ENR 20, ENR 25, ENR 31

ENR.. with TRE 5-step transformer W 1/WU 1 reversing switch

TRE: 5-step transformer (on/off, 5 speeds)

W 1/ WU 1: Reversing switch (air extraction – 0 – ventilation)

MK, BK: Electric shutter

* Cable only for MK electric shutter