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Glazed-in louvre wit chevron section blades, heavy-duty series 4 2 8<br />
m a t e r i a l<br />
c r o s s - s e c t i o n s<br />
• Made from aluminium sections: AlMgSi 0.5<br />
(according to EN 12020-2)<br />
• Finishing: anodised in satin/bronze colour (20 microns)<br />
or powder-coated in any RAL or Syntha Pulvin ® colour<br />
(60-80 microns) (for UK min 40 microns)<br />
• Stainless steel 304 insect screen (2.3 x 2.3 mm)<br />
or mesh (6 x 6 mm) on request<br />
o p t i o n s<br />
• Water channel<br />
• Controllable type 428/VA – same build as type 414/VA<br />
Overall dimensions<br />
Overall dimensions<br />
Overall dimensions<br />
f i x i n g<br />
• To be fitted like double glazing<br />
d i m e n s i o n s<br />
• Frame thickness: 24 or 28 mm<br />
• Specify on ordering: full width x height in mm<br />
• Minimum dimensions: 220 x 220 mm<br />
technical specifications 428<br />
Airflow (EN 13030)<br />
K-factor (supply) 61,04<br />
K-factor (discharge) 61,04<br />
C e coefficient 0,128<br />
C d coefficient 0,128<br />
Technical data<br />
Visual free area 59%<br />
Physical free area 43%<br />
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