The RedLine Ventilation Tile is a means of providing roof space ventilation with minimal visual impact. It is ideal for use where alternative eaves and ridge ventilation systems are not appropriate and can also be used for mechanical extraction and soil pipe ventilation. Performance Minimum pitch is the minimum pitch of the tile or slate Maximum pitch 90° Fully wind tunnel tested for compatibility, weathertightness and durability The effective ventilation area for each unit is 6,000 mm² (DuoPlain - 7,850 mm²) To achieve roof space ventilation of 5,000 mm²/m, RedLine Vent Tiles should be spaced at 1200 mm centres. To achieve 10,000 mm²/m, space at 600 mm centres For DuoPlain, space at 1.57 m centres to achieve 5,000 mm²/m and 0.78 m centres for 10,000 mm²/m The components of the RedLine Ventilation Tile comply with the BS 5520: 2011, BS 5534: 2014 and BS 5572: 2000.