HVAC Repairs
From sweltering summers to freezing cold winters, the team at Drennen Mechanical Inc. has over ten years of experience repairing HVAC systems and can provide an expert assessment of your unit’s malfunction.
HVAC Installation
We provide quality installation of all HVAC systems, ensuring the system is perfect for your residential or commercial space and its heating & cooling requirements.
HVAC Maintenance
Our expert team ​​is highly skilled at performing thorough and meticulous maintenance inspections to keep your HVAC system in good shape for years to come.
About Us
Oklahoma City’s Most Trusted HVAC Provider Since 2011
Hvac Expert

​​As a family-owned and operated business for over ten years, Drennen Mechanical Inc. is dedicated to providing exceptional Heating, Ventilation and Air Conditioning services as well as outstanding customer service. Proudly serving the Oklahoma City, Edmond, Norman, Choctaw, and Harrah areas, here at Drennen Mechanical, we don’t just want you to think of us as a business but as a contributing member to our great community.

  • As a registered and insured business, we employ a tight-knit team of qualified professionals that you can trust without having to worry about potential liabilities. 
  • Our skilled contractors are dependable, trustworthy and always show up on time, ready to work. 
  • We offer free estimates and full transparency on all of our HVAC services.
  • All of our projects are completed using only the most premium tools and materials.
  • We provide fast and efficient services 365 days a year, with no exceptions.
Latest News
Whether you need quick tips on all things HVAC maintenance or want to stay informed and up to date on the latest trends in the HVAC industry, Drennen Mechanical’s regularly scheduled blog posts are here to help. Get updates on heating and cooling maintenance, energy trends and insights, new HVAC technology, detailed reviews, and more to help keep your commercial or residential space at its optimal comfort level.
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Our Customer Reviews
Here’s what our customers have to say about our service!
I called late and spoke with an actual person who helped me trouble shoot before scheduling an appointment. Arrived ahead of schedule and were very professional. Cost of repairs was...
- S mog
Warren is literally a life saver. I have used him multiple times over the past few years and he is always very upfront with me about what my issue is...
- Amanda Wilder
These men are top notch , professional, on time. They get the job done right ,the first time . I would recommend there service , to anyone needing HVAC service.
- William Billings
These guys installed a tankless water heater for me. They were professional and a affordable.
- Jonathan Duncan
Great deal at a very hot time in the summer. Thank you for working on such an old unit and not trying to sell me a new one.
- Jo Stroud
On more than one occasion these guys have saved my butt! Warren always thoroughly checks everything when he comes to fix my home or work units. He has never no...
- Krista G

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