Factors to Take Into Account When Choosing Exterior Louvers
If you want to leave the windows open to facilitate the entry of fresh air from outside that is free of dirt, dust or any other debris, first you should have exterior louvers. An exterior louver comprises of from containing a number of blades, which may remain fixed or be movable. When it comes to deciding the installation of louvers, what factors should you take into account? Whether louvers are required for any commercial or residential property. Below is how these factors affect the choice of louvers:
Free Area: For making an assessment of the free area, you need to take the entire open area available for the louver into consideration. To arrive at the figure, you need to subtract the area taken by all the likely obstructions, including the frame and the actual blades, and divide that by the total area of the opening in that wall. Usually, the ratio of louver free area to wall opening is 35% to 60%. As you can guess, the higher this percentage, the more is the amount of air entering through the window, and the lower the expense of the louver and the opening will be.
The obstruction: You need to have some obstruction for keeping the unnecessary water out. When an opening is totally obstructed, no water can enter, and when the opening is totally unobstructed, water will enter freely. So, to get a maximum free area, the louver should be designed in a manner, yet allowing a minimum quantity of water to come in the room.
Water penetration: We need to know the velocity of the air entering the room in order to calculate the amount of water that may enter through a louver. The spot on the louver from which water enters is the spot for the penetration of water. An appropriately designed louver will take into account water penetration.
Resistance to the flow of air: Any obstacle in the flow of air will offer a resistance. The re are a lot of obstacles in the path of air flow including coils, filters, ductwork, the composition of the building itself and many more. The tangible resistance offered by the louver is estimated by measuring the air running via the louver, and also the difference in the pressure level for an assortment of velocities at free areas.
Aerodynamics: Any louver is bound to offer some resistance, the amount of which depends on its casing and the contour of its blades. Blades having lower angles or better aerodynamic contours will offer a reduced resistance. When you want an accurate value of resistance offered to the air flow, it is imperative to calculate the velocity of free air. It is imperative to take resistance into account and keeps it to minimum level, as it may adversely affect other equipment causing the movement of air and the performance of the fans.
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