Customer Testimonials

Click Here to Read Our Reviews on Google.


Air Conditioner Maintenance in Columbia, MD 21044

“Best HVAC service I've ever had. Been with you for many years. Shane was the best of the best. Very thorough with his review of the AC. Took his time to do that. Taking time to do a very good job is most important to a customer. Hang onto that guy!” – Michael R.

Heat Pump Maintenance in Columbia, MD 21046

“Environmental Systems has proven their commitment to customer satisfaction. As soon as the management learned of my period of unsatisfactory dealings with them, they reached out immediately to rectify the situation. Their concern and commitment renewed my long-standing trust in their company. My 50 year sole reliance on them for all heating and air conditioning service has been validated by their superior handling of this problem. And I will continue to give them a 5 star rating.”

– Lucy H.

Heat Pump Repair in Columbia, MD 21046

“Fast, efficient, and personable. Follow up and notifications were great!”

– Phil S.

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.

D Nace
D Nace
12:04 05 Aug 22
Matt Bischoff
Matt Bischoff
02:05 03 Aug 22
Tim Facius
Tim Facius
18:45 23 Jul 22
I can't say enough about how pleased I am with Environmental Systems Assoc. (ESA) I was in the market for replacement of two full heating and A/C systems, and requested quotes from several contractors including ESA. I was initially attracted to them by their many years of "Best in Howard County" rating as well as the ESA website. By far, ESA was the most responsive and prompt in reviewing my systems and providing a quick quotation. The quotation was the most professional and complete, with a high level of transparency on what was being quoted and a competitive price. They patiently answered all my questions, they were willing to work with me on specific requests I had, were able to schedule the work in a reasonable timeframe, and were able to install both systems on the same day with minimal disruption.The installation crew was also excellent. They knew what they were doing, were professional and polite, they laid tarps down wherever they needed to be, and left the house and premises in a clean state. They also did a great job of educating me on the operation of the new system and thermostat programming, providing all the equipment manuals and warranty information, etc.It is very clear that ESA has a strong customer focus, an excellent product portfolio, excellent support information, excellent service and installation capability.
Shirley Ann Acquah-Asare
Shirley Ann Acquah-Asare
15:55 22 Jul 22
Team replaced my HVAC system. Very professional, quick and neat installation. Had a little issue with my second unit and they gladly took a look at it and resolved. Thank you team.
Christopher Parks
Christopher Parks
02:46 21 Jul 22
Knowledgeable sales team and knowledgeable installation crew. Willing to answer all of my questions and explain things every step of the way. 100 percent satisfied with the installation and with the condition in which my property was left.
Kevin Shields Sr
Kevin Shields Sr
02:43 21 Jul 22
Mehul Bhadiyadra
Mehul Bhadiyadra
15:09 18 Jul 22
Ludwin B.
Ludwin B.
19:03 08 Jul 22
Dennis and Cody did an excellent job with removing the old system and installing the new system. Very professional.
Joan LeRoy
Joan LeRoy
09:49 14 Jun 22
We had the entire HVAC system, including a new hot water heater installed recently. It was a big job and the crew who got the job done in a timely, professional and clean manner. I was instructed on how to use the new system. Thank you.
Bill Hawkins
Bill Hawkins
04:13 14 Jun 22
This ESA team removed our old heating and a/c system and installed a new one. They came on a Saturday morning and were done in two hours, working as a well trained team. They were efficient, courteous, and informative and left the work areas spotless. Thanks for leaving us prepared for a hot summer. Highly recommend Environmental Systems Associates.
S
S
01:51 09 Jun 22
There is a good reason why ESA is in demand. Letting just anyone mess with your HVAC can be a disaster, an expensive one- and an expensive lesson I learned.These guys are good at their work, and not out to rip you off. It can feel daunting as the most of us are not HVAC experts. I felt like I was getting professional advice with sensible and relatively affordable options.Highly reccomend, they have a lifetime customer now.
Kapil Bhanot
Kapil Bhanot
12:59 08 Jun 22
Mr. Hendricks was amazing - he was able to quickly get back to us after our AC died and found a heat pump system for us in stock at a reduced price. The installation team (Dennis, Seth, Skyler, and John) was friendly, professional, and did a great job. We have a 2 month old and our AC broke - we were afraid we were going to have to wait a long time to find an AC in stock. Thank you so much.
Erick Peters
Erick Peters
02:03 30 May 22
Beverly Belin
Beverly Belin
11:37 22 Mar 22
Excellent work
elaine stenzler
elaine stenzler
13:45 21 Mar 22
All three men and their helpers did an excellent job. Worked from the time they arrived until the job was finished. Coordinated the installation of the new heat pump on the roof with the installation of the new heating and A/C unit in our condo unit. Also they responded quickly to make an adjustment for a minor problem, which was then resolved.

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.