Skip navigation

No Overtime Charges

Emergency Service


No Overtime Charges

Serving the Denton, Texas area



Everything flowed perfectly since the initial contact. Even when I called was a Sunday Mr. Miller showed up and give an estimate for the job and promised to came back on Monday and he did. For there on all group performed very efficiently until they finished the job. EXCELLENT JOB!!!

- Luis G.

PRK was called in for a second opinion. Another highly advertised company came to do their yearly service and they told me the capacitor on the fan motor was not putting out correctly and I had a small leak in the condenser in the house. Although the system was 3 years and still in warranty it was going to cost about $2500 in labor costs. When PRK came out they said that the capacitor was putting out correctly and they system was about a pound low on freon and the inside unit was still factory sealed and had not been properly checked for leaks. After inspection of the outside unit there was oil on the ground leading them to believe freon was released to cause the system to be low. PRK correctly charged the system and has been working perfectly ever since. They will always have my business. Thanks Keith and his crew.

- Ed M.

Great service and the technician was very thorough but didn’t waste time. He explained all of my options and made recommendations without pressure. I am extremely happy about the service and my air conditioner was up and running very quickly!

- Lucinda S.

Punctual, very professional, courteous technicians. HVAC service at a reasonable cost. I shopped around and compared costs, equipment quality, etc. before deciding to use this service. I would definitely use their service again.

- Samuel M.

Outstanding HVAC company in every regard! Restored an intermittently operating gas furnace to reliable operation. Same day that I called! Minimal expense! Also, approx 5 months ago, did a beautiful installation of a split-condenser a/c and heating system in my garage “man-cave” which provides flawless air conditioning and heating! Quiet and efficient! Highly recommend PRK Services!

- Jeff G.

We had an AC unit not working in part of our business. The digital thermostat just went out. The technician answered the phone gave me some pointers. After some initial troubleshooting nothing was working. He came out in a very timely manner to help fix the unit. In less than 30 minutes we were back in business. The technician was very professional, responsive and was highly communicative during his visit explaining what he was doing and why. This to me is very important part of the customer experience. I will definitely trust PRK and their team of technicians with our residential and business needs.

- Brian B.

The servicemen were very polite and informative. They even thanked us for calling them for the repair. Very pleased.

- Lana S.

We have been using Air One for several years now. Their dedication to quality service is above and beyond what you expect. The staff is knowledgeable and the prices are unbeatable. I would strongly recommend them!

- Rachel

We have been a client of Air One Environmental Services for over 5 years. Air One provides professional quality service for all of our HVAC maintenance and repair needs. The Air One technicians have the experience and knowledge to do the job right the first time. From emergencies to scheduled service appointments, Air One is always prompt and able to accommodate our schedule. If you are looking for a reliable, experienced, HVAC service provider for both commercial and residential, we recommend Air One Environmental Services. You will receive first class customer service, a quality job, at reasonable value.

- Trevor Bray

We were new to Denton, and the furnace in the house we had recently bought died two days before Christmas 2010. I called Keith Shugart at AirOne, not expecting service until sometime after the holiday. But Keith and his service crew were at our house that afternoon and worked well into the evening to install new furnace and air conditioning units. We had heat again that night and have been quite satisfied with our new equipment and the service we have received. Keith is an honest businessman and the Shugart’s are a terrific family and excellent neighbors.

- Don Lindsay

I taught Keith Shugart in high school science. We have used his services for the past three years. The technicians have been knowledgeable and have properly diagnosed our problems professionally. They fixed it right the first time and let us go on our way enjoying our cold air. Call my alumni at Air One. You will be pleased with their service just as we have been.

- Donn E. Arnold

I own and operate a number of rental properties in Denton. I have used Keith Shugart’s Air One for my heating and air conditioning needs exclusively since about 1993. Whether it’s a normal “8 to 5, weekday” service call, an emergency after hours call or on the week-end, I know that I can trust the people at Air One to be there when I need them.
In nearly 20 years of doing business with Air One, they have never let me down. Over the years mistakes have been made, but what matters to me, is that I always know that I can trust Keith to “make it right” when mistakes are made. As I have said on many occasions, “If you’re looking for a ‘big shot’ to try to impress you and dazzle you with a fancy story, go somewhere else. But if you’re looking for honesty, pride in workmanship, fair pricing and a long term business relationship, call Keith Shugart at Air One. He’s the man!!!

Best Regards,

- Niles L. Harper

We are great fans of Air One. I use them for my personal home as well as our friends, clients and family. One thing that really impresses me is the honesty that they have shown to us, I have found that the advice they have given has both been true and has saved us hundreds of dollars in future costs. Keith Shugart and Air One is number one on our list to get the job done and to get it done right the very first time. Dependability and being able to do the job right in a timely manner is very important in our business, Air One has been able to provide that for us every time.

- Ryan Owen

In addition to general Real Estate services we manage a large number of residential and commercial properties in Denton and the surrounding area. Our HVAC needs are varied with some old and some new equipment including the continuing need for new installs. From central heating and cooling (conventional and heat pump) to circulation systems, Air One has always provided excellent and efficient service in every type of heating and cooling environment we must maintain.
I have remained happy with Air One from a quality standpoint and appreciate the timeliness of their response when problems exist with our equipment I believe you will also learn to appreciate them given the opportunity. I recommend them with confidence.

- Dalton Allen

We depend on PRK Services for more than one location. As a land lord and property agent, I know I can call PRK Services 24/7 and somebody is taking action.
I have used PRK Services ever since Keith started this business.I have never had a reason to consider another company. I have learned to expect Quality Value and Services.
Thank you Keith & Crew.

- BJ E.

The Crawfords are very excited with the repairs you made to their heat pump system. The new thermostat is working great and the air flow through their home is now evenly distributed.
Many Thanks!

- Annette E.

Gave up on home warranty company and had PRK come service unit. Great technicians who work to resolve issue and give the customer utmost attention.

- Adolph G.

The MOST professional and AMAZING Heating/Air Conditioning company I have EVER used! I recommend them to everyone I know looking for any kind of Heating/Air Service! The staff and especially the on site tech were very professional and took care of the problem quickly even after hours! I have used them many times and will always use them for future needs!!!!

- Misty L.

PRK is efficient and economical. They only fix what needs to be repaired and can be trusted not to up-charge.

- Mark W.

Came at the drop of a hat. Got us out of a real jam. They checked back to make sure everything was cool. Great service.

- Joe P.

If you need a really good, dependable, trustworthy A/C company, give Keith a call at PRK Services. They were not only fast, but also very reasonable! Thank you Keith!!

- Amber M. W.

Keith was awesome!! He came out within HOURS of my call when our AC went out. The service techs that came out to replace our coil were fast and informative!! I will always use PRK if I need AC service.

- Rene M.

Hey, just wanted to tell you all that you are all great!! Called late this afternoon because my Air Conditioner stopped working. Very impressed that you first told me to try other things before sending someone out. The tech (looks like Ben) arrived on time, (I was a little late) but he was very nice. From talking on the phone with you to Ben, you have all been awesome and it did not cost me an arm and leg, and apparently there is not something else I need to fix...amazed!! I will use you again in the future (hopefully not to soon) but will recommend you to everyone!! Kudos guys and gals!!

- Satisfied Customer


Which includes our "Exclusive Precision Tune-Up"