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

"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."

"Great folks to work with"

"Brandon did an excellent job of replacing the weatherproofing. I’m very happy with the results."

"Made appointment for them to come over for an estimate (which they charge for) between 9-12 today. They are a no show. I wasted the whole morning on them. DO NOT recommend."

"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."

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

"An excellent job putting together the large wardrobes. Arrived on time, professional, prepared, skilled and good customer service. I recommend Jose for any handyman needs, and will use his services in the future as needed. "

"Louis showed up on time and worked through the issue I was having at a reasonable rate. I will be using them again for sure."

"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."

"Extremely professional - left all areas where installs were performed cleaned and better than it originally was. They worked quick doing all the work we requested much faster than we thought! Incredibly satisfied with the results."