Customer Testimonials

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Heat Pump Installation in Columbia, MD 21044

“I began using ESA in 2002 when I bought a home with an existing ESA maintenance service agreement. Every maintenance technician has been professional, courteous, and educational. In Dec 2020, I replaced my HVAC system. The experience has been outstanding. ESA helped me select the high-efficiency system that meets my needs, acquire excellent financing, and EA continues to patiently teach me how to get the best operation from my investment. The phone staff is knowledgeable and always courteous. I recommend ESA.” – Ayodele M.

Heat Pump Installation in Columbia, MD 21044

“Wonderful experience working with Environmental Systems Associates from start to finish. All of the installers were very professional, and did a great job removing my old system and installing the new one. I was very impressed with the quality of work and the efficiency at which they completed the job. I have now had nearly two weeks to evaluate the installation, during a period of extremely cold weather, and everything is working perfectly.”

– Michael G.

Gas Furnace Repair in Ellicott City, MD 21042

“We would like to recognize Nicholas for his outstanding efforts in troubleshooting our recent issue with our furnace thermostat. We called ESA because our thermostat screen would turn “blank” several times a day for several minutes. Initially he thought we would need a new thermostat unit, so a followup appointment was scheduled for the next day for installation. When he returned, he told us he had thought about this problem and wanted to check some other things in our system, thinking perhaps there was another problem causing the thermostat to shut off. After some more investigation, Nicholas found that the fan speed was set too low during the new installation last year, which was causing excessive heat and tripping the system to shut off. This solved our problem, and he saved us over $400. We would like to commend his diligence and motivation, since he was thinking about this during his off hours. It demonstrates that he is a very capable technician who should be encouraged towards more responsibility and higher level work. Thank you!”

– Audrey K.

Gas Furnace Installation in Ellicott City, MD 21042

“The team that installed our new furnace/AC did a great job. They were professional, wearing masks, and were efficient. At the end, the team leader explained every. I am very impressed with every aspect of the job.”

– Robert F.

Air Conditioner Replacement in Ellicott City, MD 21042

“ESA installed our air conditioner and gas heat units 22 years ago. When our AC unit stopped working, ESA came right out, assessed the situation, and explained our options. In the few days that we were without working AC, ESA lent us a portable room air conditioner unit, which cooled our main living area nicely. Our new AC is wonderful!! The ESA technicians are fantastic and take care of every detail. Upon completion, the system was explained to me in detail. I highly recommend ESA for all heating and cooling needs.”

– Jane J.

Air Conditioner Repair in Elkridge, MD 21075

“JJ came out today when the system said it was malfunctioning and to call ESA. JJ was here within the hour from when I placed the call. He was professional, friendly, efficient, and very knowledgeable. He answered all of my questions and ensured that I had an adequate understanding of everything going on. JJ truly embodies the characteristics of a phenomenal provider of service in this industry.”

– Cheri T.

Air Conditioner Maintenance in Ellicott City, MD 21042

“I have been using Environmental Systems Associates for over 10 years and it has always been with excellent results. Recently, I added a Gas Furnace to my house and went through ESA to handle all the aspects. Top notch professions that really know the systems. I also have relied on them for yearly maintenance and repairs. Always on time, always knowledgeable and professional. I believe they always go above and beyond by providing advice, tips on getting the best out of your HVAC systems. They are the absolute best!”

– Mary Ann E.

Gas Furnace Installation in Columbia, MD 21044

“Love our new gas heater and air conditioning system. The installation crew was professional, efficient, and went beyond requirements to complete an excellent job. We are extremely pleased.”

– Barbara D.

Maintenance in Columbia, MD 21046

“Great work, very knowledgeable. I would prefer Ivan on all my service calls and also prefer first AM appointment.”

– Robert T.

Gas Furnace Maintenance in Ellicott City, MD 21042

“They came on time, provide maintenance for the gas furnace and air conditioner. They did a great job.”

– John L.

Beth Fox
Beth Fox
09:36 14 Sep 21
Awesome overall experience across the board & in every respect. Thanks, Beth Fox, Columbia/E.C., MD
Amanda Johnson
Amanda Johnson
12:39 07 Sep 21
ESA is the best! Would never go anywhere else. We used them for an AC replacement and they were by far the most helpful out of everyone we called, and their prices were fair/in line with others. They also have a good maintenance plan. They do a great job!
Melissa Mehl
Melissa Mehl
14:39 21 Aug 21
John Taylor
John Taylor
01:55 18 Aug 21
Matthew and Ryan did a great job with the install, completing a complete removal of old HVAC system and install of new HVAC outdoor and indoor units.They finished the install in one day as promised, which was important to me due to a next day family event. They managed this even though the outdoor unit system delivered in the morning had been damaged in the warehouse - not visible till unboxed. They managed to locate a second system, and get it installed all in one day as promised. The salesman, Richard Dean also stopped by several times to make sure all was OK and was instrumental in getting the second system from the warehouse. They were all friendly, neat and knew exactly what they were doing.I highly recommend them and give them the highest rating.
Marcus O
Marcus O
18:35 15 Aug 21
My experience with your company was excellent! The salesperson Bob Galla explained everything that was needed in the process, he identified and advised all the repairs needed for vent and the ducts. Bob's proposal and the format I received was very formal; I really appreciated that a lot. He was responsive, knowledgeable and answered all of my questions in a very timely manner. The duct cleaners were very efficient and the installers were so nice
Michael McGovern
Michael McGovern
04:17 27 Jul 21
From start to finish everything was done well. We had to have an old AC replaced and the overall job looks great.
Mike Taylor
Mike Taylor
20:09 17 Jul 21
Jeffrey Prophet
Jeffrey Prophet
16:39 15 Jul 21
Neil P
Neil P
03:25 13 Jul 21
Jamie Delgado
Jamie Delgado
01:42 16 Jun 21
Paul Werner
Paul Werner
17:31 15 Jun 21
ESA was timely and responsive. I wouldn't call any one else.
Kristi Birch
Kristi Birch
14:25 25 May 21
Gino Molfino
Gino Molfino
12:11 15 May 21
My entire family has relied on Environmental Systems Associates for over 20 years. I consistently appreciate their responsiveness, providing honest advice and multiple options to remedy issues. The quality of the technicians and efficiency of the work they complete has always been top notch in all experiences.
Phillip Watters
Phillip Watters
00:47 14 May 21
Technicians were professional, clean, and informative.
Christopher Castellano
Christopher Castellano
10:21 07 May 21

Need HVAC Service?

Call the experts at Environmental Systems Associates.

Call us at 410-381-7991


Environmental Systems Associates proudly provides HVAC service to Howard County. Visit our service area page for more coverage details, call us at 410-381-7991, or request service online today.