Built on four generations of dedicated service, D.R. Kohlman is proud to provide heating, air conditioning and ventilation services to residential and commercial customers across eastern Wisconsin. We install, service and repair all types of heating, cooling, and indoor air quality systems, including:

  • Traditional forced air heat furnaces
  • Heat pump cooling and heating systems
  • Radiant floor heating systems
  • Boilers and hydronic heating systems
  • Ductless electric heating systems
  • Geothermal heating, cooling and hot water
  • Central air conditioning systems
  • Ductless single room and zoned cooling
  • Whole home air cleaners and purifier
  • Whole home humidifiers and dehumidifiers
  • Professional air duct cleaning and sanitizing


Considering a new heating or cooling  system? Our expert staff is trained to help you select the efficient, reliable system to meet all of your home comfort needs. We are also indoor air quality  experts, with solutions to help address the complex “sick house syndrome” and ease symptoms of allergies and asthma associated with indoor air pollution.

Emergency Repair Service is available 24 hours a day, 7 days a week. No matter what problem you are having with your home comfort system, we can help. Call D.R. Kohlman at 920-999-4631 any time of the day or night, and one of our friendly, highly trained service technicians will be there to get your system back up and running the way it should be.

Preventive maintenance is essential to extend the life of your HVAC systems and protect your investment. Join our Preferred Customer Club  and enjoy the security of our annual preventative maintenance program to keep your heating and/or cooling system in top condition, minimize your heating and cooling costs, help prevent costly breakdowns, and give you preferred service in the event of an emergency.


Contact us today  to schedule your appointment!

Best Seats in the House - 2016

Check out the “Best Seats in the House