Heating and A/C Services in Mequon, WI

Ernster Heating & A/C offers an extensive list of services to both residential and commercial clients. Installation, repair, maintenance and more are all handled in a cost-efficient and professional manner. We utilize equipment from the top brands in the industry, guaranteeing a quality job each and every time. Please continue reading below for more information on our services offered, and as always, please call us today to get started!


Lennox Furnace

We have the ability to install, repair, and maintain any and all heating equipment models. Regular maintenance, which we can provide, helps keep your units operating properly and functioning for years to come.

Air Conditioning


When you’re in the middle of summer, there is nothing worse than a broken A/C unit. Let us install a new unit, repair your existing unit, or provide maintenance to ensure proper functionality to keep you cool throughout those warm summer months.

Air Purification


Air quality plays a large role in how we breathe and can even effect our overall health. Making sure that the quality of air in your home or workplace is free of pollen, mold, and other potentially harmful irritants can go a long way in establishing a healthy indoor environment.


Lennox Furnace

Our team has the expertise you need to work on complicated boiler systems. Boilers circulate warm water throughout your home or place of work utilizing either a baseboard unit, radiator, or tubing installed into the floor (referred to as radiant heating) – We can work on any boiler unit you may have.

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Ernster Heating & A/C | | 414 351-4303