Thanks for stopping by our new site. Hopefully, you will find everything you're searching for. If you have any questions or suggestions, feel free to e-mail me through the contact page. We'll be changing up our special offers from time to time, so feel free to stop back.


Contact Details

  Website
  City Columbia, IL
  Zip Code 62236
  Address 9900 Gravois Rd
  Phone Number (618) 281-2665

From Our Website

You'll find everything you need right here on our site. Our team is dedicated to all things HVAC, working with the top manufacturers the business has to offer. Our commitment to your family and business' comfort and safety is the reason that we've been in the business for over 65 years, and we don't plan on stopping any time soon. If you have questions or suggestions about how we can make your experience with us even better, please don't hesitate to reach out to us on the contact page. Please check back often, as we update our specials and promotions on a regular basis.


Commercial heating systems play a huge role in keeping your business functional year-round. These systems should be both energy efficient and effective in providing heat to your commercial property. Heating systems technology for industrial and commercial building needs has changed dramatically over the years. Trust that our team at Harster is on top of the trends and technology to help you and your company with your heating needs. Your commercial HVAC system in Fenton and South County areas is just as important to us as it is to you.


Pardon the pun, but air conditioning for our team at Harster HVAC is a breeze. As one of St. Louis' most respected residential and commercial HVAC companies, we have worked on thousands of homes in and around the area. From unexpected air conditioning repair in Columbia to a standard installation of a new AC unit, our team does it all. Having a team of skilled technicians that are ready if you need air conditioning repair in Columbia can give you peace of mind that high-quality help is only a phone call away.


To learn more about commercial rooftop units and how they can benefit your business, call us today at 314-668-2273 or email us here. We will reply within 24 hours, Monday-Friday.


Having an efficient hot water heater is a must. Let's face it: cold gets old. Harster's here to help with several hot water solutions that we can estimate and price for you quickly. We offer top manufacturers of tank and tankless water heaters, as well as electric choices. Harster can install and maintain your hot water heater, or repair or replace your old one. We'd be happy to do an evaluation of your system today! Harster Heating and Air Conditioning is a top-rated residential and commercial company whose been family-owned and operated for over 60 years.


Business owners are under a lot of stress and pressure to keep their operation running smoothly at all times. With the seasons so extreme in the Midwest, staying on top of your commercial HVAC needs can be an additional worry that you have to deal with, as you always want your employees and your customers to feel comfortable while in the building. Thankfully, our HVAC contractors serving Columbia and surrounding areas can help take care of all your HVAC needs at an affordable price. Because commercial HVAC equipment can be so complicated, even one small mishap can result in disaster.


From sweat one day, to shivers the next, Harster knows just how tough your HVAC has to be to tackle this town's brutal, ever-changing conditions. We have the systems and services you need to keep up with the climate. We offer a wide range of quality HVAC systems from the top manufacturers and companies. We work with outstanding contractors and our service team is one of the best you'll ever work with for installation of a new system or maintaining your current system. Harster Heating and Air Conditioning is a top-rated residential and commercial company whose been family-owned and operated for over 60 years.


We carry top manufacturers and handle installation and repair with heat pumps, rooftop units, water heaters, thermostats, registers, boilers, humidifiers, heat exchangers, inspections, sheet metal work (whew) and much, much more. The full list is below. If you're a DIY-er, we can help you with media filters, too.