In order to control the temperature of a covering, the process of laying a heating line under the individual covering elements is known. However, this leads to various disadvantages. A functional body for a covering is provided which can be temperature-controlled, has an increased stability and is inexpensive to produce. This is achieved in that a bottom side of the functional body can be deposited on a substrate and a top side thereof can be joined together with the covering. The covering may for example be a floor covering, but may also be a wall covering or a cover element, in particular a tile, a glazed tile, a panel or the like for applications for indoor and outdoor regions. A temperature-control means is arranged on or in the top side of the functional body.

The present invention relates to a modular reciprocating panel system designed to support capillary hydronic mats used in building conditioning. The invention features an encapsulated capillary mat comprising three layers: a first metal layer with machined grooves, a second layer consisting of a capillary mat with parallel tubes and manifold tubes, and a third layer with a planar surface. These layers are thermally interconnected to enhance heat transfer efficiency. An exemplary capillary mat is encapsulated between the first and third layers, which are in thermal communication. The invention also includes a spigot system for secure connection of the manifold tubes, enabling fluid communication between reciprocating panels arranged in an array. This system provides improved thermal radiant capacity and uniform panel surface temperatures, optimising energy transfer for building conditioning.