Vrv-1x ventilators are manufactured in 13 sizes with impeller diameters from 315 to 1250 mm and provide a range of performance modes from 200 to 14,400 m3/h and at full pressure up to 12,400 pascal. Technical characteristics of these ventilators correspond to the best foreign models and they completely replace the well-known series of Russian ventilator vvd (high pressure fan), vr-120-28, vr-132-30, vr-140-15, vir-100 (200, 300, 400, 600).