Testimonials – Our Client’s Say It Best!


“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 end to end process that Mr. Chazoom and the ADI team take great pride in installing “the right”solution.  ADI was the only vendor who proactively informed us of the rebate program that we qualified for and then walked us through the paperwork.  ADI took the time to inform us of all of our service plan options and answered all of our questions.  I cannot recommend ADI enough. and I look forward to working with them in the year to come. ”    

Chris Reposa, Gaithersburg, MD

“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 competent and thorough throughout the work performed. They worked well with our general contractor; making themselves available when needed and also worked quickly in an effort to cause the least amount of inconvenience. We plan on using ADI for our annual service. It was a pleasure working with Mr. Chazoom and we would highly recommend his company.”

– Jeff and Rhonda Raden

“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 at no extra expense to the customer until everything is working properly. They make themselves available promptly. and provide nothing but the finest service. This company has my highest recommendation as a consumer.”

– Daniel B. Rubinstein, MD

“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 Sahady

“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 Lonergan, President


“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, Gaithersburg, MD


“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, Bethesda, MD


“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 Zettler, Cabin John, MD


“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, Olney, MD



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 21stcentury standards incorporating the highest energy efficiency and performance components for heating, cooling, humidification, dehumidification, and air filtration all at a superb value. The whole system is controlled and monitored for maximum comfort and efficiency by a high tech slim-line comfort module thermostat, which floats on the wall.

He even installed a European style super high efficiency ductless supplemental heat pump system to solve a unique heating and cooling weakness in my second floor master bedroom, which now for the first time since I have lived in this house keeps this room wonderfully comfortable with quiet efficiency.

ADI do their own sheet metal fabrication so on installation day they provided custom built components to transition from my new (smaller) system to the existing ductwork based on pre-installation measurements (it looks so nice).

Not only was I impressed by Mr. Chazoom’s craftsmanship, expert skills and his attention to detail and ability to adapt to unanticipated issues during the installation but he also exhibited a strong sense of honesty, trustworthiness, and integrity that instilled in me a confidence that this system would hold up and perform superbly for many years going forward.

Just to recap: After six weeks of detailed research and obtaining multiple bids from highly regarded competitors I could not be more pleased with the performance, efficiency, and value my new whole house HVAC system engineered and installed by ADI and am confident it will meet my needs for at least the next two decades.

                                                                                                                                                                                                                                                                    – Michael O’Halloran, Silver Spring, MD