To create holes, use a brace and bit to drill through the flooring, and then a keyhole saw to widen the entrance. Make sure that the holes are not exactly above a floor joist when you drill them. In fact, the joists & studying must be spared as much as possible while installing the water heater equipment.
Generally speaking, ceramic tiles encompass any stiff tiles fashioned from natural earthy clays & hardened by fire. Porcelain & ceramic tile fall into this wider group. However, porcelain tiles have their own category in the current tile market because they fulfill a set of requirements.