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About ESI

Energy Solutions of Illinois Inc. (ESI) was founded in 1987 as an energy management company. After years of installing temperature controls made by other companies we decided to design our own.

We started ESI Controls in 1994 with the original planning for the AD 2000 Temperature Control. We wanted to create something more advanced and easier to use than the products available from other companies at the time. Together with the fine engineering staff at Circom Inc. it became reality.

Now in its 28th year of production, after many improvements and hundreds of successful installations we dedicate this Web space to all that is...  AD 2000.

Enjoy your stay at ESI Controls.

Copyright (C) 1994-2023 ESI Inc.