stands back in amazement you're working on the kitchen at home again :twisted: ??????
since many people have these strange things in their flats, and vent out of the top of a window when they use it, the height above seems not to matter. not sure about any regs, but since it supposedly only churns out hot air (what here :roll: :lol: ) there should not be a problem. big thing seems to be to keep the rain and any stray animals from blowing back into the machine, so a 90degree hood at the exit seems prudent, aimed downwards.
maybe you should aim it to blow air over the pond :lol: :lol: keep the carp hot :roll:
seriously though i think the only real problems are where you are placing machine and can you vent direct to outside wall. have you read the manual to see whether they mention anything about heights???? or tried the makers for their advice. :?
paul :wink: