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As shown below in the example, 304 would be 78cm x 98cm and the bottom window code 4 would be 114cm x 118cm. Keylite Smoke Ventilation. Roof window replacement. Keylite Electric Operation. VELUX roof terrace VELUX INTEGRA electric top-hung roof window. Window Actuators Centre-pivot. VELUX roof terrace VELUX Window Centre-pivot. Sloping and vertical roof windows. Top-hung roof windows are the perfect choice for loft conversions with roof windows in easy reach. Roof window overview. NEW Low Pitch roof window; NEW 3-in-1 roof window. Top-hung roof windows are the perfect choice for loft conversions with roof windows in easy reach. Dormer. Window Operated with an elegant handle at the bottom, VELUX top-hung roof windows give you a full, open view of your skyline and maximise the amount of natural daylight that can be allowed in. Roof window replacement. blinds and shutters give the convenience of remote operation. Price calculator. VELUX INTEGRA electric top-hung roof window. 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Window Condell Ltd Specialist Building Materials and Supplies Condell Where to buy VELUX VELUX INTEGRA electric and solar. VELUX VELUX Keylite Roof Windows. The major difference here is the number of operable sashes that slide upwards and downwards for ventilation. NEW Low Pitch roof window; NEW 3-in-1 roof window. Top-hung roof windows are the perfect choice for loft conversions with roof windows in easy reach. Top-hung roof windows are the perfect choice for loft conversions with roof windows in easy reach. Space Makers; VELUX CABRIO balcony. Window