4.7 
910 *The Angi rating for Heating And Air Conditioning Service companies in Olivette, 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 Olivette, 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 October 23, 2025
Serving Olivette, MO and surrounding areas
Approved
In business since 1947
Free estimates
Emergency services offered
"The technicians are so nice and helpful, professional, and punctual. They've maintained my hvac for the three years I've lived in this house and all runs smoothly."
+106
Serving Olivette, MO and surrounding areas
Approved
In business since 1947
Free estimates
Emergency services offered
"The person who handled my call was friendly and professional. She told me a technician would be at my house in 4 hours and called me when he was on his way. The technician was outstanding, on time, professional, friendly, and quickly diagnosed and fixed the problem...best of all, he didn't try to sell parts/service that I didn't need! Best experience with an HVAC company I've ever had."
+2
Serving Olivette, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"A-ok! Dunn OneHour HVAC is always top notch!"
Serving Olivette, MO and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"Great. Brandon knew his stuff. He conducted and airflow test to show us where our leaks were. He provided suggestions on where we could best reduce leaks. He also looked over our structure (joists) and HVAC system, again, suggesting improvements. Well worth the investment!"
+18
Serving Olivette, MO and surrounding areas
Approved
In business since 1993
Free estimates
Emergency services offered
"Extremely fast replacement heating and cooling installation. Exceptionally nice people. Zero problems after the installation of 2 Furnaces and 2 Air Conditioners in our zoned HVAC home."
Serving Olivette, MO and surrounding areas
Approved
In business since 2009
Warranties offered
Credit card accepted
"They were professional from the phone call to the installation. He had everything he needed to replace the hot water heater and proceeded. I would definitely recommend Hosack Plumbing."
+2
Serving Olivette, MO and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"I had them do a full HVAC replacement and it was done in about 6 hours. Great work and professional, always answers calls for any questions. I would definitely recommend."
Serving Olivette, MO and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"Seems I was spending a ridiculous amount of money on electricity because my central unit was not operating correctly. I now have flowing cold air."
Serving Olivette, 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 Olivette, MO and surrounding areas
Approved
In business since 2010
Credit card accepted
Customers say: Quick response
"Very professional and great service. Would contact again for our HVAC needs."
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