Testimonials
I highly recommend B D Mechanical for all your commercial needs. The owner/partners have a combined 40+ years of experience. I manage over 150k sq ft and over the years they have proven to be responsive, honest and knowledgeable with their craft. Performing everything from basic maintenance to complex install jobs.
Came out promptly, very professional and fair. Gave me all my options and gave a thorough explanation of each. Definitely my new go to HVAC company.

A1 quality, experience & service
Arrived in the time window that I was told, and provided professional and top quality service. Thank you!
We had a time sensitive issue that was very complicated. We had another company out the day before and after hours of trying to get the new smart thermostat installed, they eventually gave up. We needed to switch out to a smart thermostat to get a lower kilowatt rate through our electric company. Then we reached out to Big D Mechanical and they were able to arrive within hours of calling them. The current wiring on our thermostat system made this more difficult. Cliff at Big D did an AMAZING job and never gave up! He is a true problem solver and we are thrilled to have our smart thermostat installed and working to be able to get the lower kilowatt rate through our electric company. SO GRATEFUL!!!⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️ THANK YOU BIG D!!!!
Couldn’t be happier with the service we received! They showed up on time and were honest and direct. It’s hard to find workers like this these days!!
Great service! I highly recommend them as an HVAC contractor in North Dallas! Extremely professional and easy to contact.
Awesome guys! Very knowledgeable and efficient! Took the time to explain the issues to me instead of blowing off my questions! Thank you!!! Highly recommend this company !!!
What excellent service! John came out and fixed out AC during one of the hottest days this year. My unit went out twice, and the first time out they were able to get is back up and running with a minor fix, but I do not think we caught it in time. The damage to the unit was a bit more than we thought and the motor went out two weeks after the we replaced the start capacitor. It was not an issue for Big D and his Crew! John was right back out here the day that it went out and replaced the motor and a few other components to get us back up and running. I think we have a year left before it just will need to be replaced When it is time for a new AC unit, we are only going to Big D Mechanical for our HVAC needs!
Great service! Professional, knowledgeable, responsive, and quick to fix the problem. Highly recommend!