Customer Testimonials

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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.

Gas Furnace Repair in Columbia, MD 21044

“I have been a customer of Environmental Systems since 1976. I would like to recognize Maureen(office contact) and Scott (our tech) for an outstanding job recently done for us – last week before the snow began we had no heat-Scott had someone troubleshoot our Carrier model and came to our home twice to make sure the proper repair was done before the storm. As a seasoned (older) realtor I have provided Environmental's name to many clients thru the years they provide outstanding service in a very professional manner.”

– Elaine K.

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
Larry B
Larry B
03:14 14 Apr 21
peter michos
peter michos
12:19 23 Mar 21
John Hartge
John Hartge
15:18 19 Mar 21
ESA installed 2 heat pump systems with extensive ductwork (21 supply and return vents) and 1 ductless system with two mini-splits in our 165 year-old family farm house. Their large installation crew completed the work in 4+ days. Previously, two other local, well-known HVAC companies had come to our house to give us a proposal. The first said that this would be the most challenging system they’d ever designed; after 4 weeks, they were still working on the proposal. At that point, I called the next company and when they walked through our house, they told us upfront that the job was too big for them. Fortunately, they recommended ESA. As Bob Galla (ESA) walked through our house, he clearly understood the challenges with designing and installing ductwork and HVAC into this old house. He drew on his knowledge as an energy auditor, expertise on the Carrier and Aprilaire systems, and many years experience in designing systems for old farm houses. ESA sent me a proposal within just a few days and the price was right on target with my budget. Ryan was the overall supervisor. He and Rick led the work that was done throughout the house. They and everyone on the crew were great to work with. All of the work was carefully done and thorough, even at the smallest details. Ryan and Rick welcomed my involvement and were very responsive to my many questions. We had scheduled the install so my wife and I had two weeks to prepare the basement and attic for the work to be done. It was a lot of heavy and dusty work to clear the space for the systems and ductwork, but absolutely necessary to be done before the installation began. At the end of each work day, the ESA crew of up to a dozen workers cleaned and straightened up the job site. Bob and the crews went above and beyond to fit the HVAC systems and ducts so they took up minimal space in our attic and basement. After the install was completed, the new systems were practically invisible within our living areas - the only evidence of the new HVAC were the vents and two thermostats to control the downstairs zone and the upstairs zone. The work was completed about 3 weeks ago and everything is working beautifully. ESA has followed up several times to check on the systems and our satisfaction. The bottom line is that ESA did fantastic work! In retrospect, I don’t think there anything special about how they designed and installed the systems in our house - it is simply the way that the company conducts their business. I don’t give praise lightly, ESA earned their five stars from me in every category.
Vickie Henderson-Zegar
Vickie Henderson-Zegar
15:28 13 Mar 21
Richard Dean took great care to evaluate my heating and cooling system in the summer of 2020, gave me an outline of the various options to replace my heating & cooling system, did not pressure me to make an immediate decision, and this week - seven months later, his team of professional installers spent the day installing my new equipment. The installers were on time, professional, knowledgeable, and respectful of protecting my flooring. I've signed up for continuing coverage on both my existing and newly installed heating and cooling zones. It's nice to know I'm working with a reliable company. Thank you ESA!
Chris Zang
Chris Zang
02:53 13 Mar 21
Bennett Edelman
Bennett Edelman
00:51 19 Feb 21
Staff were knowledgeable. Installation team was efficient, courteous, and communicative.
Pamela Dean
Pamela Dean
14:36 11 Feb 21
Great company..upfront and professional...very conscientious!
Victor Mena (Vick)
Victor Mena (Vick)
23:08 04 Feb 21
The entire team from ESA deserves a shout out. Everyone was highly professional, courteous and sensitive to my needs. The team went above and beyond to ensure I was satisfied with the installation.
Natalie Miller
Natalie Miller
12:26 04 Feb 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.