Hoping someone can help on a little problem of mine !! I have a 2.2KW 3phase extractor fan motor which is bifurcated (insideseperate ducting within the flue). The fan motor is controlled by a transformer type device rather than an inverter. The motor seems to be getting very hot at slower speeds. I am considering extra cooling by inserting a 4" axial fan (bathroom extractor fan) into the ducting access plate to add extra cooling. Question is, is there an easy way on monitoring the motor's temperature? to avoid burning the thing out? I thought about one of those digital thermometers with a long probe that you can use when cooking turkeys etc. Would this work? What sort of temperature would be normal for a fan motor running at low speeds? Any help would be greatly appreciated. Cheers. Brad.