Fieger Louvred Window – Type FLW 40 SmoTec


The Fieger FLW 40 System of louvre windows incorporates everything we’ve learnt over the past 20 years of developing natural ventilators. The result is a high quality, good-looking product that has been extensively tested to achieve the highest possible thermal performance.

Key Features:
Certified in accordance with EN 12101-2
Thermally broken extruded aluminium frames with triple-glazing.
Louvres flush-fitting with external frame when closed.

Frame depth: 85mm
Frame height: 40mm
Louvre blade frame height: 28mm

The FLW 40 system has a concealed operating mechanism, comprising maintenance-free rack and pinion, providing smooth, synchronized operation of the louvre blades. They can be delivered fully glazed or ready for on-site glazing, tested and installation ready. They have a maximum frame width of 2500mm with an anodized or polyster powder finish to a standard or non-standard RAL colour for coating.

Useful Tech Data:
Number of louvres: (optional blade height): between 250 & 500 mm. Ready glazed with 40mm triple-glazing or insulated aluminium panels.

Performance: Air permeability Class 4 – EN 12207
Watertightness Class 8A – EN 12208
Coefficient 0.65 – EN 12101-2
Wind pressure Class C2/B2 – EN 12210
Security RC2 – EN 1627
U-value 1.1 to 1.45 W/m2 K (subject to glass specification)
Barrier loading BS 6180: 2011

Installation: Standard fixing adapters available for:
• Curtain-walling
• Glazing systems
• Masonry openings

Control: The following actuators are available as NSHEV tested:
• D + H type LDF 100/60 – 24V DC
• D + H type LDF 100/70 – 24V DC
• WSS type 6000 – 24V DC & 230V AC
• Gröninger LS 1400 – 24V DC & 230V AC
• Gröninger ML 1500 – 24V DC
• GU Eltral S 24 LAM – 24V DC
• STG Beikirch FLA 1200 – 24V DC
• Windowmaster WML 860 – 24V DC


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Founded in Germany in 2000, FIEGER is now a leading manufacturer & global supplier of louvre windows. Their range consists of single, double and triple-glazed units. They can meet virtually any ventilation requirement, including emergency smoke...
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 4th Floor, 399-401 Strand, London, WC2R 0LT

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