Get matched with top thermostat installers and replacers in Bethesda, MD

"Great folks to work with"

"I appreciate the experience, expertise, knowledge and integrity of this business. The home I live in is very old and I am a renter with very little knowledge of HVAC services. Sean, the serviceman, explained clearly what the issue was with the furnace and even provided advice regarding CO detectors, that I should have more than one. I am very grateful for the service he provided and I definitely recommend his company."

"Woke up this morning to my hvac leaking and contacted Markool. I have never used them before and was in a pinch. They fit me right in this morning and were out at my house within 2 hours. The tech stepped in the door and placed covers for his shoes so he did not track in any dirt which was impressive! The tech was very professional and super friendly. Problem was diagnosed and FIXED within an hour. The price was extremely reasonable to the point I was shocked in a good way (expecting a higher price). Anyways, I will most certainly be a returning customer. Thank you Markool Heating Cooling Plumbing."

"Absolutely smooth and professionally completed."

"They first charged me an outrageous amount to figure out why my door was leaking and didn?t. They sent someone else to look at it. Who did figure out what was wrong . When they did come to fix the door, they did good work, but they charged me an outrageous amount of money to do it. They quoted me as having to rip up my whole deck to replace flashing. But when they came out to do it, they only had to pick up a couple boards .and redo the frame on a door and they charge me an astronomical amount of money. I am not happy. I will not be using them again. "

"Bobby was very professional and easy to work with. He did an outstanding job on our project."

"The project is complete as expected."

We pride our company on reliability, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your heating and or cooling project.

"I had an excellent experience with Kevin. He installed a very large and complex crystal chandelier in our foyer, and the entire process was handled with exceptional professionalism and precision. This was not a simple installation,the chandelier is heavy, intricate, and required careful assembly and mounting at a significant height,but he approached the job with patience, attention to detail, and clear expertise. He took the time to ensure every component was perfectly aligned and secure, and the final result looks absolutely stunning. The installation was done safely, efficiently, and with great care for our home. I would highly recommend him to anyone needing electrical work, especially for challenging or high-end lighting installations. Truly outstanding workmanship."

"Amazing! Surley is incredibly talented, responsive, professional and dependable! He performs exceptional work that is skillful and always well done. Highly recommend for all kinds of work!"