Zero Level AD is an ultra-thin underfloor heating and cooling system, which represents the ideal solution for retrofit projects. It is easy to install directly onto the existing floor or onto a high-density insulating slab (> 400 kPa). The system includes RDZ CLIMA PB pipe Ø 12 mm and perforated panels made of 1-mm compact polystyrene with high density and self-adhesive back. Its special design with holes ensures that the levelling compounds can flow in and bond directly with the substrate.