“I have worked with CIS on many projects in many states. The team is always professional, courteous, motivated and the craftsmanship is top notch. They always complete the job on time and most times earlier than projected. I would highly recommend this company to everyone.”

Ron B - Benco Construction

“We are a national Developer of self-storage facilities throughout the country.  We look for contractors who add value to our projects as opposed to the contractors that simply quote the plans. On our last project we presented the mechanical plans to CIS.  The owner took a personal interest in the design plans and presented us with a redesign of the system that ended up saving the project over $40,000.  CIS was awarded the contract.  They completed the work professionally, on time and within their contractual budget.  I especially enjoyed working with CIS as they were very communicative and always did what they said they would do..”

Bravo Development

“Our air conditioner was not working and I called ABC.  They came out and told me that the condenser was bad.  They indicated that the unit needed to be replaced and was recommending we replace the heater as well.  I then called CIS for a 2nd opinion.  They came out and made a minor repair and the unit has been working fine ever since.  I know very little about HVAC systems - I need to call a service contractor that I trust and will make recommendations based on what is best for me.  The integrity of CIS is why they are the only HVAC contractor that I will use.  I highly recommend their service..”

Laura S. Vernon Hills, IL