Venetian blinds become common and famous things to the people around the world. Why, because like we know before that the window is used as ventilation. In this case, it can help the people to ventilate the air from the inside of a room with the fresh or natural air from the outside or surroundings. Beside it, the people use it because they want to keep their rooms or house clean in every time. So, later they can live or work comfortably. But, unfortunately, the Venetian Blinds also have a few of disadvantage for the people.
Actually, the disadvantage of the Venetian blind is occurring in the view of surroundings. In the other words, the people are inside the room or the house cannot see the condition and situation of the outside or surroundings. In some cases, this condition happens when the Venetian blind is opened. It means that the Venetian blinds will close the surface of window when it is opened. And the people cannot see the surroundings. Meanwhile, when the Venetian blind is closed, the people inside a room or house can easily see the condition of surroundings. But, the consequence is the foul or dirty air can enter to the room easily, too. And the effect is the people also cannot get the fresh air well. If we look at that condition, we can conclude that we should close the Venetian Blind just in the morning and in the night when the world is full with fresh air. And we must open the Venetian Blind when the world is full with dirty air at noon.