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Material
Material thickness
U value (from 1995)
Solid wall
(Vertical coring brick, floating brick or comparable porous
or highly perforated materials)
≥ 30 cm
0.5
Solid timber wall
(e.g. log cabin, prefabricated house, timber frame or timber
panel wall with insulating filling)
–
0.4
Passive house
(KfW 55, 40, 40 Plus)
–
0.15–0.2
Requirements and peripheral conditions for non-ducted recirculation (Plug&Play installation):
• The heat transfer coefficient to adjacent walls and floors should be no higher than 0.5 W/(m²K). If this is the case, ducting and a
plinth box should be used. Further information is provided below and in the operating instructions.
• Adequate ventilation via the plinth must be guaranteed. To achieve this, the plinth panel must be shortened or cut-outs created. The
cross-sectional area should be at least 425 cm². The minimum plinth height is 25 mm.
• The distance between the vent and the rear panel must be at least 25 mm.
• In the case of base units with a depth of more than 60 cm, special accessories include an extension set (DVS 150) to bridge the distance
between the fan connection and the opening in the housing unit.
• A drilling template is provided with the appliance to assist in creating a cut-out in the rear panel with a diameter of 150 mm. Miele recom-
mends the use of a compass saw to prepare the rear panel for installation. Further information on the template is provided below and in the
operating instructions.
• The automatic fan run-on in Plug&Play mode should not be interrupted in order to ensure that residual moisture is expelled from the housing
unit.
Further notes on the U value in non-ducted recirculation mode (Plug&Play installation)
Plug&Play operation is possible in younger or renovated buildings. If the adjacent wall or the floor is in contact with the ground or the outside
air, it must have a heat transfer coefficient (U value) of ≤ 0.5 W/(m²K).
The U values for other materials can be found on the websites of the German Federal Ministry for Economic Affairs and Climate Action and the
German Federal Ministry of the Interior and Community. If you have any other questions about your building, please contact a construction
expert or energy adviser.
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