Best Heating & Air Conditioning / HVAC In Ontario

“Huge thanks to Jake and Ariel for the emergency electrical panel upgrade. 10/10 recommend. They kept us informed of what they had to do and how the project was progressing. Very respectful and professional. Had us back up and running without any issue.“

“We recently needed to have a complete air duct replacement of our HVAC system. Baran and Oscar did an amazing job for us. They were professional and very knowledgeable…completing the job in half a day. We were impressed with their professionalism and the steps they took to keep our home clean during and after their work was completed. Would highly recommend Diamond Air for any heating/AC needs.“

“We live in an older condo with no AC and Macawsome did a great job of working through the process with the HOA to install HVAC! We highly recommend Macawsome for your HVAC install or repair.“

“Very thorough. Aaron the technician was very attentive, answered all of our questions.“

“Steven and his helper came out and did an awesome job under my manufactured home it was tight they were under there for a while to replace rat infested ductwork he did an outstanding job I know because I did HVAC for 40 years as an installation team highly impressed I don't know about their service work but they did clean my ductwork and desanitized it It was pretty bad condition they did the best they could and went the extra mile to get what they could get very impressed“

“Sanchez and his crew were just great! They explained everything that they were going to do with the attic insulation. They sealed off all the areas and got to work. They were very thorough and clean. We felt the difference in the house in no time.“

“We love Kevin! We love M&M...we are long time customers (10+ years)...absolutely recommend.

Update 10/16: Just had the pleasure of seeing Kevin again - he is so polite and talented! We look forward to our bi-annual maintenance because of Kevin!

Update: 4/16/2026 - Kevin was here today and it was SO good to see him! He is so efficient! Plus he is truly a nice person - we've known him for around 5 years now - you're lucky if he is the one you get to service your AC unit!“

“Keeping It Cool Air Conditioning and Heating was a lifesaver for my elderly mother's home! After dealing with another company (to put it nicely—even though he doesn’t deserve it, one “gentleman”) who wouldn’t resolve the issue and was quite unprofessional, the KICHA team came in and completely took over with confidence, professionalism, and diligence. The team—especially Eddie and Tony—were amazing: thorough, professional, knowledgeable, and incredibly proactive. They quickly got to the root of the problem and had everything running smoothly in no time. It was a huge relief to finally have a team that knew what they were doing and genuinely cared about doing it right.

What meant the most was the peace of mind they brought—knowing my mother would finally be comfortable on those hot days. I can’t recommend Keeping It Cool enough!“