By Janine Hughes


A louver is made up of slats. These vertical or horizontal slats allow air and sunlight in but they are angled to keep out rain, direct sunlight and noise. Fixed louvers are those with the slats permanently set at a specific angle. They are extremely versatile and can address issues such privacy, severe weather, shading, security while being aesthetically pleasing at the same time.

There are many different designs available. Shapes and sizes of blades differ and even the spaces between blades vary from product to product. Blades are made of different materials and the finishes used are also different. Choice is based primarily on where the product is to be used. For example, certain products are specially designed for use in situations with severe weather conditions.

Aluminum has the advantage of having a high tensile strength, is resistant to heat and cold and it does not corrode easily. A number of different options are available when it comes to finishes. A powder coated color finish or an anodized finish are two options.

A louver can be manufactured in virtually any size or shape to meet the design requirements of a particular building. Industrial applications are common such as in power plants where natural ventilation and temperature control are vital. Sometimes they may even be integrated between double glazing as they help to limit glare and diffuse light. These products are also used very effectively in office buildings and in homes.

It is important to buy these products from respected suppliers. If buying from an online supplier, check out how much experience the manufacturer has had in making these products. It is possible to read customer reviews to find out how other people have experienced their service. They need to test designs accurately and establish exactly how well their designs function. Data has to be collected with regard to penetration of water, air flow resistance and free area.

A high percentage free area means that the most air possible flows through the smallest opening. How much water is able to penetrate obviously has to be taken into account as well. Air flow is affected by various factors such as the shape, size and angle of the blades. Each product has a slight difference when it comes to air flow resistance. The best manufacturers use the data they collect when testing to ensure that their products are as efficient as possible.

Clients may be given the opportunity to customize products. They may be able to choose the size and shape of blades or a particular finish. They may also be able to order extras to be fitted such as galvanized mesh. There are products that already come with gutters fitted in front of blades directing water away from the opening of the building.

A louver is not normally seen as a primary design element but is rather valued for its practicality. However, some architects do use them to create aesthetically pleasing effects on the facades of buildings. The variety of models, sizes, and paint finishes available, means that unusual and appealing features can be created internally and externally. Apart from aesthetic considerations, the benefits of increased air flow amongst many others makes these products invaluable.




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