| 摘要 |
<p>A window in which the room-side pane (24) is formed as an electric heating element and the surface (13) of an outer pane is provided with a coating in order to reflect back heat radiation. In order to facilitate installation and maintenance both the heating element and the air stream channels including their operating and adjusting means have been placed in a separately installable unit formed by the inner casing (3) and the middle casing (4) connected to it.</p> |
