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Message: <blockquote data-quote="Reptech" data-source="post: 559744" data-attributes="member: 38266">Possible so I suppose. I hadn't really considered that, a lack of oil from new. It seems a bit of a dark art, correct lubricants and bearing types and all that, not something I really know anything about in detail.The bearings will also run quite warm I suspect in situ as its pulling hot air from the core through the fan. One very interesting discovery (and it makes you wonder how widespread this might be across both these and the Quantum range) is that the energy intake of the heater overnight is higher with the fan not running up to speed because the room is then not heated as efficiently as it should be and the heater then decides it needs more heat in the core to achieve the desired temperature. I've noticed my daily kW usage (it displays all this on the little control panel) has come down significantly and of course the core temp is lower (also displayed) while the room is more comfortable.I wonder if lubricating the fan is going to become something of a regular maintenance item for me?</blockquote>