It is an unfaced stone wool board, manufactured in two different types as Solar 35T and Solar 40T which are certified by SPF for outgassing. It is used for the thermal insulation of solar collectors.
Solar boards are used for the thermal insulation of solar collectors. If the case height is suitable, the product is placed between absorbing surface and the soffit insulation by leaving a 10 – 20 mm gap. In order to ventilate the collectors, 2-3 mm diameter holes should be drilled where rain water cannot reach. Otherwise, it may cause condensation of water vapor on window panes at nights and that may affect the efficiency of the collector. When Solar 35T and Solar 40T products are used no stain appears on the collector panes even if there is condensation.