Rationel AURAPLUS design is sleek, elegant and creates a beautiful architectural appearance, whether you're building from new or refurbishing. The narrow design ensures that a maximum amount of daylight is let into the building. The slim and well-insulated construction makes it possible to let in more solar heat during winter, than it lets out. This means a much lower heating bill during the heating season and significant CO2 savings. Moreover, it improves the indoor climate both for comfort health by minimizing drafts and cold spots. There is extra security built into Rationel AURAPLUS windows which makes life difficult for the burglar. There are several locking points around the sash/frame construction. The windows and doors are also secured with reinforced fittings as standard and espagnolettes with three locking points. The Family ”Rationel AURAPLUS Tilt_turn_inward” consist of 1 type of door with 9 predefined sizes, associated information about fire escape and values to be used in energy calculation. Tilt & Turn doors function in two ways. For ventilation the door is tilted in at the top. To open, the sash is Side hung and opens inwards.