Best Heating & Air Conditioning / HVAC In Rockville

“Mr Dalton did a thorough job assessing possible problems and explaining the possible solutions. I will monitor the services provided to see if further work will need to be done. But on the whole he was pleasant and very thorough.

Mr Shah did a thorough job of checking my HVAC system. He shared needed repairs and in the order they should be addressed. There was no pressure to do anything immediately even though I paid for one service. The professionalism of the company and Mr Shah is refreshing but the prices for services especially for seniors is a bit high.“

“I can only review Bryan Argueta, a senior technician who quickly and very professionally resolved several issues with an earlier installation job on two new fancoil units. He also completed a regular maintenance assessment on two older fancoil units. He’s thorough, methodical, and excellent at explaining both the work he’s doing and ongoing maintenance needs. Would definitely work with him again.“

“The technicians were very knowledgeable and the repairs and improvements were needed to avoid any future water problems.
I give thanks for their excellent service.“

“I had a great experience with David Ford. Craig was a pleasure to work with and great with keeping me up to date on everything“

“Very Thankful for brandon summer for the second diagnose he is very good and kind very knowledgeable and professional as well.“

“Knowledge and professional, experienced technicians, great job replacing my two 3 ton HVAC systems“

“Excellent AC service! My AC had a problem, and they came out on the weekend to check it, which I really appreciated. Luckily, it was still under warranty, so they were able to come back early the next morning and fix it quickly. The technician was professional, knowledgeable, and explained everything clearly.

I was very grateful for the fast and reliable service, especially during the heat and humidity.

Great experience from start to finish. I would definitely recommend them to anyone who needs AC service!“

“I have used Gaitan Services LLC for my home HVAC issues. Nelson has been very thorough in his job with attention to detail to resolve the issue. He even suggested improvement to resolve reoccurring issue from condensate drain that I really liked his idea and got it implemented. Gaitan Services is a trustworthy company who goes above and beyond to deliver first class service to earn customer satisfaction and future businesses. I highly recommend their services for anyone looking for skilled HVAC and Refrigeration tech.“

“This is a highly professional company, communication with their office, technicians and estimating is top notch. The employees are responsive, polite and very helpful. This is a rare occurrence in this industry and makes them really stand out from the competition.“

“2026-05-17: Just had to take a moment to share my experience with Donmar Heating, Cooling & Plumbing. From an HVAC service visit, cracks in the heating exchanger were discovered. Because of inflexibility with additional needed services involving the water heater and sump pump, I began obtaining price quotes from other services. Michael W. quickly came out, listened to and addressed ALL of my concerns, assessed the physical situation, and provided a very reasonable quote of proposed services. Michael W. was instrumental in establishing a RELATIONSHIP where trust, integrity, and honesty reside as the foundation. Financing was easy and reasonable. Donmar's customer service was truly exceptional.
Donmar's service technicians, Manuel and Edgardo, were nothing short of awesome!! They paused to listen to me and patiently and thoroughly addressed all of my questions and concerns. From their arrival to setup to installation to cleanup, Manuel and Edgardo worked in synchronicity demonstrating expertise and professionalism! The PWC inspection went very well with comments highlighting the expertise of the worked performed by Donmar. :-)
My wife and I are sincerely looking forward to working with Michael W. and Donmar for meeting all of our heating, cooling, and plumbing needs. :-) :-)“

“Leahy Plumbing experts Jim and Gary did a fantastic job repairing leaking pipes and in my home
I would recommend them to people who value their home and appreciate professionalism by the Leahy team.
Jim Jackson, proud customer
Dr J pleased homeowner“

“We replaced both 20 yo units in our home and coordinated it with a rooftop Deck replacement this week. The BGE guys Ray, Marcos, Christian and Nate did a terrific job over the 2 day install. I’m very pleased with the efficiency and quality of the work. The price also beat out 2 other bids!!“

“Was outa heat. Called him he was there 2 hours later. My heat was working 5 hrs later. Dont know how he did it. I was trying for a week. He was in and out. Nice guy. Definitely recommend“

“Mr. Keith came to my house last week to inspect and service my ac unit and he was very professional. He explained to me in detail on what I will need for my unit and what I will need to do to keep up with the basic maintenance. He was very pleasant to deal with and he didn't try to sell me things that I don't need for my unit His prices was also very reasonable. I will be referring Mr. Keith to my friends and family. I will also use him again.Service: HVAC system maintenance“

“Jimmy was great. Very impressed that the owner of the company came out to give me an estimate - after hours! His team was amazing. Showed up promptly and installed my new hot water heater within a few hours. They were so nice, very cordial and installed the unit - in a very difficult location - without any problems. Work was done, house left clean and everything put back in place. Great company. Will definitely use them again for any other projects that come up.“

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“BJ and his team were excellent. Went above and beyond, quick turnaround, and very professional. Will recommend Academy to friends and family!“

“It’s hard to find people who truly have hands-on experience with what they’re selling. I was lucky to meet Rick, who took the time to understand my situation, explained exactly what I needed to do to resolve it, and even had the parts in stock. Excellent service and knowledge.“

“The technicians were very thorough. I asked for vent cleaning and they opened every single vent and return. They were on time and very courteous“

“Exceptional Emergency HVAC Service – Highly Recommend!

I recently had an emergency situation when my air conditioning stopped working right at the beginning of a brutal summer heat wave. Thankfully, I called Foundation Heating and Air LLC, and they responded with incredible speed and professionalism. Within an hour of their arrival, my AC was back up and running — an absolute lifesaver in the sweltering heat!

From start to finish, my experience with Foundation Heating and Air was outstanding. Their team was punctual, courteous, and highly efficient. The technicians arrived well-prepared, quickly diagnosed the issue, and had the necessary tools and expertise to resolve the problem on the spot. It was clear they take pride in their work and genuinely care about their customers' comfort and safety.

What stood out most was their time efficiency and excellent customer service. In an industry where delays and vague timelines are common, it was refreshing to work with professionals who respected my time and communicated clearly.

I’m extremely satisfied with the service I received and would highly recommend Foundation Heating and Air LLC to anyone in need of air conditioning repair in Montgomery County, MD. They’ve earned my trust, and I wouldn’t hesitate to call on them again.“