues with grace. It was a fantastic experience all around.

Good service & affordable price.Thanks

My mother had her gas meter replaced by enbridge gas. As a result they tagged the appliances as unsafe/gas leak and shut off gas at the meter. I called Adrian and he was out first thing the following morning and resolved the issues, inspected the lines for leaks and safety cleared the appliances. Adrian came out when he said he would, and came in just below the quoted amount. He was very professional and very knowledgeable. I would definately recommend DeMarco Mechanical for all HVAC and and natural gas repairs and installs. I could not have been more pleased. EXTREMELY HAPPY!!!. Check out his website.

We are extremely happy that we contacted DeMarco Mechanical Services. We needed quite an urgent repair/ rebuilt of a section of our gas line, and Adrian gave us an appointment within the next 48 hours. The quote was very competitive and affordable. The actual repair was scheduled in the next few days. We are very pleased that the work was done diligently and tested carefully by him in the expected timeline. Adrian has been super nice, professional and accommodating to our requests. We highly recommend DeMarco Mechanical Services to anyone who might need its expertise and assistance.

Owner John DeMarco is a great guy who knows how to run a business. What you get is guaranteed professionalism, great customer service and quality workmanship.

Truly impressed with the work done both internally and externally on my furnace repair. Also got a new boiler installed by them....

I called Demarco Mechanical Services about broken furnace; they gave me a reasonable quote for a new furnace installation. They are very professional and I will recommend this company to my friends or family.

I recently purchased a home in Markham, our furnace got louder and stopped working . On a family friend's recommendation I called Adrian who promised to be at my house the same morning .He diagnosed the issue, showed me the broken parts, and provided a fair quote. Purchased the replacement parts, completed installation, and worked without disrupting our house with 3 kids,. Truly professional. Would Recommend.

Very glad I went with DeMarco Mechanical Services Inc. Adrian installed a new combi boiler for me after my old boiler started to fail. He was willing to try and save the 37 year old boiler, but in the end, going with the new more efficient boiler was a better choice. Adrian and Amir were professional, hard working, and the system is running really well right now and mostly importantly, there is heat again :) Both were was easy to talk to and they make sure that everything will run smoothly. Thank you SO much !! Don't hesitate to call Adrian - he likes helping others and that is rare to find sometimes.

The owner was really amazing to work with. Helped my family with this combination boiler installation in my townhouse in Thornhill. Gave me really fair pricing compared to other HVAC contractors near me.

Adrian helped me with a boiler installation and 40 gallon storage tank installation in Toronto. I got quotes from several hvac contractors and Adrian was by far the most professional. Picture shows the 260,000 BTU SL G3 IBC boiler and storage tank

My rental hot water heater form Encare was leaking CO gas, and we had no hot water for almost 3 days, since Enbridge shut off our gas lines.. Encare did not care and wanted to charge us a crazy amount to find the leak, even though their equipment was faulty and we have died because of the Co2 gas! I was lucky enough to have found De Marco on google. He left his other jobs and came to repair the gas leak and brought us a new tank. I am so grateful to Adrian. he is a true professional and a gem. Never ever use Encare! Worst company.

Adrian was prompt and courteous when contacted to book an appointment to install a hookup for a gas stove. Hamid arrived on time and was professional and took the time to explain the process. He completed the work quickly and was very helpful in answering questions. Will definitely use DeMarco Mechanical for any future needs and I highly recommend them. Great service and reasonable cost. Keep up the good work !!