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 75 reviews Posted on Sylvia LandOctober 10, 2025Trustindex verifies that the original source of the review is Google. Reliable, competent and hard working.Posted on CoreyOctober 2, 2025Trustindex verifies that the original source of the review is Google. Zack and his crew were fantastic! They removed our old hot water tank and installed a new top-of-the-line tankless water heater quickly and efficiently. Zack was knowledgeable, easy to communicate with, and his pricing was very competitive. Couldn’t be happier with the service and happy to not have to rent a tank anymore. Will be using HVAC Zach again in the future for some upgrades to our cottage. Thanks again guys!Posted on Michelle RobertsOctober 1, 2025Trustindex verifies that the original source of the review is Google. Zack was amazing - he was able to fit is in quickly and diagnosed/fixed our furnace right away.Posted on MSeptember 27, 2025Trustindex verifies that the original source of the review is Google. Hvac Zac is a true professional, he did all new duct work for our home remodel and garage conversion, and also saved us thousands of dollars by being a trustworthy contractor. The motor on our furnace burnt up and died on us randomly, he was kind enough to look the part up, saw it was still under its warranty period and got us a free replacement. Any other contractor would have just upsold us on new parts or furnance, but he was honest! A+++ recommend his work!Posted on Laura LongmanSeptember 9, 2025Trustindex verifies that the original source of the review is Google. Zack was easy to communicate and coordinate with. Very pleased with the install and would recommend him.Posted on Vince BaioSeptember 3, 2025Trustindex verifies that the original source of the review is Google. Great price great service. Zack is very clean when he works and very knowledgable.Posted on Suzanne PeatAugust 1, 2025Trustindex verifies that the original source of the review is Google. The Best! HVAC ZACK was originally recommended to us by a colleague. He rescued us last summer and rescued my Mother and Brother this summer! Respectful, responsive and reasonable! Kind and considerate. We would recommend HVAC ZACK over and over again.Posted on Laura BaileyJuly 31, 2025Trustindex verifies that the original source of the review is Google. Zack and his apprentice are extremely professional, reliable and honest. My husband and I are really happy with HVac Zack and highly recommend them. Zack takes pride in ensuring him and his team provide a great service. Thank you Zack!Posted on Wilma KulykJuly 24, 2025Trustindex verifies that the original source of the review is Google. We heard about Zack last year and asked him to come to our home for a cleaning. We spoke to him about the terrible air-flow and circulation both summer and winter. Zack recommended HVAC repairs to improve our airflow. We are so pleased with his work, and the difference in our home is incredible. Thanks Zack for your great service!!!