OS3 – ventilator cover
for ventilators Ø 500- Ø 710mm
OS4 – ventilator cover
on ventilator 1370x 1370mm
FW – ventilator light filter
to ventilator 1370x 1370mm
- light filter made of ABS in galvanized metal frame
- light filter, ABS cartridge
- light, stiff and strong
- easy to keep clean (can be cleaned with Kärcher machines)
- super- low ventilator's efficiency losses
Z1 – insulated winter cover
for ventilators 1370x1370 mm
(made of ABS + isolating material)