Abstract: A door structure, for use in combination with upright refrigerator and freezer spaces, which utilizes heat transfer by forced convection, of the kind used in everyday commodity stores to display goods on sale. The door has two glass panes which together with a frame embracing the edges of the glass panes, either completely or partially, form a door leaf. The glass pane which faces towards the warm atmosphere of a shop area is provided on the surface thereof facing away from the shop area with an electrically conductive coating, which is operative to heat the outer pane electrically. The door has solely two mutually parallel glass panes, of which the glass pane facing towards the colder refrigerator or freezer space is provided on the surface thereof which faces towards the colder space solely with an infrared radiation reflective coating or layer.

Abstract: A glass cover or lid for a chest freezer of the kind in which the goods contained therein are intended to be viewed through the glass cover and which chest is constructed so that a substantially stationary cushion of air can be generated immediately beneath the glass cover, preferably a chest which lacks devices for forcibly circulating air in the chest. The glass cover (1) includes a glass panel or two mutually parallel panels, and the side of the glass cover facing inwardly towards the interior of the chest is provided with a layer for reflecting infrared radiation.