A heating device for building heating, with a combustion chamber and a slide door slidable along a vertical direction (z) of the heating device, wherein - the slide door comprises a frame mounted slidably along the vertical direction (z), as well as an at least partially translucent pane, which is connected to the frame pivotably around a first rotational axis, wherein the first rotational axis extends perpendicularly to the vertical direction (z); - the pane can be positioned in a first pivot position in a first vertical final position of the frame, in which the pane closes a first side of the combustion chamber, wherein an inner side of the pane faces the combustion chamber; - in the first vertical final position of the frame, the pane is positionable in a second pivot position, in which the inner side of the pane is accessible from outside of the heating device; - the frame is slidable together with the pane into a second vertical final position if the pane is in the first pivot position, wherein the combustion chamber is accessible from the outside of the heating device via the first side of the combustion chamber if the frame is in the second vertical final position; - the heating device comprises a channel extending on the first side of the combustion chamber and outside of the combustion chamber, wherein the first rotational axis is situated in the channel if the frame is in the first vertical final position; - the heating device comprises a cover plate, which closes the channel if the frame is in the first vertical final position and the pane is in the first pivot position; characterized in that - the slide door comprises a guide element attached to the pane; - the heating device comprises a counterpart rigidly connected to the cover plate; - the guide element and the counterpart are arranged and formed such that the guide element engages with the counterpart if the pane is in the first pivot position and the frame is slid from the second vertical final position into the first vertical final position; - the cover plate and the counterpart are mounted rotatably around a second rotational axis parallel to the first rotational axis, wherein the second rotational axis is situated within the channel; and - by pivoting the pane from the first pivot position into the second pivot position, a force can be transferred from the guide element to the cover plate via the counterpart to rotate the cover plate around the second rotational axis. - the slide door comprises a frame mounted slidably along the vertical direction (z), as well as an at least partially translucent pane, which is connected to the frame pivotably around a first rotational axis, wherein the first rotational axis extends perpendicularly to the vertical direction (z); - the pane can be positioned in a first pivot position in a first vertical final position of the frame, in which the pane closes a first side of the combustion chamber, wherein an inner side of the pane faces the combustion chamber; - in the first vertical final position of the frame, the pane is positionable in a second pivot position, in which the inner side of the pane is accessible from outside of the heating device; - the frame is slidable together with the pane into a second vertical final position if the pane is in the first pivot position, wherein the combustion chamber is accessible from the outside of the heating device via the first side of the combustion chamber if the frame is in the second vertical final position; - the heating device comprises a channel extending on the first side of the combustion chamber and outside of the combustion chamber, wherein the first rotational axis is situated in the channel if the frame is in the first vertical final position; - the heating device comprises a cover plate, which closes the channel if the frame is in the first vertical final position and the pane is in the first pivot position; characterized in that - the slide door comprises a guide element attached to the pane; - the heating device comprises a counterpart rigidly connected to the cover plate; - the guide element and the counterpart are arranged and formed such that the guide element engages with the counterpart if the pane is in the first pivot position and the frame is slid from the second vertical final position into the first vertical final position; - the cover plate and the counterpart are mounted rotatably around a second rotational axis parallel to the first rotational axis, wherein the second rotational axis is situated within the channel; and - by pivoting the pane from the first pivot position into the second pivot position, a force can be transferred from the guide element to the cover plate via the counterpart to rotate the cover plate around the second rotational axis.