Where does “вентилатор” come from?
вентилатор (Serbo-Croatian) comes from Serbo-Croatian вентили́рати, from Latin ventilāre, from Latin ventus, from Proto-Italic wentos, from Proto-Indo-European h₂wéh₁n̥ts, from Proto-Indo-European h₂wḗh₁ti, from Proto-Indo-European h₂weh₁- — to blow.
вентилатор (Serbo-Croatian): fan, ventilator
Ancestry of “вентилатор”, step by step