Environmental Systems Services

Environmental Systems Services handles HVAC work for homes and businesses around Dallas, TX, though their main operations center on the Denton area and nearby towns like Argyle, Corinth, Ponder, Sanger, and Aubrey. Peter Work started the company in 1969, and it has built up a base of residential customers along with local businesses and churches that rely on steady heating and cooling service. The focus stays on repair, maintenance, and full system replacement for both air conditioning and furnace setups, with options for financing and free quotes on new equipment when needed.

Technicians respond to calls for air conditioning repair and furnace issues, often showing up the same day or within twenty four hours on repeat jobs as one customer noted after three years of use. They handle weekend emergencies too, such as a high water alarm that rang on a Saturday when the office was closed, with a quick callback leading to a phone diagnosis and simple routine changes to stop the problem. Maintenance visits cover standard checks on residential units, while commercial jobs keep systems in churches and offices running without long downtime, and replacement work includes full installs when older equipment fails.

Customers give mixed feedback on speed and communication, with some praising fast fixes on urgent breakdowns and others pointing out skipped inspections or rough phone handling that led to canceled service. Quality draws notice when problems get resolved right away without callbacks, yet price and overall reliability show up as weak spots in many of the eleven total reviews. DIRT Score 1.53 from 11 reviews on Finds.

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“The worst of the worst. Claim that they do an inspection but don’t - just take your money, and then fill out a form saying they inspected it. It’s called running a con. When the alarm goes off after the inspection, they come back out after said “inspection” and say the system needs to be cleaned - oh yeah, nothing weird about that - but why wasn’t that in the report when it just passed said inspection?. When I called back to ask why does it need to be cleaned out? - I got the wife - An indignant rude woman who can’t let another person speak. I could ask no question without her talking over me. And the question was, if it needs to be cleaned now, why didn’t it need to be cleaned 2 weeks ago when the inspection was done? One person has been here. I’m supposed to believe the tank filled up in that amount of time. I finally said - do you mind not interrupting me so that I can explain why none of this makes any sense…..She was still talking over me. She’s never been out here, has no idea what was done, was unbelievably unprofessional and defensive regarding what her husband supposedly did while under contract - which is NOTHING. These people are unaccountable, lazy, RUDE, and lack integrity. Update: i just pulled their file. We pay for four quarterly inspections per year. They did their 4th quarter inspection for 2024, on January 31, 2025. Total failure in customer service or just service PERIOD.”

“I called to inquire if they knew why we were getting a septic inspection from the county. The woman on the phone was aggressive and argumentative when I was only asking for information. She was raising her voice and that is when I told her to cancel our service. She told me ," No. Have your husband call my husband." I laughed at this point and told her to just cancel our service and hung up. I still don't know what triggered her. I would never ever recommend this service provider for Anything!”

“I’ve used them for three years. I’ve had two problems during that time and they fixed them within 24 hours. I like them and recommend them to my friends.”

“Environmental Systems is an outstanding company. I called them on a Saturday because our high water alarm was going off. They're closed. I left a msg & was pleasantly surprised that they called back within a few minutes. We figured out issue over phone, I've changed my laundry routines & no more issues.”

“They will only provide repair estimates or service if you have a long term service contract with them. I emailed to ask why this was the policy and got no response. I will be using a competitor. I guess they are busy and just have all the work they need.”