Abstract: In a wood burning heater of the type having a relatively large glass window in the side of the heater for viewing the fire within the heater box, a door for shielding the glass window from the fire when the door is closed, a vent for controlling the flow of air to cool the glass and means for opening and closing the door, such that the vent must be open permitting air flow to cool the window in order for the door to be opened.

Abstract: A stove has a firebox for burning solid fuels such as wood or coal, an opening in a side wall communicating with the firebox, a window housing surrounding the wall opening and protruding laterally from the stove, a transparent window pane mounted in the window housing in alignment with the wall opening and through which the interior of the firebox may be viewed, and a door assembly arranged in the window housing between the window pane and the wall opening. The door assembly includes a door having first and second panels, with hinges connecting the lower edge of the first door panel to the upper edge of the second door panel for pivotal movement about a first horizontal axis. Inclined track members extend downwardly along the interior sides of the window housing and inwardly away from the window pane.