Stainless steel octagonal roof exhaust fan

Product features:

• All aluminum / all stainless steel construction, light weight, effectively reduce the roof load;
  Impeller balance rating up to ISO 1940 G2.5 balance level;
  Floods, collectors integrated molding, extreme rainstorm extreme cases without water, no deformation;
  Beautiful appearance, compact structure, reliable operation;
  Patented products, side of the wind design, air flow organization smooth;
  Standard EC external rotor motor, low noise, energy efficient;
  Intelligent control, soft start, adjustable speed, stepless speed change;
  Standard gravity return valve, keep the workshop closed, to prevent cold air pouring;