flexwatt question

Ok, this may seem strange, but I just have to ask.... Is there a front/back, top/bottom, heat emitting/non-heat emitting.... side to 11" flex watt???

We are building a rack system, and have everything set to go when suddenly someone asked if there was a correct way to put the flexwatt on the board... there is a difference in appearance from one side of the flexwatt to the other, so now we wondered if there would be a heat emission difference as well...???

Any info would be greatly appreciated as we would like max heat to the tubs and not to the solid wood back!!

Thanks all

No i don't belive there is a certain way it has to be run because I bought a rack from RBI and had it with belly heat and they ran it with one piece on 4 shelves. one shelf oneway then down to the next shelf on the oposite side of the tape. I hope this helps!

I doubt it would make much difference either way.