Gek fan 200mm stainless steel
The GEK 200 mm fan is made of stainless steel. The GEK will not rotate but will position itself perpendicular to the wind by means of the wind cock on top of the GEK ventilator.
With an opening in the hood the wind will be blown over the ventilation duct. Because of this effect there will be under pressure  which will improve the draught. The GEK fan is mainly used on fireplaces and ventilation ducts.
The GEK already functions at wind speeds of 1m/s.
This fan is only suitable for mounting on a flat roof.