Testimonials

"We have worked with Excel for 15yrs. Excellent service."
- Bob &Mike Westcon Builders, Elmhurst

"Tom's our guardian angel. We love him."
- Mr & Mrs Aboroa, Addison

"Always fast service."
- Art &Chris, Algonquin

"Tom talked me out of my old noisy Lennox unit. He put in a system made by Ruud. It's so quite I never know if its on."
- Ken K., Schaumburg