EPE is the prime commissioning authority as a sub-contractor to Project Solutions Inc. (PSI). Spokane US Post Office (USPO) is a 160,292 SF historic building in downtown Spokane. This building’s Heating Ventilating and Air Conditioning (HVAC) system was upgraded in the early 1990s. The control system was installed in 1993 and consists of a Barber Coleman 8000 Building Automation System (BAS). The BAS is still operating today.