Testimonials

He were very quick to respond and come to fix our AC before a long weekend. Very courteous and reasonable

We had such a great experience with Cornerstone Air today! We had the opportunity to meet Dak Jones, the founder. He was very friendly, professional, on time and thorough. We also admired the fact that he was very honest with us. We are in the process of selling our home in Frisco and we just wanted to have a peace of mind that everything was operating properly and Dak definitely put our minds at ease! We will definitely use Cornerstone Air again for our new home! Thank you Dak and to his team!

Clay and the crew were incredible. They gave first class service and we highly recommend them to anyone needing air-conditioning services.

Very pleased with the prompt, professional and friendly service Cornerstone provided

Great experience. I wouldn’t hesitate to hire them again.

I highly recommend Cornerstone Air. We had an issue with our ac not working properly. They had it diagnosed and repaired quickly. Great communication throughout the process.

I cannot recommend Cornerstone enough! They came to service my business when I needed help the most, providing a simple and cost-effective solution that got us back up and running quickly. Later, when I needed assistance at my home, they delivered swift, accurate diagnostics and fair pricing—no surprises, just great service. A special thank you to **Dak** for his outstanding customer service, clear explanations, and thoughtful guidance. He not only fixed the immediate issue but also helped me plan for preventative maintenance and future needs as my unit ages. It’s rare to find a company that truly cares about their customers and goes above and beyond. If you want reliable, honest, and professional HVAC service, look no further! —

Clayton and his team were fantastic. Clayton took the time to thoughtfully listen to my questions and concerns, explain my options, and didn’t try to hard sell me on anything. On a day approaching 100 degrees, Clayton found a way to shuffle his calendar and replace my AC unit that same day. Clayton personally oversaw the work and went above and beyond to make sure I felt comfortable with everything before he left. And now I have a five year warranty on all labor, compared to the last place I used that gave me a 1-year warranty and then didn’t honor it.

Cornerstone will be the only HVAC company I use at our home and at our commercial property. They check all the boxes-Excellent Communication; Reliable; Exceptionally knowledgeable in all aspects of HVAC!!!

Thank you so much for coming out so quickly and getting our AC going before the weekend. We appreciate it. Great service, great price.