The FLW is a CE marked double-glazed louvred ventilator, which has been carefully engineered to produce a class-leading product. It comprises thermally-broken framework to reduce heat loss and avoid condensation; a requisite feature to ensure compliance with UK Building Regulations.
The frame houses our patented rack & pinion mechanism, which drives the louvres to ensure smooth, maintenance-free operation. Combined with a wide choice of actuators, this makes the FLW a highly versatile unit. The glass louvres are housed in thermally-broken extruded aluminium frames and incorporate pivot bearings to connect to the rack & pinion mechanism.
The louvres are centre pivoted, which means that an optimum free area of ventilation can be achieved - an opening angle of 85 degrees provides a better free area than a traditional window. As a result of thorough development testing, the FLW achieves a high coefficient of opening; ranging from 0.57 to 0.61, subject to size and aspect ratio.
The rack & pinion mechanism also ensures that a good compression seal is achieved when closing the louvres. This provides a particularly important benefit in minimising air leakage. Independent tests show that the FLW28 has a surface area leakage rate of 0.41 m3/hr m2 at 50 Pascals; in accordance with EN 12207.
The Smotec version of the FLW has been fully tested and certified under EN 12101-2 as a natural smoke & heat exhaust ventilator (NSHEV). The louvres are available as either 24mm or 28mm double-glazed insulated blades and can be configured to suit a variety of opening sizes and applications. Insulated aluminium blades can also be supplied.
A range of actuators is available as standard, including 230 volt or 24 volt DC motor drives as well as pneumatic cylinders. Manual operation is provided by a handle fixed to the frame or a crankhandle, which can be either fixed or detachable. Where necessary, a motorised version can be provided, which is programmed to avoid finger-trapping.
The FLW can be supplied with a range of fixing adaptors, to facilitate installation into brickwork, curtain walling & glazing. We can meet specific requirements across a range of sizes, colour finishes and glass specifications.