ECH was a diversified energy services company. Among it's operations it managed a services division which performed energy au ... dits, lighting retrofits and hosted a national service center for energy and lighting maintenance services. It's Energy Consulting Division provided training and marketing services for the US Department of Energy, the US Environmental Protection Agency and developed Demand Side Management programs for Investor Owned Utilities. It's Technology Division developed products in energy efficient lighting, building automation, voltage regulation and an Ozone gas generator for commercial laundry applications. ECH was sold in 2004. read more