what people don't realise as well is that it is not the size of the room but its heat loss, so even a 1Kw heater is good enough to heat a larger room provided the heat loss is considerably less than a kilowatt.
I can't remember which store it was, I picked up a pair of trousers, and asked if I could try them on and where is their fitting rooms, the answer was we have not got any fitting rooms, you can buy them and if they don't fit you you can bring them back for a full refund!
I wonder if that also applies to their underpants!
I cant see what the problem is, OK if its faulty and dosent work,
but this was a case of an item being returned because the purchaser changed their mind about the product,
The checks were on Electrical safety and down to the possibility that a purchaser may have interfered with it and made it dangerous.
I dont think the returns policy covers something that has been deliberately damaged by the purchaser.