Any Prima Klima fan with an RJ45 socket will take this controller. Dial the fan anywhere from 0 to 100 percent. Two numbers matter: the slowest speed it idles at, and the fastest it ever runs. You set both. The supplied thermostat handles the rest, nudging the fan up and down as the room heat drifts past your target.
Auto mode runs it hands-off. Manual mode gives you the dial back when you want it. Power is 230 volts at 50Hz. The thermostat trails on a 2-metre lead; a normal ethernet cable links box to fan. No wiring, no fuss. Made for the EC-Blue fans, one-year warranty.