4.7 
222 *The Angi rating for Heating And Air Conditioning Service companies in Barnhart, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Barnhart, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on November 03, 2025
Serving Barnhart, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"A-ok! Dunn OneHour HVAC is always top notch!"
Serving Barnhart, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Emergency services offered
Warranties offered
"Liberty did a fantastic job identifying and rectifying airflow problems with our existing Hvac system that was installed less than two years ago by another company. They were punctual, responsive and incredibly knowledgeable. I highly recommend them."
+10
Serving Barnhart, MO and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"MCS techs were very courteous. New HVAC system install went well. They explained all their work professionally. Also found a crack in the flue and replaced which was overlooked by a previous contractor. They are very thorough and reasonable. I highly recommend MCS."
Serving Barnhart, MO and surrounding areas
Approved
In business since 1954
Free estimates
Emergency services offered
"I’ve used this company twice. My husband has a medical condition that is affected by heat. The first time the air conditioner wasn’t working they made every effort to assess the problem immediately when I explained the medical condition. At the time they corrected the problem I was advised the system was probably 20 years old and we may have to consider a new system soon. The second time I contacted Comfortable Carla’s was about 4-6 weeks later when the system wasn’t working again. This lead to a system replacement. I was provided with different options, my questions were answered and the installation was completed as quickly as possible, especially in view of my husband’s medical issue. The staff was was professional, efficient and kept me apprised all throughout the process. I highly recommend this company."
+1
Serving Barnhart, MO and surrounding areas
Approved
In business since 2000
Emergency services offered
Credit card accepted
"Had new hvac, furnace, and hwh installed. Furnace had a couple of air leaks between a coil and furnace which I fixed myself. Hvac was spot on. Hwh failed first inspection, but was corrected in same day. For the premium price paid, these issues should not happen. Quality 4.5 because of these issues, same goes for value. Customer service is very good. They are very professional, work looks very good, clean worksite afterwards. I would recommend, but don't think about negotiating price with them. Their labor is very high."
+14
Serving Barnhart, MO and surrounding areas
Approved
In business since 1980
Free estimates
Emergency services offered
"The service tech was prompt, friendly, and helpful. They identified the issue with two fridges, and they recommended replacement or adjustment rather than costly unnecessary repairs."
Serving Barnhart, MO and surrounding areas
Approved
In business since 1982
Emergency services offered
Warranties offered
Founded in 1982. Team members that are drug tested and background checked insuring that the people in your home are safe. We specialize in repairing and replacing residential heating and air conditioning systems. "Fixed Right or It's Free"\nTechs available Sat & Sun call for appointment.
Serving Barnhart, MO and surrounding areas
Approved
In business since 2018
Free estimates
Credit card accepted
"Adam did the work in my home today. There were three heating and air-conditioning units which were checked out and some which needed some repair. I highly recommend him. Reasonable cost excellent knowledge and willing to take the time to do an excellent job."
Serving Barnhart, MO and surrounding areas
Approved
In business since 2025
Emergency services offered
Credit card accepted
"Had a few issues with my HVAC. Austin was fantastic and fixed everything the same time. Was late"
Serving Barnhart, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"Wonderful experience with Gas Guru!s! My husband and I would highly recommend them! The owner was very nice, polite and did a great job on our gas fireplace."
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