The dry hollow floor system FLOOR and more® comfort creates a pleasant environment for the occupier by its intelligent heating and cooling. The hollow floor panels type comfort consist of fibre-reinforced calcium sulphate. Pre-milled grooves for taking up the heating and cooling lines are closed after the installation by a filling compound. The gluing of the FLOOR and more® panels is made with a special tongue and grooving at the edges of the panels which are forming a closed load bearing layer. The substructure consists of height-adjustable zinc-coated steel pedestals from our own production which form the necessary cavity for installations. The hollow floor panels FLOOR and more® in combination with a dry mineral fill and a decoupling level create the necessary weighting of the solid wood ceiling, which can optimally be used as substrate for the necessary installation.