Thomas Sales has been a cornerstone of the Chicago construction market for over 35 years. We serve the wholesale electrical and mechanical industry, while still maintaining a presence in Co-op retail. Big or small, family owned or corporate, we have cultivated strong relationships with nearly every electrical and mechanical distributor in the Illinois/Indiana market. We specialize in engineered sales, and design many of the projects that we associate with. We provide heat loss analytics, layouts, documentation, engineering consultations, architectural design solutions, and contractor installation support to ensure each design becomes a reality.