Aeromech offers By Pass Type Fume Exhaust Hood . These are designed in an innovative manner so that when the front sash closes it causes re-distribution of air entering the hood through the sash opening. This eliminates high velocity air streams in the near closed position of the sash. The by-pass opening above the sash minimizes fluctuations in velocity as the sash is raised or lowered. The hood is ideal for use with fragile apparatus and instrumentation. We offer fume exhaust hoods of international standard and at very competent price.