HEATING, VENTILATION AND/OR AIR CONDITIONING UNIT FOR A CAR

A heating, ventilation and/or air conditioning unit () for a car is specified, having a first air guide () for guiding a first, cold air stream and having a second air guide () for guiding a second, warm air stream which is separate from the first air stream, wherein a heating device () for warming the second air stream is arranged in the second air guide (). The heating, ventilation and/or air conditioning unit () furthermore has a first mixing chamber () and a second mixing chamber (), wherein the first mixing chamber () and the second air guide () each have at least one inlet opening () to the second mixing chamber (). In the second air guide (), there is arranged a flap () which is movable between a closed position, in which a flow path of the second air stream to the first mixing chamber () is closed, and an open position, in which the second air stream can flow into the first mixing chamber (), wherein the flap () is arranged downstream of the heating device () and at an inlet opening () of the second air guide () into the first mixing chamber ().