Material and Design Features

• Vertical Sliding: Sash front shall be 6mm toughened glass supported from the bottom by a full length aerofoil shaped handle attached to counter weights by stainless steel cables. The cables shall run on ball bearing centred pullies to weights concealed in aero-foil shaped anodised aluminium columns fitted to the front of the fume chamber. Sash cables must be attached to the lifting mechanism at the bottom, not to the glass, and the sash weights must be accessible from the front of the unit.
  
  
• 30W HPF fluorescent light: The light is mounted externally on top of the fume cupboard and separated from the fume area by a sealed 6mm toughened glass panel. The lighting gives a minimum of 400 lx at the work surface.
  
  

• Working Base: Constructed from “ASAH®” and form an integral part of the fume chamber with radiused corners and incorporating an anti-spill lip. When alternate base materials are selected they shall be fully sealed to the chamber and radiused. Removable work bases or those which incorporate a sump will not be acceptable. 

• Sinks, tundishes, wet and dry service: These are supplied and fitted as per the schedule of requirements and drawings. Remote valves for the wet and dry services shall be positioned so they do not create eddies at the face opening. All fittings in the working base of the fume cupboard must be fully sealed.