Building services manufacturer and contractor Colt International has launched a highly versatile single bank extruded weather louvre designed to provide robust rain defence in tandem with natural ventilation.
The EWL louvre system provides comparable weather protection to a double bank louvre, but at considerably lower cost. It achieves Class A rain defence up to 3 m/s and has been independently tested to EN 13030:2001.
The EWL louvre is extremely aerodynamically efficient with a pitch of 50mm at 45°to maximise rain defence and, because this reduces air resistance, the size of the plant and the ventilation aperture can be minimised to reduce lifecycle running costs.
The louvres are made from corrosion resistant extruded aluminium; so are hard wearing and very low maintenance. They are clipped – rather than riveted or screwed – to structural supporting mullions, which allows for thermal expansion without distorting the pitch of the louvre blades.
Colt has designed the EWL system for ease of installation and they can be pre-assembled off site or delivered to site in kit form. EWL louvres are available in mill finish aluminium or polyester powder coating and can also be supplied with either internal or external flange frames.