Miele PDR 914 Operating And Installation Instructions page 59

Configuring the
room ventilation
opening
For example 1
For example 2
For example 3
 Rooms in which rotary irons and tumble dryers are operated
must have an induced ventilation system (e.g., ventilation slots in
windows and doors, wall openings with grilles, or opened windows
or skylights).
A duct diameter of 6" (150 mm) was specified in example 1. Accord-
ing to this duct diameter, a room ventilation opening with a size of
17' 5" (531 cm) is required. The edge length is 9 1/16" (230 mm) (see
Table 3).
A total duct diameter of 8 11/16" (220 mm) was specified. According
to this duct diameter, a room ventilation opening with a size of
37' 4" (1,140 cm) is required. The edge length is 14 13/16" (377 mm)
(see Table 3).
Since in this case the tumble dryer is connected to a central air sup-
ply, additional ventilation openings are not needed.
Installation
59