Dear Master Lee, I read in your site that its best to have the toilet share an external wall. However, I am looking at a 2-storey house whereby the toilets on the 2nd floor are quite near to the center of the house. Also, I am not sure whether the walls can be considered to be external. What I mean is that the wall is actually still overlooking the balcony. Is such an arrangement bad? Finally, how do we determine the facing of a toilet? Is it the direction of the toilet door? Thank You very Much, Lionel