4.7 
1.5k+ *The Angi rating for Heating And Air Conditioning Service companies in Frontenac, 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 Frontenac, 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 June 14, 2025
Serving Frontenac, 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 Frontenac, 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 Frontenac, MO and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1979
Free estimates
Emergency services offered
"They are always up front about my HVAC needs and explain things in detail before we agree for them to continue their work/recommendations."
+18
Serving Frontenac, 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 Frontenac, 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 Frontenac, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"A-ok! Dunn OneHour HVAC is always top notch!"
Serving Frontenac, 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 Frontenac, 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 Frontenac, 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 Frontenac, MO and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"I had a 15 year old system that was nearing the end of its life span. During the quote process, they gave me options based on what was hoping to spend. The quote they provided for a higher efficiency system made the decision pretty easy. The install team was extremely professional and I couldnâ t be happier with my new HVAC system."
From average costs to expert advice, get all the answers you need to get your job done.
When determining the AC coil cleaning cost in St Louis, MO, you’ll need to factor in the size, cleaning method, and type.
Heat pumps are highly efficient and can help reduce heating and cooling costs. Learn about heat pump costs in St. Louis, Missouri, to set your budget.
Heating and cooling system on the fritz? Discover the factors that go into HVAC repair costs in St. Louis, MO, and how you can save money on this crucial home update.
Have you ever wondered how AC works to make cold air that it pushes through your home? Follow this guide to learn air conditioning basics.
What is HVAC? Learn how your home’s heating, ventilation, and air conditioning system works to regulate your home’s temperature, humidity, and quality.
Retrofitting your house for AC is, surprisingly, not too hard. Here’s what you’ll need to consider to make it happen.
