Same Day Appointments Often Available in Collin County, TX
      "Timely and Professional"

      Owner, Chad Sheffield recommended the American Standard brand for the replacement of my 13-year-old A/C & Heat system. The crew was on time, professional, and had my home cooling in half a day. Best of all, I am saving 35% less on electricity!

      Mary R.
      Categories: hp 2
      "Very Professional"

      It’s summer time and we just moved into a house and the house started to get hot. We called C.A.S air and heating and Chad Sheffield came out not only the same day, but within a couple of hours. In minutes he had the problem diagnosed and had us back up and running. I cannot say enough about the professionalism of Chad. I would highly recommend!

      Mike A.
      Categories: internal
      "Prompt and Reasonable"
      Andrew Z.
      Categories: home
      "Prompt and Thorough"

      Our AC went out on a Monday and people we have a warranty through couldn't get anyone out here till the next week. After hours of trying to get a work order to get someone else here, C.A.S. was recommended. Cody came out the next day cleaned connections and it started working. Would definitely recommend them.

      Vicki M.
      "Fair and Communicative"

      I have nothing but good things to say about my experience with Chad and CAS Air Conditioning & Heating. Chad was able to come the same day on the weekend to help fix my air conditioning. He took time to explain the full system, what was going wrong, and what he recommended. He even gave me advice on how he would size the system in the future when it needed to be replaced.

      Lastly, the prices he charges are very fair. Of all the people I have hired over the years, CAS is one I would not hesitate to call again.

      Beth A.
      "Highly Recommend"

      I've used CAS twice. The first time our AC was frozen up and he had given me advice over the phone and told me what to do. He didn't expect anything in return. I called him anyway and asked him to do maintenance to clean up the AC units and get them maintained.

      I used them this morning after the AC stopped working last night. I texted them at 730 AM and they were out here at 9 AM. Finished by 915 with a reasonable cost and fully explained. Very professional, clean, timely. CAS comes highly recommended in our neighborhood, I can see why.

      Mansur M.
      "Great Experience"

      I have nothing but good things to say about my experience with Chad and CAS Air Conditioning & Heating. Chad was able to come same day on the weekend to help fix my air conditioning. He took time to explain the full system, what was going wrong, and what he recommended. He even gave me advice on how he would size the system in the future when it needed to be replaced.

      Lastly, the prices he charges are very fair. Of all the people I have hired over the years CAS is one I would not hesitate to call again.

      John G.
      "Friendly and Respectful"

      We were needing to replace a 15 year old a/c and furnace system before it completely broke down on us. Chad with CAS came by and gave us a quote. We got quotes from several companies, but got the best price and felt most comfortable with CAS. On the day of the replacement, the guys laid down drop cloths through the house to the attic ladder which is in a bad location in a hallway. Within 3 hours, the old system was removed and the new system was installed and tested. We couldn't be happier with the service CAS provided! Thank you guys!

      Kevin F.
      "Kind and Prompt"

      Chad was awesome. I really appreciate the service of a company that tells you the truth about what you need and does not needlessly try to up sell you. He came out, assessed what we needed, gave us a new filter and did not even charge us for his time! I am now a lifetime customer and advocate for CAS Air Conditioning!

      David K.
      "Go-To Company"

      I've been using 'Chad for many years and he's the only one I recommend for AC work. My two units served me well, 19 years for one, 20 years for #2 and I had Chad replace both. Solid guy that won't take advantage of any situation (like many of the AC contractors). Highly recommend him!

      Gary B.
      "Very Professional"

      Thank you, C. A.S. for your professional attitude and actions. I want anyone reading reviews of you to know that when faced with a glitch you responded quickly and took care of everything. This is the kind of service most hope for, and you delivered. Thank you!

      Ann C.
      "Highly Recommend"

      Josh came out and found a few issues with HVAC units, and expertly took care of them. Very trustworthy company, highly recommend them.

      Sal G
      "Strongly Recommend"

      Very fast, very professional, reasonably priced and following safety protocols including a mask to prevent COVID-19. Strongly recommended.

      Matt K.
      "Honest Service"

      We had our AC installed by CAS air in 2017 and have had intermittent issues with the cooling. Chad, the owner sent out his technicians multiple times(came out himself as well) but they couldn't pin point the issue. This spring, Chad went after the issue and came out when the issue occurred. He tried multiple solutions and finally got to the root cause and fixed it. When I asked him what I owed him, he said, nothing. This is after 3 hour long visits just this year. He got it fixed and did not charge for what he deserved. Dealing with Chad has always been easy, he is reasonable, doesn't just overcharge for his services and gets things done the right way (he inspects all of his technicians’ AC installs). I’ll go to them again when I need servicing or new ACs.

      Vineet C.
      "Service with Integrity"

      Highly recommend C.A.S. We were quoted for a new furnace, and I decided to get a second opinion with C.A.S. I was so glad I did! Chad, the owner said I did not need a furnace, but a switchboard replaced. He also saw it was covered under warranty, and he just charged me for just the labor and service fee! Thank you for being honest!

      A. V.