Features

Cubic ventilation box with intake and extract spigots, with flexible connectors to reduce vibration transmission and variable applicable side panels to suit to structural conditions. Simple positioning by standard crane hooks. Self-supporting enclosure frame construction made of aluminium hollow sections. Double-walled, 20 mm thick side panels made of galvanised sheet steel, sound and heat insulated by lining with non-combustible mineral wool. The enclosure panels can be replaced as required with accessories such as weather louvres and condensate trays. Additional accessories, wall bracket and weather protection roof can be mounted inside and outside as required. Free-running backward curved centrifugal impeller from aluminium, direct driven. Energy efficient with low noise development. Dynamically balanced with the motor to DIN ISO 1940 Pt.1 – class 6.3 Totally enclosed, maintenance-free 3-phase external rotor motor, to be operated via delta-star connection for 2 speed steps, Speed controllable by voltage reduction or with Helios frequency inverter and sinus filter on all poles, thermal contact wired to the terminal box. Low-noise, long-lasting greased, sealed for life ball bearings. Mains supply via terminal box which is fitted externally on the motor as standard (IP 54).