Durham Region's Trusted Heating & Cooling Expert
- Based in Oshawa - service from Pickering to Bowmanville
- Expert with Durham’s older homes and new builds
- Backed by decades of hands-on HVAC experience
- Licensed and insured to ensure your safety

Hi, I'm Zack - owner and operator of HVAC ZACK.
With over 15 years in the heating and cooling industry, I’m proud to bring hands-on expertise, meticulous workmanship, and a commitment to fair, honest service to every home I work in across Durham Region.
As a licensed and insured HVAC professional, I specialize in heat pumps, furnaces, air conditioning, tankless water heaters, and more — treating every project like it’s for my own family, because doing right by my clients matters most.
Services
Heating & Cooling Services
Everything you need from heating your house in the winter, cooling it in the summer and making it comfortable in-between!
EXCELLENT Based on 104 reviews Posted on Google Jonathan WhittakerAugust 15, 2026Trustindex verifies that the original source of the review is Google. We had an excellent experience with HVAC Zack, and I couldn't recommend Zack and his team more highly. Our expectations were exceeded from beginning to end. We recently had two Mitsubishi Hyper-Heat systems installed in our home—one 3-zone system and one 2-zone system, for a total of five indoor units. We weren't sure which HVAC solution or equipment would be best for our needs, so we relied heavily on Zack's expertise. He took the time to understand what we wanted, provided a detailed quote, explained our options, and recommended a solution that gave us the improvements we were looking for without spending more than necessary. The difference in comfort throughout the house has been HUGE. We had significant temperature differences between rooms with our old system, and that problem has essentially disappeared. We've only had the new systems for about two months, but we've already experienced some significant heat waves, and the units have kept the house remarkably cool and comfortable. In fact, they work so well that we've found ourselves keeping them at lower settings because running them too high can actually make the house colder than we want! The installation itself was excellent. Zack did a substantial amount of the work personally, including working in the attic and handling the electrical work, while his apprentice assisted with various tasks under Zack's direction. Everything was done very professionally, neatly, and with minimal disruption to our home. The entire installation took about two and a half days, and the cleanup was extremely thorough. Both Zack and his apprentice were friendly, polite, and respectful throughout the entire process. They were also fantastic with our two dogs and cat, which was especially appreciated! Zack also went above and beyond in ways we didn't expect. He agreed to remove all eight of our old electric baseboard heaters at no additional cost. That was a huge help and saved us the hassle of having to arrange that separately. Another major plus was Zack's help with the government rebate. The rebate was a significant relief and provided us with substantial savings on the overall cost of the upgrade. Zack guided us through the process and handled a large portion of the rebate work on his end, making something that could have been complicated and stressful much easier for us. What impressed us most was that Zack never made us feel like he was simply trying to sell us the most expensive system. He listened to what we needed, explained the options, and recommended what he believed would give us the best value. His knowledge, professionalism, attention to detail, and willingness to go the extra mile really stood out. We are extremely happy with the decision we made and with the work HVAC Zack performed. If you're considering a heat pump or HVAC upgrade, I would absolutely recommend giving Zack a call. We couldn't be happier with the result and would give HVAC Zack 5 stars without hesitation!Posted on Google MBAugust 12, 2026Trustindex verifies that the original source of the review is Google. Very professional team, quality installation, on time with delivery and reasonable pricing. I highly recommend HVAC Zack.Posted on Google Jacob TannerAugust 11, 2026Trustindex verifies that the original source of the review is Google. Zack was great. He got back to me quickly during his busy period (many thanks!), diagnosed the problem, and then completed the work quickly. All for a great price! I was happy with his professionalism, and he manages to bring a great personality to each job (I have also used him in the past).Posted on Google Omar El GamalAugust 5, 2026Trustindex verifies that the original source of the review is Google. AC broke during heat wave, everyone else was quoting ridiculous numbers and suggesting I buy a new unit. Zack provided no nonsense quote, right to the point and fixed it. It’s been running great since. Def recommendPosted on Google Brian FarrisAugust 5, 2026Trustindex verifies that the original source of the review is Google. Zack came to check out our a/c unit on short notice, was very professional, and managed to diagnose and fix our unit the same day at a very fair price. I will be recommending him in the future.Posted on Google Paul CloughJuly 9, 2026Trustindex verifies that the original source of the review is Google. We recently had Zack replace our furnace, A/C and switch to a tankless water heater, and I couldn’t be happier with the experience from start to finish. From our very first meeting, Zack took the time to understand not only what equipment we needed, but also our future plans for the basement renovation. He made thoughtful recommendations on the placement of the tankless unit and routing of the mechanicals so they would work well with our future layout. That attention to detail really stood out. The quality of the installation is excellent. Everything is clean, neat, and professionally done, and it’s obvious he takes pride in his workmanship. Even small details like the venting, piping, and overall organization of the mechanical room were completed with care. What I appreciated most was Zack’s patience and willingness to answer questions. I enjoy understanding how things work, and he never made me feel like I was asking too many questions. He explained the system, walked me through the EcoNet thermostat, and made sure I was comfortable with everything before leaving. We did run into an issue commissioning the A/C, but Zack was upfront about it, returned promptly, corrected it properly, and made sure everything was operating exactly as it should before considering the job complete. That level of honesty and professionalism gave me even more confidence in his work. It’s not often you find someone who combines technical knowledge, quality workmanship, and great customer service. Zack was an absolute pleasure to deal with, and finding trustworthy contractors can be stressful, but Zack earned our confidence from day one. I wouldn’t hesitate to recommend him to family and friends.Posted on Google Bernie KirckJuly 2, 2026Trustindex verifies that the original source of the review is Google. Zack was unbelievable and extremely knowledgeable with all the questions i gad. The work was done to perfection and the job done 100% satisfied, thanks Zack and JasonPosted on Google Christine MorleyJuly 1, 2026Trustindex verifies that the original source of the review is Google. Zack is very honest and is extremely knowledgeable. I wouldn't trust anyone else to work on my HAVC system!Posted on Google Jim JohnJuly 1, 2026Trustindex verifies that the original source of the review is Google. Zack is a great communicator and showed up when he said he would, the job got done right so that’s all anybody can ask for! I definitely recommend Zack.Posted on Google Roberta ReynsJune 2, 2026Trustindex verifies that the original source of the review is Google. Zach provided absolutely amazing HVAC service! He is incredibly knowledgeable, professional, and took the time to make sure everything was running perfectly. The quality of his work is outstanding and he is an absolute pleasure to deal with. I couldn't be happier with the results and highly recommend him to anyone needing HVAC services. 5/5!