Fakro Side Hung Egress FWU window is designed for rooms where building codes require two methods of egress (escape). We recommend that you install Fakro side-hinged skylights for use as egress roof windows for your safety and so that the building department will give you approval. The egress window is available in two versions, right opening FWU-R or left opening FWU-L. FWU egress windows do not only provide extra escape way, but also are excellent means of providing extra light, and fresh air to the room. FWU size 24/46 window is officially recognized as egress window (see report), and can help safe lifes in case of emergency situations like fire.