NOVELTY - The board has two platelike bodies (6, 7) arranged mutually parallel or parallel to each other. One of the platelike bodies is transparent or opaque and made of a material with low emissions. A sealing is arranged and assures the distance and at the same time provides a fluid tight space between the platelike bodies, so that the space between the platelike bodies is utilized for circulation of fluid. A layered construction is provided with an inlet and an outlet for the circulating fluid i.e. water.    USE - Layered solar collector board for use in a solar collector system (claimed).    ADVANTAGE - The layer construction can be extended with a desired number of glass plates, and an increase in the number of glass plates can provide better properties for a solar collector in such a way that the thermal energy emitted is additionally reduced and compared to the solar collector comprising only an outer glass plate. The plates are fluid tightly joined, so that the fluid is not leaked when cooling fluid circulates between the plates. The adhesive material such as structural glue, can be applied on the plates between an outer glass surface and an absorber surface, so that pressure stress applied to the plates is reduced. The board attaches multiple materials on surface positioned between the two platelike bodies, thus reducing the compressive load on the platelike bodies. The joint can be placed in definite one- or two-dimensional patterns between the surfaces, thus increasing the circulation of the cooling medium, and hence improving the capacity to receive sun energy transferred from the absorbing surfaces.    DETAILED DESCRIPTION - One of the platelike bodies is a glass having low emission. The platelike bodies in the layered construction are made of toughened glass, laminated glass or laminated toughened glass. The seal is made of structural adhesives.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a layered solar collector board construction.    External adjacent layer (5)    Platelike bodies (6, 7)    Isolation layer (8)    Cover plate (9)