RTS5 is compatible with Fantech VHR70, VHR70R ES, Flex 100H ES, VHR100R ES, VHR150,VHR150R, VHR200R, VHR200R-EC, SHR150 and SHR150R. The push button activates the system to run in continuous mode for 20, 40 or 60 minutes, it then returns to the predetermined setting. To cancel this operation, simply press the button a fourth time.