Green Alternatives, Inc. is a group of certified solar installers who provide building services for commercial and residential purposes.
Zehnder America Inc. provides high quality heating and ventilation solutions to promote comfortable, healthy, and energy-efficient indoor living.
The Power Bureau is a consulting firm that advises energy buyers and marketers on wholesale and retail energy procurement and transactions in Illinois as well as the remainder of MISO and PJM.
Whole Sun Designs Inc. specializes in the design & installation of residential solar energy systems. We work with everyone, from home owners looking for a turnkey system, to do-it-yourself-ers looking for equipment and guidance. Though residential, grid-tied solar electric systems are our specialty, we also have experience in solar thermal systems, off-grid solar electric systems, and commercial-scale solar electric systems.