For opening, the particularly sturdy oven door with its large panoramic safety - glass window is tilted down and can be used as a resting surface, even for heavy roasting dishes. Each phase of the baking and roasting procedure can be observed closely through the unusually large, non - glare panoramic window, and due to the extra - bright 100W halogen light. The oven door is protected with five layers of glass. This means that when the interior temperature reaches 390°F & 176°F, the outside surface of the five - layer door does not heat up to more than 104°F & 176°F. Even when the pyrolytic self - cleaning system, which produces a maximum temperature of 905°F & 176°F inside the oven, is in operation, the oven door cannot heat up to more than 175°F & 176°F. In order to cool the housing of the Gaggenau EB 388 oven, air is drawn in through the bottom of the appliance and warm air blown out at the top. The fan operates particularly quiet.