Ventilators with air flow up to 1660 m3/h into circular ducts for diameters 100 - 315 mm. The throats are gasketed, the enclosure consists of a patented vector noise absorber and a noise absorbing layer (TD 350 - 1000) or fibreglass noise insulation (TD 1300, TD 2000).
The fans are made of tough plastic (TD 350 - 1000) or galvanized steel sheet (TD 1300, TD 2000) and are equipped with a 230 V / 50 Hz EC motor with thermal and electronic protection. The fans are IP44 rated and suitable for operation at air temperatures up to 40 °C.
The motors are adjustable by a potentiometer in the terminal block or by an external controller.