Review on VP 4 by Wiktor Prusek ᠌

An excellent duct fan, most importantly quiet, which is very important for an apartment in apartment buildings. The installation was carried out in the central ventilation system as an additional, forced ventilation, and another one was mounted between the toilet and the bathroom, for air circulation between the rooms. Easily copes with his duties. Ideal for installation in a normal sewer pipe with a diameter of 110 mm.