A technology includes a first plate including a first pair of legs defining a first channel; a second plate including a second pair of legs defining a second channel; a first block supporting the first plate and the second plate such that the first block is positioned between the first channel and the second channel; a second block including a U-shaped trench with a first open end portion and a second open end portion, wherein the first open end portion leads to the first channel, wherein the second open end portion leads to the second channel; a tube extending within the U-shaped trench; and a U-shaped cover covering the U-shaped trench.

Floor and ceiling panels and methods of constructing a floor system for a building are described. In some embodiments, a panel includes a plurality of joists, a corrugated form deck disposed above and attached to the plurality of joists, a ceiling substrate disposed below and attached to the plurality of joists, and an in-floor radiant heat member disposed between the corrugated form deck and the ceiling substrate. In some embodiments, the panel includes a plurality of joists, a corrugated form deck disposed above and attached to the plurality of joists, and a sound dampener disposed between the corrugated form deck and the plurality of joists. In some embodiments, the method includes attaching a pre-assembled panel to a frame of the building and pouring concrete onto the panel so that a radiant heat member is separated from the concrete by a corrugated form deck of the panel.

A thermally conductive composite element is particularly suited for use in a surface heating system or in a surface cooling system. The composite element has at least one main part which contains expanded graphite and at least one flat textile structure disposed on one face of the main part. The textile structure is connected to the face of the main part by an inorganic adhesive.