R model in the figure. In the L model, the parts are mirrored.
Supply air fan
Extract air fan
Fine filter for supply air
Heat recovery cell 2 pcs
Bypass flap
Coarse filter for supply air
Coarse filter for extract air
Post-heating radiator
Safety switch
Control panel
Carbon dioxide sensor
Humidity sensor
Internal humidity sensor (behind the electric box)
Post-heating liquid radiator