Bosch Enclosures EHA recently installed two Bosch enclosures to protect outdoor power units EHA recently installed two Bosch enclosures to protect thehydraulic power units from the elements. The enclosures were designed and built at our Cedar Rapids location and shipped complete to the customer. EHA service technicians went on site to install and anchor the enclosures. Custom holes and notches had to be cut on site to clear the hydraulic and electrical lines. The roof of each enclosure is a custom made stainless steel pan. Access doors were designed into the enclosures for maintenance.