Best Heating & Air Conditioning / HVAC In Granite City

“Koesterer answered the phone when we called (something you don't get from a lot of businesses these days) and they responded quickly to our needs. The job was done quickly and no mess left behind. You can't ask for more than that from a service company. I would certainly recommend Koesteter Heating and Cooling.“

“I really love this company they do good and reliable work, one flaw when you call them to take care of a problem the technician starts working on the problem, before talking to you about the problem and how much it will cost, so make sure you tell the technician to give you a quote before starting work, If it wasn't for this Act I would have given this company a 5 Star Rating.⭐⭐⭐⭐⭐“

“I'm very pleased with the service call by Barnhart. They were prompt, professional and took care of my issue for a reasonable price. I would definitely recommend Barnhart HVAC.“

“Great service, great product, 18 years after installation unit is still running great.“

“Mr Dixon and his crew did everything they could to get my old unit running.it wasn't to be. He gave me a quote for a new unit which was very reasonable and had it installed in a very reasonable amount of time . Very professional and great crew. Thank you again, the system is working great“

““