When it comes to ventilation , there is nothing as effective as open windows and doors. Moreover, open windows and doors only makes sense if the outside temperatures are comfortable and if the openings are protected by nets.
No doors and windows in most regions are an open invitation to flies, mosquitoes and other pests.
In areas where winters are severe, screens or nets are usually kept in the cold season.
Current trends indicate that the window blinds have a wooden or aluminum frame, it adjusts the screen fabric, usually made ??of aluminum or fiberglass that is stretched across the frame for proper fit. While the new screens can be barely noticeable, those dirty spoil the whole vision of the place, taking into account the details of periodic cleaning of them.