Trane Communicating Thermostats are ideal for existing building retrofits and controls upgrades when integration with a building automation system is desired. Existing thermostat wire and junction box and conduit can often be re-used to reduce installation hardware and labor cost. A hinged PCB board, removable terminal blocks, and onboard configuration can further reduce installation and commissioning time and expense. With Trane's Communicating Thermostats, increased energy efficiency can be gained through use of optional covers with built-in occupancy sensors and the optional economizer output on rooftop units.