Residential & Commercial Heating and Air Conditioning

"Your Family's Comfort, Health and Safety is Our Focus and Concern."

Cahill Heating and Air Conditioning specializes in residential and commercial service, repair and installation of air conditioning and heating systems throughout the Lake County area.

As a family owned and operated business, we take great pride in the fact that we bring a lifetime of experience in the perfection of our craft. As your HVAC provider, we are dedicated to providing you with the most energy efficient heating and air conditioning systems available. It is our commitment to excellence, however, that sets us apart from the competition.

Whether you need to repair, service or replace your furnace or air conditioning system, Cahill Heating and Air Conditioning will be there when you need us, charge you a fair and honest price and stand behind our work

If you need air conditioning repair or installation, you can rely on our unbeatable service before and after the sale. Our award winning customer service has earned the Cahill Team the “Trane Distinguished Dealer Award” for the last seven years.

Serving Lake Bluff, Libertyville, Lake Forest, Mundelein and Gray’s Lake in particular but all of Lake County in general, Cahill Heating and Air Conditioning is your trusted choice for heating, cooling, furnace and air conditioning repair, service or replacement.

At Cahill Heating and Air Conditioning, we deliver “Peace of Mind’ by virtue of everything that we do to make the environment of your home as comfortable as it can possibly be for you and your family

If you have any questions, feel free to give us a call. A Cahill Comfort Specialist will be happy to help you improve the comfort level of your home environment.

Free Estimates for  Equipment Replacement

Telephone Quotes

Maintenance Services

Factory Trained Technicians

Licensed and Insured

Flat Rate Pricing

Special Financing

Known for their air conditioning, furnace repair and maintenance expertise, our technicians use their knowledge to successfully repair or replace your heating or air conditioning system.

Licensed, bonded and insured, they are factory trained and can always be counted on to arrive promptly and perform at the highest level of craftsmanship. They are committed to excellence and understand the trust that you have placed in them to communicate clearly what needs to be done to ensure your families comfort, health and safety.

Ken Kniewerth

Ken Niewerth has been designated by Trane as a Total Comfort Specialist. This prestigious award recognizes Cahill Heating and Air Conditioning for the quality of their workmanship in the repair of your furnace, air conditioning system or the installation of new heating and air conditioning equipment.

This designation is only given to those Dealers who excel in customer service before and after the sale. As a representative of Cahill Heating and Air Conditioning, you can be sure to place your trust in Ken when you need replacement of your air conditioning or heating system.