The UTY-TTRX Thermostat Converter from Fujitsu General America is designed for high-efficiency Halcyon mini-split and Airstage variable refrigerant flow heating and cooling systems, allowing them to be controlled by a third-party thermostat. Up to 16 indoor units can be controlled as a group by a single unit. It works in conjunction with all condenser and evaporator types. By installing the converter between the third-party thermostat and Fujitsu General America system, control of the heating and cooling system is provided, including on/off control, operation mode, room temperature, fan speed, and error notifications via LED lights. 888-888-3424; www.fujitsugeneral.com.