Abstract: A vertical maltdrying kiln is described whereby several flow zones for the drying air are provided within a vertical malt compartment. At least in the uppermost flow zone at least one airduct with perforated sidewalls is provided, which extends in the transverse direction through the malt compartment. In the uppermost flow zone, the drying air enters through this airduct and optionally through perforated sidewalls in the transverse direction, while it escapes in the upward direction. Preferrably, a lower malt discharge lock is perforated, so that drying air may enter into the lowermost flow zone. This drying air may escape through perforated sidewalls or through airducts with perforated sidewalls. Preferrably, the entire drying air of all flow zones may escape in the upward direction through the upper open end of the malt compartment.