About Us

Peace of Mind in Heating & Cooling

OLSON COMFORT SERVICESstarstarstarstarstar4.7 / 5

5 stars
4 stars
3 stars
2 stars
1 stars

23 Total Reviews /files//olson-logo.png847-336-9200$1402 Dugdale Rd., WAUKEGAN IL

A family owned business, Olson Comfort Services takes pride in offering the highest quality heating and cooling services. We are licensed, bonded, and insured.

Our mission is complete customer satisfaction. We strive to get the job done right, on time, trouble-free, and guaranteed!! Click here to see a list of our awards.


Olson Comfort is the preferred heating & cooling contractor of Vista Health Care for all their employees and their families. Olson Comfort is also the heating & cooling contractor of choice by the Chicago Area FBI, Kenosha Area Coast Guard, and the North Chicago VA. We have been chosen by many area libraries, city halls, fire & police departments, and churches & schools for their HVAC needs because of our high integrity, trust, honesty, and quality of work. This also true of all of our loyal customers.

Our Team is N.A.T.E. Trained & Certified

NATE Trained & Certified

Olson Comfort Services is your local heating, cooling, air quality, duct cleaning, and blown-in insulation services! Call us today!


Olson Comfort Services officially came into being on July 28, 1977. Five owners of heating oil companies in the Waukegan area needed someone to service their customers heating equipment. Most heating companies had stopped working on oil systems due to the popularity of natural gas as a cleaner and more efficient fuel for heating systems. The oil embargo in the Middle East had forced the United States to look for alternate means of energy. The generation of electricity by nuclear power plants made electric heat very attractive. These two factors contributed to the formation of Olson Comfort Services, Inc.

Things went very well for the next two years. But, as time went on, some of the partners needed to go their own ways. The remaining owners realized they were better at operating an oil supply business than a heating company. The industry demand for high-efficiency equipment and the new technological advances needed to reach those levels helped them in their decision. So they began to look for a buyer for their business. It needed to be someone who knew the heating business inside and out. This person must also be versed in central air conditioning with the rising popularity of indoor air quality. And, it must be someone with high ethical business standards who could be trusted with their customer lists.

Meet Our Owners

Mark and Nadine our company owners.


General Manager specializing in Quick Books Accounting
Main scheduler of service and installation work
Very knowledgeable with all aspects of heating & cooling


Owner of Olson
Heating & Cooling Service Technician, Installer, and Estimator
Very knowledgeable with all aspects of heating, cooling, ventilation, and refrigeration


These qualities were found in John Thorn. John and one of the owners of Olson Comfort were long time friends from church. John had been doing heating and cooling work for twenty years. He had always dreamed of owning his own heating and cooling company. Along with his wife, Sharron, John bought Olson Comfort April 15, 1979, and developed the business into a full-service heating and cooling company specializing in residential new construction, replacement retrofit, and service of all types and fuels of heating and cooling systems. Light commercial and industrial work also became common as their expertise grew.


Being a family company, their children helped out during school breaks and on weekends. Mark, their oldest, continued to work during summer and winter breaks to pay for college. After graduating from college in 1983, Mark realized he wanted to stay in the family business. Over the years he advanced through all levels and departments of the business and continued his education in heating, ventilating, and air conditioning (HVAC). Mark and his wife Nadine bought Olson Comfort July 1, 2000, and have continued to grow their business into one of the top heating and cooling companies in the area.


  • The Rotary Club of Waukegan
  • Waukegan Citizens Police Academy Alumni
  • Zion School Board
  • Boy Scouts
  • Volunteers as teacher’s assistant at school tutoring in math and reading
  • Volunteers as Waukegan Garden Club Douglas Chapter, beautifying the parks of Waukegan.
  • YAHOO (Young Adults Helping Others) program in Zion performing outdoor maintenance for seniors and those in need
  • member of Zion Liquor Commission
  • Feed the Hungry – serves meals to over 100 people in Waukegan
  • Sunday School teachers for over 18 years