I have now installed the 2.5Kw auto heater, and - importantly - kept an eye on first charge: a fair amount of steam vented off. I reckon the fire bricks absorbed moisture, even though I wrapped in tarpaulin; prior, to install: too heavy to move, on the mini-pallet; the driver, and I struggled to carry them to my frontage! I think this dampness made fitting the bricks difficult: they jammed - tightly fitting - and, yes, they were right way round. Element packing, and case structure is minimalist. I got a bag of -unneeded screws/ hole plugs...confusing: the feet just clip in. Now that the heater has been, 'run-in', I am delighted with it. It is slim, good looking design: bolting to wall is essential; as expected. Technical aspects I like: the multiple over heat stats; the control Input thermostat, with 2 sensors;; the resistor/ bi-metal strip, that shuts the flaps automatically during charge. Overall: Good looking, functional heater, at excellent price: easily matches the opposition, in same price bracket, I fully recommend, with one caveat: take care with assembly, and case handling. Dave