Verified by manufacturer 4 months ago
Coltlite CLET (thermally broken)
Certificate of constancy of performance
Certificate type
Natural louvred glazed ventilator, suitable for natural day-to-day ventilation and smoke control.
Can provide inlet and extract ventilation as well as the entry of natural daylight for most kinds of industrial and commercial buildings. Suited for installation into the facade.
Typical applications are hospitals, schools, shopping centres, apartments and commercial buildings.
Natural louvred glazed ventilator, suitable for natural day-to-day ventilation and smoke control.
Its form and function makes it particularly suited to naturally ventilated buildings where good aerodynamic and measured free area ventilation is required while achieving high acoustic, thermal and aerodynamic performance. Whilst it is primarily designed as a glazed element of the building envelope, it can also be applied as a high specification fire, smoke and air control damper.
Features and benefits:
Color | Silver Other |
Finish | Anodized Powder-coated |
Material | Aluminium Glass |
Shape | Rectangle Square |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Uniclass | |
CAWS | H11/140 Louvres |
Product range |
Standard | To BS EN 12101-2; EN 14351-1. |
Mounting | Wall-mounted. |
Reliability classification | Re 1000. |
Snow load classification | SL 0. |
Low ambient temperature classification | T (-15). |
Wind load classification | Up to WL 3000.Guidance for specification option: Aerodynamic coefficient: Up to 0.58. Resistance to wind load: Class C5. |
Resistance to heat classification | B300. |
Arrangement | Louvred, centre pivots.Guidance for specification option: Standard. Louvred, other.Guidance for specification option: On request; consult manufacturer and insert requirements. |
Dimensions | |
Width | Manufacturer guidanceInsert requirements; overall width: 300–2000 mm. For throat dimensions, subtract 80 mm. |
Height | Manufacturer guidanceInsert requirements: Overall height: 250–3000 mm (per ventilator). For louvre height (blade pitch), see Pitch below. |
Controls | Manual (lever).Electric, 24 V d.c. motor.Guidance for specification option: Frame mounted and painted motor (hidden behind side frame profile) positioned at top or bottom on either side of frame and with a typical operation time of 20–60 seconds. Electric, 230 V a.c. motor.Guidance for specification option: Frame mounted and painted motor (hidden behind side frame profile) positioned at top or bottom on either side of frame and with a typical operation time of 20–60 seconds. |
Initiation | Local thermal fuse.Guidance for specification option: Opens the unit at a pre-selected temperature (pneumatic cylinder control only). External release signal.Guidance for specification option: Insert requirements. Manufacturer guidanceInsert requirements. |
Materials | |
Ventilator | |
Frame | Corrosion-resistant extruded aluminium alloy, thermally broken.Guidance for specification option: Depth: 47 mm; face frame width: 40 mm. With stainless steel fixings. |
Louvres | Corrosion-resistant extruded aluminium alloy, thermally broken. |
Glazing | Insulated glazing, clear float glass.Insulated glazing, clear toughened glass.Insulated glazing, clear laminated glass.Composite infill panels.Manufacturer guidanceStandard thickness: 28 mm (4 mm glass/ 20 mm gap/ 4 mm glass). |
Finish | Anodized.Guidance for specification option: 20 µm thick standard thickness. Polyester powder-coated.Guidance for specification option: 60 µm thick standard thickness. |
Colour | Natural.Guidance for specification option: Anodized finish only. RAL, single colour.Guidance for specification option: Insert requirements. RAL, dual colour.Guidance for specification option: Different colour inside and out; insert requirements. Manufacturer guidanceSpecial colours are available on request. |
Accessories | None.Speed/ force reduction device.Guidance for specification option: Reduces the speed and force of closing louvres, to reduce the risk of finger squeezing (some electric versions only; consult manufacturer for details). |
Pitch | 225 mm with central pivot point. |
Air permeability | Class 2. |
U-value | 1.98 W/m²K. Guidance for specification option: Maximum, to EN 10077-1. |
Sound insulation | Up to 41 dB. Guidance for specification option: Maximum. |
Watertightness | Class 4A. Guidance for specification option: To EN 12208; watertight to 150 Pa. |
Blade angle | Maximum 90°. Guidance for specification option: Depends on the drive selected. |
Fixing | To curtain walling. Guidance for specification option: Using separate adaptor. To structural opening using through frame fixings. To structural opening using strap fixings. |
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