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"I’m back again to write another stellar review for GAC. Last year they replaced our HVAC system; this year we circled back and had them install a home generator. This was a long and drawn out process due to the various approvals needed from Montgomery County as well as coordination with Washington Gas (which ended up not just being a simple sign off but necessitating an additional, expensive upgrade to the gas line from the street to our home). Nevertheless, GAC did a fantastic job shepherding this process over the 6+ months of waiting on stakeholders, and they were also maximally accommodating to our family’s significant constraints on time and availability (due to health concerns related to a medically fragile family member). A special kudos to Sandy M, GAC’s master electrician, who took it on personally to ensure we were taken care of all throughout this process, going above and beyond with phone calls, text messages, personal visits, etc. on behalf of my family, I want to thank GAC and am giving top marks across the board for this effort which was complex , lengthy, and ultimately successful."

"The installation team of Eric and Dan were professional and diligent at their work. My son was the one to deal with the institution team. He has over 30 years of experience in the appliance business and knew something about what was being done. He told me that the institution team was doing a great job. I'd definitely recommend them to anyone that's in need of their services. Namcy T. French"

"The installer was very efficient and when finished, he explained everything. Very pleased!"

"Adam was so helpful explaining how the ductless heater/ac unit would fit in my sunroom. His three workers were great. Cleaned up the area after they finished, the job was done in about 4 hours. Got three estimates and Weather Masters was the lowest and could install the next day. I also decided to sign a contract for seasonal checkups on my furnace and central air conditioner. I think anyone would feel comfortable hiring them."

"Called Tri State to check out our A/C unit when the central air failed last August. After replacing a burned out capacitor and refilling the Freon, the leak identified by the technician (Anders) turned out to be larger than hoped, and the new refrigerant all dissipated within 3 days. Ultimately, worked with Darren Viands at Tri State to replace the entire HVAC system (which was at the end of it's useful life anyway). To his credit, he answered all my large and small questions, making certain I was well-informed enough to be comfortable with the investment in my chosen equipment. (I had not heard of Daikin previously.) The install went smoothly and was completed in one day, as promised. The crew - Sonny, Dale and Chad - were on time, worked quietly and continuously, and were helpful in answering any lingering questions. I also appreciated that they did not leave a mess. The furnace installation passed the city gas inspection with flying colors. There was a slight issue with a loose piece of metal that interfered with the thermostat battery, which was discovered a few days later, but the entire thermostat was replaced promptly following a phone call to the service manager, Laura. A portion of the cost of the original service call, minus materials, was credited towards the new equipment purchase, which was very decent and helpful. The A/C unit has been running quietly in the background for a month; seamlessly switched over to heat this week with no issues. All in all, I'm very pleased with the work Tri State did and the professional manner of everyone we had contact with. Time will tell if the product itself is as good as the installation."

"Of the five bids I received, Michael Bonsby Heating & AC company proposed the best value for the price. From start to finish, through removal of the old furnace to installation & operation of the new furnace, the service technician was knowledgable & experienced in doing the work, and helpful in answering questions and explaining the use and operation of the new furnace. The office staff was also responsive and courteous whenever I called with questions or scheduling of installation. I'm very satisfied with this company and recommend them highly."

"Drew did an excellent job installing our chandelier."

"This was a combination Carrier Furnace/AC installation. The sales rep and technician were extremely professional, helpful, The installation was performed the next day. I highly recommend."

"Very professional. I would highly recommend for repair and installation of new systems."

Whether you need a repair, preventive maintenance, or replacement, we are your plumbing, heating, and air conditioning service provider in the northern Virginia and surrounding areas. We invite you to give us a call!