In order to achieve dissipation of heat from large areas of glazing in buildings in which solar radiation is directly incident, three are provided opposed glazing members as in an extruded panel (5) through which a heat exchange liquid flows in a closed circuit to dissipate its heat at a location remote from the window. The heat exchange liquid is colored in such manner as to allow solar radiation incident on the front glazing member to pass through the heat exchange liquid so that its infrared component is at least partially absorbed and the colorings of the heat exchange liquid and of the glazing members are such that light is able to pass therethrough into the room provided with the glazing.
A filtering device for use in shutting out a greater portion of the ultraviolet and infrared rays but admitting the passage of visible lights indispensable to the growth of plants and human life, the device including a mixture and a container for holding the mixture, the mixture containing water, a compound dissociable into ferrous salt ions, and at least one of L-ascorbic acid and D-ascorbic acid, the container comprising transparent members disposed face to face with each other, with the mixture confined therebetween.
