They are available with equivalent areas of 4000 to 4600 mm2. In new buildings, where there are a limited number of positions for installing slot vents, the Xtra range will normally provide the necessary background ventilation to conform with Part F without having to consider larger and more costly options.
Xtra slot ventilators are all marked with their equivalent area to simplify selection. They can be fitted to timber, aluminium, uPVC or composite windows and are ideal for night ventilation without compromising security.
