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(301) 774-4200

About Us

About Us

When it comes to keeping your heating and air conditioning systems running smoothly and efficiently year-round in theOlney, Gaithersburg, Silver Spring and greater Montgomery County, Maryland area, you can always trust the experienced hand of ADI Heating and Air-Conditioning. Based in Montgomery County, Maryland, we have over 30 years of experience in serving the greater Washington DC area and specialize in all aspects of indoor air quality and comfort, both residential and commercial

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Our Services

Furnace Services In Gaithersburg, MD

Furnaces

We are serious about providing your family or light commercial property the best in the heating industry. Your customer experience and comfort is our top priority!

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Air Conditioning In Gaithersburg, MD

Air Conditioning

We are serious about providing your family or light commercial property the best in the air conditioning industry. Your customer experience and comfort is our top priority!

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Commercial Refrigeration in Gaithersburg, MD

Commercial Refrigeration

Regardless of how major or minor your refrigeration issue is, we recommend that you have professional maintenance and repair to your systems. This will prevent damage and ultimately save you time and money.

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Indoor Air Quality In Gaithersburg, MD

Indoor Air Quality

Your home indoor air quality matters for the safety of your home, your family’s quality of health and energy costs savings. Learn more on the importance of the right affordable systems available. Get your home tested and begin breathing easier today!

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Testimonials

I love the professional and courteous service of the guys at ADI!

Lilach A.

Professional, dependable and first-class sales and service!

John P.C.

Ronen is reliable, honest and professional. He is always available to answer questions or come by to check on things. We have always been super happy with his service!!

Ruth G.

I have been using ADI for many years first for repairs and then later for a whole new system. ADI is dependable and responsive and their prices are reasonable. Their workmanship is quality and they will advise the most cost effective approach using industry best equipment. I highly recommend ADI for heating and air conditioning needs.

Michael L.

I am especially pleased with my newly installed HVAC system designed and installed by Mr. Ronen Chazoom and his assistant Jose of ADI Heating & AC, LLC. Mr. Chazoom engineered a customized and right-sized complete whole house HVAC system to bring my 72 year-old cape cod style house in Silver Spring Maryland up to 21st century standards incorporating the highest energy efficiency and performance components for heating, cooling, humidification, dehumidification, and air filtration all at a superb value. The whole…

Michael O’Halloran

We’ve had the pleasure of using ADI Heating and Air-Conditioning’s services in our home since first moving to Olney over 10 years ago. First to replace the old air-conditioning unit that came with the home, and then for annual maintenance checks ever since. We are always impressed with how thorough they are in their work, and how tidy they are in our home. We highly recommend ADI to all of our neighbors.

The Dailey Family

Could not have been more impressed with ADI Heating and Air. Was looking to convert from oil to gas after many years of debate and ADI facilitated the process from start-to-finish. They treated my home with respect, offered the most competitive pricing for the work, and carefully explained the job in full detail right from the start.

Andrew Z.

We had an opportunity to use ADI this past summer for the very first time when our air-conditioning unit failed. We could not have been more pleased. They showed up on time, their truck was fully-equipped, and they had us up and running that same day.

The Demore Family

We first started using ADI over 13 years ago and could not be happier. From minor repairs, to the installation of our new furnace las year, ther is no one we’ve come to trust more!

The Abrams Family

Lonergan Homes, Inc. has utilized ADl Heating & Air Conditioning, LLC since January of 1999 for the installation of our heating and cooling systems. They have consistently performed extremely well, including meeting our construction schedules, and responding promptly to any service calls that have arisen. We are very pleased with their performance and 1 recommend them highly.

Ed L.

Mr. Chazoom and his company ADI Heating and Air, provided and installed six heat pump units, three propane furnaces and all the duct work for my home located in Laytonsville, Maryland. (My home is over 9,000 sq feet.) The quality of work was incredible. My architect did not provide a rough-in sketch for the duct work, therefore Mr. Chazoom provided me with his design of the system, which I accepted. The work was completed quickly and flawless per his proposal.

Earnest S.

As a recent customer of ADI Heating and Air Conditioning, I would like to point to the outstanding service I received. This was not just in the initial installation of the heating and air conditioning system, which itself was professionally carried out, but in the full follow-up service provided. ADI in my experience assures that any equipment or system they install performs as expected and will undertake any adjustments or repairs necessary to make sure that the is the case…

Daniel B.

At the recommendation of several people, we had ADI Heating & Air Conditioning replace the entire HVAC system in our home in the summer of 2007. This is a two zone system and the work also required the relocation of some ductwork. We were well educated by Mr. Chazoom, the owner of ADI, on the various manufacturer’s and their systems and guided in a direction that has turned out to be an excellent choice for our needs. ADI was very…

Jeff and Rhonda R.

As a home owner who has dealt with every home repair and replacement there is I can honestly say that my experience with ADI Heating and Air Conditioning was the best customer experience I have ever had. The ADI team spent a great deal of time analyzing and measuring our existing system as well as designing the new system. I vetted 3 quotes and ADI pricing was the most competitive. As all homeowners know It was obvious through out the…

Chris R.

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