what is "source" used for?

[yang]

Hallo,

in WUFI 2D 3.3, there is a "source" in the control panel, however, there is no that thing in the teachin movie, and actually, man can not modify in the "source".

what is that for?

thank you.

[Christian Bludau]

Hello yang,
with sources you can add heat, moisture and air exchange sources in the construction. Please see the tutorial section for more information:
http://www.wufi.de/frame_en_tutorials.html
Christian