Material:
Main frame and blade members: Extruded aluminium
Mechanical fixings: Stainless steel screws and pop rivets
Additional parts: Vulcanised fibre sealing washers
Sizes:
Minimum: 200mm wide x 280mm high (nominal)
Units can be made with a height down to 200mm high (nominal) however will only have a single visible blade
Maximum: Unlimited (when manufactured in sections, see page 11 for more information)
Blade:
Twin part ‘Air-Bypass’ blade, 80mm pitch
Frame:
Standard: Flanged
Optional: Recessed and reversed
Fixings:
Standard: Integrated rear fixing flange
Finish
Standard: Mill aluminium
Mass/m2:
30kg (based on 1m x 1m nominal size unit, smaller units will be proportionally heavier relative to their size)
Free area:
Approx. 50% (varies with size)