DeMarco Mechanical offers residential and commercial HVAC installation, repair, replacement, maintenance services, and more across the GTA and York Region: Downtown Toronto, North York, Etobicoke, Scarborough, Thornhill, Markham, Richmond Hill, Vaughan, Concord, Aurora, Woodbridge, Maple, King City, Newmarket, Stouffville, Pickering, Ajax, Whitby, Oshawa, and the surrounding areas.
Reviews ( 232 )
Adrian previously installed a new gas line and a new gas oven… I was so impressed with his professionalism, knowledge and the fact he took additional precautions to protect our property… he came to our home the next day, purchased the AC unit and made the whole process stress-free and seamless.
I had an issue with a gas leak in my home. Contacted DeMarco Mechanical and they came out right away, found multiple leaks and fixed everything. Got the gas back onto our house within a few hours. Really thankful—they are so professional and quick to respond.
After years of patchwork repairs on our ductless split system, we called DeMarco Mechanical. They provided a thorough inspection, offered a reasonable recommendation, and completed a quality heat pump installation. Their follow‑up service was top‑notch, and they left the entire place spotless. Excellent customer service from start to finish!
Adrian installed a brand-new air conditioning unit and impressed us with how cleanly everything was done—no damage to drywall, no mess left behind. He clearly explained how the system worked and answered all our questions. The installation was stress‑free, prompt, and competitively priced. Highly recommend!
When our home’s gas line needed repair, Adrian and his team responded right away and resolved the issue within just a few hours. They were extremely knowledgeable, thorough in explaining the problem, and handled everything with professionalism and care—plus, the pricing was fair. Couldn’t ask for better service!
DeMarco Mechanical was a lifesaver when our gas furnace gave out in freezing weather. Adrian arrived on time, wore full PPE during Covid, and clearly explained every step. Their professionalism and speedy response turned a stressful situation into a smooth fix.
Adrian’s hands-on approach is a breath of fresh air. He listens, explains all options without pressure, and ensures systems are engineered for efficiency. Trustworthy and skillful—just what HVAC service should be.
They installed a tankless water heater when ours failed. It’s been flawless. The workmanship was excellent, and Adrian’s recommendations were spot-on.
Quality preventative maintenance! DeMarco’s annual tune-up caught minor issues before they escalated, keeping our HVAC system efficient and worry-free all winter.
Adrian engineered the perfect system for our home — a new furnace and AC. The price was fair, work was meticulous, and the team was courteous. Highly professional from quote to cleanup.
Their AC installation was top-tier. They even hid mechanical components neatly, offered a smart thermostat, and showed me all energy-saving features. Clean, informative, and professional!
We had a tricky gas-line repair that no one would touch. DeMarco Mechanical scheduled us within 48 hours, gave a fair quote, and tested the repair carefully. Friendly, accommodating service – highly recommended.
After struggling with our old ductless AC for years, Adrian suggested a new heat-pump split system. His team installed it flawlessly, cleaned up thoroughly, and now our home stays perfectly cool year-round.
DeMarco Mechanical was a lifesaver when our gas furnace gave out in freezing weather. Adrian arrived on time, wore full PPE during Covid, and clearly explained every step. Their professionalism and speedy response turned a stressful situation into a smooth fix.
Adrian and the DeMarco Mechanical team are exactly what every homeowner hopes for — trustworthy, experienced, and genuinely friendly. We’ve hired them for both residential and commercial work, and they’ve never let us down. Adrian goes above and beyond to make sure the work is done right the first time. We appreciate their dedication and wouldn’t hesitate to recommend them to anyone looking for quality mechanical services
I’ve worked with a few HVAC and mechanical companies before, but DeMarco Mechanical Services truly sets the bar higher. From the first call to the final inspection, their team was prompt, professional, and incredibly thorough. They diagnosed an issue with our furnace that others had missed, saving us from a costly replacement. It’s clear they care more about quality and long-term solutions than just making a quick sale. Highly recommended for anyone who wants honest work and peace of mind.
I’ve used DeMarco for both residential and commercial jobs, and they’ve never let me down. Their knowledge and attention to detail are unmatched. Whether it's a quick repair or a major installation, they handle it all with skill and professionalism. It’s rare to find a company this consistent — DeMarco has definitely earned a lifelong customer in me.
From booking the appointment to completing the job, DeMarco Mechanical Service made the whole process smooth. They installed our new HVAC system with absolute precision, and the difference in air quality was immediate. The team worked cleanly and efficiently, and left our home spotless. Excellent customer care and real craftsmanship — they truly go above and beyond.
DeMarco Mechanical Service came through when we needed them most! Our AC went out in the middle of a scorching week, and they had a technician at our door within hours. The tech was professional, respectful of our space, and explained everything clearly. The fix was quick and the price was fair. Can’t recommend them enough — reliable and trustworthy from start to finish!
Nguyen Phuong Hai Quynh
James Ralston
D Smith
Mark Willdosen
Ali
Michael L Breen
Margarita Jose
After many years of issues with our ductless split AC… we decided to go with a new ductless split heat pump installation. The installation team was really good—they did a fantastic job, with great customer service and spotless cleanup afterward. Very happy with the level of service.