Small Business, Big Impact

At Nicolet Heating and Cooling, we view ourselves as the Green Bay area’s most diversified and greenest HVAC installer. We specialize in the installation, maintenance, and repair of all brands of heating and cooling equipment in residential and commercial environments. Not only can we show you how a new furnace and air conditioning system can save you money and keep your home more comfortable, but we can keep it running reliably and efficiently for years to come.

Working in the industry since he was 18, owner/operator Leif Thompson knows the “science” of buildings. He ties together heating, cooling, and ventilation techniques to air seal a home or business, creating an environment that is comfortable and energy efficient, saving you money.

We stand behind our motto, “Go Green Save Green,” and we specialize in clean energy solutions by installing Bosch and Carrier geothermal equipment.




Trusted Brands

Look to Nicolet Heating and Cooling for top-of-the-line energy appliances, including:



Luxaire and Heil furnaces  –  Bosch and Carrier geothermal equipment  –  NTI and IBC condensing boilers  –  Royall forced air wood furnaces  –  Honeywell WiFi thermostats  –  Aprilaire humidifiers  –  Trion whole-home media air cleaners – Modine heat and ventilation systems