Continued educ​ation


​We are constantly learning the latest methods and technology in order to be able to install and service all our customers needs is the most efficient way available. We stay educated through factory training and certification courses in order to solve and diagnose any heating and cooling problems that may occur. We offer 24 hour emergency service. If you call us after hours, you speak with a live person - no machines. 

In fall of 1993 Assured Air, Ltd. was opened in downtown La Grange near the intersection of Hillgrove and Brainard. The original crew was Ted DeCarlo and Traci DeBartolo (who a year later married Ted in 1994). The shop was opened in La Grange which was the home of Ted's wife Traci, her family resided there for over 25 years. Ted a ND grad attended and graduated from Coyne American Institute for HVACR in 1987, then attended Triton College and came from a family of entrepreneurs. He worked for previous companies that focused on refrigeration, high velocity air conditioning systems, boilers, light commercial units and

Certified Contractor

"We Assure 
Your Comfort"

Achievements and Certification


  • ​Licensed, Bonded and Insured
  • Angie’s List Super Service Award Winner
  • Over 20 Years of Operation
  • Customer Care  Excellence Award Winner
  • Certified SpacePak and Unico installer
  • American Standard Distinguished Dealer Award Winner
  • N.A.T.E., EPA, R-410A, Variable Speed, AccuLink certified

regular residential HVAC systems. Traci a LTHS grad had office management experience, a accounting backround and also came from a family of entrepreneurs. Working together has a team the business developed and grew, concentrating on all forms of residential and lite commercial HVAC. It also specializes in Space Pak high velocity systems for radiator heated homes, boilers, mini split systems and in floor radiant heating. The company has moved a couple of times over the years spending time in Brookfield and Willow Springs where they are currently located. The company continues to provide quality service and installations to this day.


​Assured Air, LTD. is dedicated to providing our customers with high quality efficient equipment, a proper installation process at a fair reasonable price. Those three simple rules have been the key to our success and will continue to be the foundation of our growth. 

Honesty, Integrity, and
Quality Workmanship

We are customer oriented


Assured Air, LTD. is a customer focused company. We are proud Independent American Standard Customer Care™ dealers; with a customer satisfaction rating of 98% and a referral rating of 100%. How do we maintain such a high rating? It’s very simple! Whether it’s routine maintenance or a complete installation, we offer each of our customers a survey to be filled out. This allows the customers to be honest with us and gives us room to improve. The valued input from our customers has allowed us to improve over the years. We care for our customers and their property. We do every job with precision and cleanliness. We carry drop cloths, use shoe covers and clean up after every job, leaving the job in clean and safe conditions. We understand that we are just guests in your home. All work is preauthorized by customers.