I have a Mitsubishi ducted air handler using a Mitsubishi branded MRCH1 RF thermostat and a MIFH1 receiver.
They communicate with a 900 MHz RF signal, and are RedLINK compatible, though I don’t know if they use RedLINK to communicate with each other. Is there any reason to think a Flipper One wouldn’t be able to receive and send the right signals to control the system?