Heating & Cooling


We provide the perfect environment to protect your home or business, your furnishings,

artwork and most importantly provide a comfortable living space for you, your loved ones

and employees, no matter what the season.

We have a wide variety of high efficiency products to fit every need from elegant fireplaces to humidifiers, air purifiers, cooling and heating. 

We service all the major brands of equipment and are experienced in residential and commercial installations of all sizes.  Call us today for a no-obligation consultation on updating your existing system or planning for your new building.



111 South Main Street

Oconomowoc, WI  53066


Serving the Lake Country Area for over 50 Years

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download a printed version of our services.

“AASEN is how you spell perfection in heating & cooling.” 

John Barker - Lake Country Area

“Excellent workmanship, clean and professional.”

Sue Phillips - Hartland

Thanks to the Aasen team!  I am very pleased that you could get over to our house the same day.  We will call you for our needs in the future.  Thanks again!”

Kris and Dave Huebner

Thank you again!!  Two of the best were sent to install our new furnace, Jim & Adam.  So friendly, neat and courteous.  And to Bob a great job on the estimate and answering our questions.  Not once have we been disappointed with your response or your service people.  Again thank you Pete and to all the good crew!”

Al & Jane Herinh


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