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At Sisemore Services, we're proud of our years of service to the Sherman area and look forward to helping you with your air conditioning and heating needs. We're pleased to serve both residential and commercial customers; our team is prepared to help you with the sales, service, and installation of the comfort system that is ideal for your home or business.

And be sure to ask Sisemore Services for a free estimate. Whether it's a new installation or routine service, our factory-trained technicians provide the expertise your comfort depends on.
Reviews (7)
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Sam Johnson
Jul 10, 2020
I really thought service of this type was gone for good from this world! If i could give 10 stars I would. Always go over and above! I will be a customer for life! Best mechanical company out there!
Laura Hayes
Jul 03, 2020
AMAZING! We had a very difficult job- old house - orange berg pipe- under a detached garage -complicated by a very large pecan tree- and worse, the city of Denison in no hurry to put in a new tap. Brad and crew knew what to do, how to do it. and fast! Highly recommend this company and capable crew. Thank you guys, sincerely. I AGAIN can't say enough about these people!

My Old house (1930) started smelling like poo. my cast iron pipes had cracked and I didn't know it! Mark and Cole to the rescue. couldn't believe the lengths these guys were willing to go to.to find and fix. crawling under my house. tight squeeze. they found four cracks. showed me all of them. as they found them. then went above and beyond. I had some stuff out of code. they knew I want to sell in a couple years. so they fixed that too! Love this company!
Major Bob
Dec 04, 2019
They were very considerate to my problems during a busy holiday time. I could not have asked for better service and they were reasonable. Highly recommend.
Scott Buckman
Nov 28, 2019
Very happy service on the phone. They could help me at the time I needed there service they was booked up the day I needed them. but they recommended another company to help me so I could them who they recommended they help me with my issues at home. Thanks Nancy for all your help and helping me to get my issues resolved. Maybe next time for your services.
L. K.
Nov 02, 2019
We were having significant problems with both our heating and A/C. Sisemore came in, looked at the current situation, and came up with a solution that was not only NOT an un-needed up-sell, but one that worked in our budget, resolved the issues we were having, and improved the overall quality of heat the furnance is providing. It was a pleasure working with Brad, it is very clear he loves what he does! Thank you!
Rance Davis
Aug 05, 2018
I have had more than one occasion to call Sizemore. They are honest, priced fair and respectable while on site and on the phone. You won't do better in Grayson county.
Mary Jones
Dec 31, 2017
Excellent, fast and reasonable service! My technician, Robert Buck, was very prompt, courteous and resolved the issues I requested and also repaired another problem in my master bath. I will certainly use this company again and recommend them to my friends.