I recently have had my pj installed and enjoying every moment except for the constant whinning and purring from the fan. Can I expect quiet performance from this model or am I being too picky I can see which fan needs replacing but was also wondering whether it is an item I have to obtain from Owl. Can I get the equivilent or better from Maplins or another specialist supplier- if so can anyone supply details? After all I dont expect Seleco actually manufacture the fan so they must buy in from somewhere. I know from my PC building experiences there are many fans out there its just a matter of getting the right one. Any help please.