Had ordered as a replacement for my getting on in heating for my treatment room to me this device. The test showed good functionality in the living room and also a good heat development. However, what is not mentioned in the description of the device, that 3 fans provide in the unit ensures that the heat can be distributed in the room. This is well intentioned, only produce the fans a very unpleasant high twang that a vastly after a few minutes gets on your nerves and ears. That was the criterion ko and I had to send back the heater. Therefore, the points deduction. The company Syntrox Germany gets 5 stars. The contact worked out fine and also the return and refund of the purchase price was no problem. Thanks a lot for this.