Superb. Knowledgeable. Diligent. Thorough. Efficient. Everything you'd expect from a proper contractor. Goes above and beyond to ensure things are properly done and working.Update March 2025: Used Andrew again to install a condensing tankless water heater with natural gas. There should be an additional star or two here for professionals who do a stellar job each and every time. He certainly deserves it. Less

Amazing service. Professional, courteous, very knowledgeable. Fair and reasonable pricing. All confirmed upfront - no surprises. Definitely will use again. Less

We recently had a tankless water heater installed at our home. We cannot express highly enough the service we received from Andrew. He not only did a great job of installation, but was ever mindful our needs. His professionalism was evident, yet he presented himself in a personable manner with any questions asked readily answered. We would highly recommend ACM services for their expertise and care of the customer. Less

Andrew was super professional, reliable and polite. He diagnosed the issue with my furnace quickly and got it working again in no time. Would absolutely recommend his services. Less

Andrew is really ' one and the only ' . Thorough gentleman . He explained in detail everything . Was not rushing to get the job done , though it was late evening appointment . He is my man for any thing related to HVAC .Job well-done Andrew . Less

First off I’m not a family member or friend of the company owner or employees. I chose ACM mechanical of Oakville based on their 5 star rating and the fact the manufacturer of my water tank suggested them.my hot water tank was 16 years old and I was getting brownish discoloured water in my washing machine and dishwasher. I spoke to Andrew about my options and chose to go with a new replacement tank. The job was scheduled a few days later.On the day in question arriving on time, what a breath of fresh air, old school work ethic and professionalism using drop cloths throughout. Changed out the tank and upgraded the valve to the humidifier and added grills on the outside vent pipes. The guys completed the job in a timely manner, were respectful of our property leaving the area clean and tidy. I have no hesitation in using this company again and agree with previous reviews that they deserve 5 stars. Well done Andrew and a sincere thank you. Less

Andrew from ACM Mechanical did an excellent job fixing our vent pipe. He was professional, efficient, and thorough, ensuring everything was properly repaired. I will definitely use his services again. Thank you, Andrew! Less

I had ACM in my house in Oakville to replace my furnace , a/c and water heater and I am very glad I hired them ! They were professional from start to finish, kept me updated on everything and cleaned up at the end . I would highly recommend them to anyone . Less

Andrew did a great job. He was prompt and had great communication. We had an issue with a cool living room even though our heat was turned on. We just couldn’t figure it out. Andrew came over and diagnosed the problem within minutes. Our living room is now nice and toasty again. Thanks, Andrew. Less

I've used ACM Mechanical a couple of times now. Andrew is reliable, honest and will be trusting him with all my HVAC needs. Used his services in the summer as I had an A/C issue of water pooling up, he came the very next day, correct the problem. The second time was due to a heater issue, heating stopped and the house cold. I called ACM mechanical, Andrew arrived first thing in the morning the next day, and was able to diagnose the issue and fix it in under and hour. I would highly recommend using ACM mechanical, incredibe service. Less

Andrew:“Andrew did an outstanding job fixing my gas fireplace. His expertise and attention to detail transformed my fireplace into the cozy, efficient feature I always wanted. He was punctual, professional, and left everything spotless. Five out of five stars!” Less

We received such great service from Andrew Mota. He resolved our problem as fast as he could. He was very attentive, courteous and we highly recommend him. Less

I recently had Andrew install a smart thermostat, and I couldn’t be more pleased with his service. From start to finish, he was incredibly friendly and professional, making the whole process a breeze. Andrew arrived on time, got straight to work, and completed the installation seamlessly. I would highly recommend Andrew to anyone needing HVAC services. Less

I can’t say enough good things about Andrew and the service he provided! He was absolutely amazing—thorough, professional, and incredibly knowledgeable. He took the time to explain everything in detail, which was so helpful since I am not familiar with furnaces. What could have been a stressful situation felt surprisingly comfortable thanks to his patience and clear communication. On top of the exceptional work, Andrew is a genuine person, which made me feel confident that I was in good hands. If you need furnace repair or replacement, I highly recommend him without hesitation. Trustworthy, reliable, and someone you can count on. Thank you Andrew! Less

Andrew was absolutely fantastic. Very knowledgeable and helped explain what was going on throughout the whole furnace installation. Highly detailed and dependable!! Less

It was a pleasure working with Andrew for our HVC serving followed by replacement of our old water heating tank with a tankless heater. He was quick in responding and thorough in getting us all the information we needed.We will surely keep working with him again. Less

Exceptional Service! Andrew exceeded my expectations with his expertise and professionalism. He arrived early to repair our water heater and not only resolved the issue quickly but also took the time to explain the root cause in detail. His thorough approach and valuable advice left me feeling confident in the quality of his work. He also fixed our fireplace and gave me excellent information about its operation. His ability to handle multiple issues efficiently and share his knowledge really sets him apart. I highly recommend Andrew and will definitely be reaching out for future needs regarding our AC and furnace. I’ll be recommending him to my friends as well! Less

Andrew really stepped up for us! Our AC unit died on a Sunday and by Monday we had a new one installed and up and running . Thank you so much, we really appreciated your honesty , communication and hard working ethic. We will definitely recommend your company to others ! Less

Incredible service from Andrew and team! Within 24 hours, the ACM Team quickly got to our place to assess our AC unit after it broke down. Not only did they prevent a potential fire hazard, but they were able to replace our old broken unit SAME DAY! Perfect timing to save us and our dogs from the Fall heat wave! Great communication throughout the whole process - we will definitely be using their services again. Less

Cannot recommend ACM Mechanical enough. Called them on a Sunday night around 9PM with an emergency HVAC unit replacement.. they were on site with the new unit by the next afternoon. My house now has AC!!!!! Phenomenal customer service and quality service. 1000%%% recommend. Less

We have recently completed the construction of our very custom home. It required a very specific HVAC engineering plan. This plan was designed and revised with the input from our Architect, HVAC Engineer, and several Mechanical Contractors. Unfortunately, we had not been introduced to Andrew from ACM, until the system had been installed. However, Andrew added a feature to our home, and also took care of the gas lines for the kitchen and BBQ. Andrew was the "best" person to communicate to us how everything operates. That means in plain English that we could understand. His pricing is most reasonable compared to others, and his availability was much better than any other Trade we dealt with. Overall, we have been so impressed with Andrew that we invited him to our home now that we are moved in, and asked if he would check all the mechanical. He did so, and gave us such reassurance that we asked him if he would be our exclusive Technician and Service person. Carte blanche we are entrusting him with our safety and comfort from here forward. Thank you Andrew for providing us with this total peace-of-mind. Less

I couldn't be more grateful for Andrew at ACM Mechanical. We had a very complicated scent problem from fabric softener in a new home we moved into. We needed remediation for health reasons and severe allergies. Fabric softener dust basically got everywhere in the home, including throughout our ventilation. Andrew helped thoroughly assess our situation. He continued to problem solve with us and our team as we moved forward. His insights were so critical in figuring out what to do from a decision making standpoint. As part of the project, he installed a merv 11 5" filter in our furnace along with a 3 stage hepa air purifier that attached to our furnace. This has taken our hvac system to a much higher level of performance for clean air. He was extremely professional in every respect. Thank you Andrew for all you did for my family! Less

I have used Acm several times and I have never been let down. Andrew is a great human being with a lot of experience and attention to detail. I have recommended his company to everyone I know. I can’t preach enough. Less

Andrew was courteous and knowledgeable. He arrived on time and completed the work as scheduled. We would definitely call him back should we need any other work done. Less

Andrew was a pleasure to work with from the moment we met him , he was polite, courteous and had very fair prices , he's work was clean and neat highly recommend ACM mechanical Less

Had a hot water tank switched out.Could not be happier with all aspects of this interaction with ACM. The work was thorough and was above and beyond expectations. Will definitely call them back when I need anything else mechanical. Less

Andrew and his team installed a new furnace and added some ductwork. The work was clean and high quality. Andrew took his time to answer all my questions right after. Overall, I was satisfied with their professional service and the price was on point. Less

It was such a great experience having Andrew take care of our HVAC needs. His communication was excellent and made it easy to coordinate. I will happily work with him on future projects. Less

Andrew and his guys provided exceptional service. He was on time for the quote and installed our air conditioner in one day! Pricing is on point! Highly recommend! Less

Very pleasant to work with and patient to answer all my questions before I committed to buy a tankless water heater. On installation day, Andrew arrived early and did a perfect job to remove the old and install the new water heater Less

Had a great experience with ACM. Andrew and his team uninstalled an old A/C unit and installed a brand new one hassle free. They also repaired a blower issue we had been having with our ducts. Cannot recommend ACM enough: Honest, thorough, punctual, friendly and affordable. Thank you for the great work! Less

Andrew assisted me with an issue without even having to visit my home! He talked me through it, and he solved the problem. This was so generous and helpful. I would definitely use this company again and again for any HVAC concerns!! Less

We are incredibly pleased with the ACM Mechanical's exceptional service, from their prompt response to their thorough and efficient work. Their expertise and professionalism has made a significant difference in our comfort and satisfaction with our home's cooling system. Less

Me and my wife are pleased with an excellent service we received from Andrew. He was on time as promised. He was friendly, knowledgeable and provided service in a professional manner. He fixed the issue that we had with our fireplace pilot. He explained everything he had done in detail. We would highly recommend ACM Mechanical, Andrew for all of your gas service needs. Keep up the great work! Ned from Oakville Less

Andrew is consistent and extremely helpful. He has helped us with new furnace and with semi annual maintenance. He's available on short notice and always responsive. Less

One of the best referrals I have received. Andrew is the answer when it comes to cooling and heating. A very honest, genuine, knowledgeable and trustworthy professional who makes you feel comfortable and relaxed that your issues are going to be fixed. For some of us who have had bad experiences with the trade professional we see Andrew as the answer. A new unit installed efficiently and you have another happy customer. Not sure when I'm going to need your services next but one thing I'm sure of is that I'm going to keep your contact. Less

I had an issue with my Google Nest thermostat and reached out to Andrew through Facebook Marketplace. Andrew was incredibly helpful and guided me through resolving the problem without charging me a single penny. His timely responses and excellent suggestions were invaluable. Not only is he a knowledgeable and skilled mechanic, but he's also a wonderful person. I highly recommend Andrew for any thermostat issues you might have. Thank you, Andrew, for your exceptional service! Less

I was thoroughly impressed with Andrew. He demonstrated remarkable creativity in redirecting air returns that needed rerouting and relocating a supply vent. He responded promptly on the same day and began making repairs immediately. Andrew is not only highly professional but also genuinely pleasant to interact with. He consistently goes above and beyond, treating your home with the same care and respect as if it were his own. The prices are fair and he makes you feel like a priority. Less

Andrew was really professional, knowledgeable and honest on his quote and service. He walked me through the service he did in our furnace and answered all my questions. I’d certainly recommend his services to anyone. Less

Outstanding service. Knowledgeable, efficient and reasonable fees. Have already recommended your service to a few friends. Very thankful to have found you. Less

I gave Andrew a call and left a voice mail when my furnace failed to give out hot air. Andrew was quick to reply to my call and he came to check out my furnace within 2 hours of my call to him. He quickly diagnosed the problem, provided a fix and proceeded with solving the problem. He was very good at explaining the problem to me and we even discussed the cause of the issue so that such a problem could be avoided in the future. While waiting for the furnace to heat up, he even took care of a housekeeping task that I had failed to do. I was really impressed with Andrews's knowledge, skill and the willingness to go that extra mile. I highly recommend Andrew for all your Furnace needs. Less

Andrew is the HVAC technician you can trust! He recently serviced my unit, and I couldn't be happier with the results. His expertise and professionalism are truly commendable. I highly recommend Andrew for all your HVAC needs. Less

I tired to install my nest thermostat on my own, ended up making a mess and wiring everything completely wrong. Called Andrew on Thanksgiving for a quote to install my thermostat and he ended up helping me through the entire installation process. It’s great to know there’s still amazing people in this world. Highly recommended Less

Andrew was a thorough professional and completed the HVAC as part of our main floor renovation. He worked out solutions to our satisfaction in rerouting the supply & returns to ensure no bulkheads in our open floor concept. We also used his services to install a power vent water heater. Andrew is patient, trustworthy , accommodating & a pleasure to work with. We highly recommend him & would definitely work with him for any future project. Less

I had the pleasure to have ACM Mechanical in my home installing my new furnace. From the quote process to install Andrew was 100% professional keeping in mind about the correct products to be installed and services to be performed without upselling. I highly recommend his services. Less