Abstract: Air exchange device for buildings, comprising: a casing having an internal inlet opening, an internal outlet opening, an external inlet opening and an external outlet opening, a heat exchanger housed within said casing and having a first inlet in communication with the internal inlet opening, a first outlet in communication with the external outlet opening, a second inlet in communication with the external inlet opening and a second outlet in communication with the internal outlet opening, a first fan unit arranged for generating a first airflow directed from the internal inlet opening towards the external outlet opening and a second fan unit arranged for generating a second airflow directed from the external inlet opening towards the internal outlet opening.

Abstract: Air exchange device for buildings, comprising: an elongated casing; a heat exchanger housed inside said casing; and a first fan unit and a second fan unit arranged to generate respective airflows in a relationship of mutual heat exchange in said heat exchanger, wherein the first and the second fan units each comprise at least one electric fan having a hollow support casing having an intake opening and a discharge opening, wherein a duct for the passage of an airflow is defined within said support casing, which contains an electric motor that drives a rotor; a damping elastic support of low-density polymeric material housed inside said casing, wherein said electric fans of said fan units are supported in a freely floating manner within their respective seats formed within said damping elastic support.

Abstract: A connection device for a roll-bond heat exchanger comprising two sheets fixed together on opposite sides with respect to a central plane and a plurality of channels for circulation of a fluid that are formed between said sheets. The connection device comprises at least one pair of connectors in fluid communication with said channels, and each of said connectors is situated on just one side with respect to said central plane.

Abstract: A solar receiver for a linear-focusing solar concentrator, comprising, a base, which is elongated in a direction parallel to a focal line and carries an array of strip-shaped targets arranged orthogonal to said focal line and set at a distance apart from one another in a direction parallel to the focal line; a focusing assembly including an array of optical elements arranged for focusing solar radiation on said strip-shaped targets, the focusing assembly being mobile with respect to the base of the photovoltaic receiver in a direction parallel to said focal line; and an azimuthal pointing device, designed to move the focusing assembly with respect to said base as a function of the position of the sun.