The ov12 system is ideal for refurbishment projects or where construction height is at a premium. The system uses a low profi le panel that is laid over existing solid or timber floors. The 18mm thick panels are glued together and then the pre-formed plastic return bends are placed at opposite ends of the room. The 12mm barrier pipe is then laid into the grooves and connected back to the manifold. The system can be directly covered by tile or laminate flooring or a 4mm plywood capping layer used when fitting carpet or vinyl.