Safety Storage™ specializes in custom pre-engineered hazardous material storage buildings requiring the use of refrigeration units for applications such as the storage of organic peroxides where temperature control is critical for personnel safety. This Sustainability Control System utilizes a programmable logic controller to operate redundant refrigeration units. It cycles the units every 7 days to ensure the interior climate does not exceed the pre-determined maximum temperature. Safety Storage, Inc.,, (800) 344-6539. Circle 276control