Gaithersburg Hvac contractor

Having a thermostat professionally installed was a game changer. The technician was prompt, arriving within 20 minutes of the scheduled time, and was incredibly knowledgeable. Now, my home feels perfectly cozy with minimal effort on my part.

Trustworthy and efficient, the technician ensured our A/C ran smoothly with meticulous attention to detail. Arrived promptly and completed everything within an hour. Highly recommend!

Replaced worn fan belts on our older commercial rooftop unit. Tech brought the exact OEM belts and adjusted tension perfectly. Quiet and efficient operation restored.

Elmer is fantastic and professional. He installed a heat pump for a brand new second zone and replaced our 33 year old gas furnace for the main level. He explained everything he was doing along the way and truly taught me a lot about my home's HVAC and how to care for it. Highly recommend working with Elmer as he is a true craftsman and his attention to detail shows in his work.

I would not let anyone other than Elmer Slack ever touch my HVAC. Not only is he highly talented, experienced, capable and conscientious, and watching out for my wallet, he is also warm and personable and a very good person to have in your "back yard." He is so good that he is entertaining, and makes an art of science while he makes everything right. I cannot recommend him highly enough. In fact, I hope no one ever reads this, because I consider him a well-kept secret. Dave Tabor