How do louvres work

Since our objective is to get more air through the louver, we might assume that Louver 2 is better than Louver 1, since it has a higher free area. However, more evaluation is required. The real question is, "How much total air can I get through the louver without entraining water? The total square feet of free area is 7. The tested First Point of Water Penetration for this louver is feet per minute free area velocity. We can now determine how much air can safely be run through the louver by multiplying the louver free area by the design velocity 7.

The resulting Volume of Air for Louver 1 is cfm. Louver 1 is a better choice - IF we can live with the pressure drop from the higher airflow rates! Most Manufacturers publish air flow resistance for their louvers. Each louver will have slightly different resistance based on the blade and frame shapes and angles.

These characteristic can be expressed by a formula and graphed, such as:. However, if you have the data, use it! Here we can calculate the resistance at the design velocities for each louver and determine that:.

Both of these values should be acceptable for HVAC system design, and would mean that our Louver 1 is the better choice, even though the free area is lower. If you plan to use Louvre Windows instead of an air conditioning system, the schedule of each construction project will be more manageable, since one trade is completely omitted.

Standing in front of a building with natural ventilation you can hear everything, but not the ventilation. Neither humming air conditioning on the roof nor in a hidden place next to the building. No pipes or ventilation grilles interfere with visual aesthetics. You see nothing and hear nothing - not from outside and not from inside - and that's good. Hardly anyone suspects that the design subject "window" is still working in a side job. What you see is the sophisticated louvre blade construction, either with framed aluminium blades or in Allglass look and you can be pleased about the great building design.

Integrated into fixed glass surfaces or as a window strip in masonry constructions, Louvre Windows will provide honor to each building style. At a time when more and more attention is paid to the so-called "ecological footprint", the use of natural resources is indicated. Oxygen is available indefinitely. But is it really necessary to use energy to bring oxygen into a building?

Louvre Windows are smart and ecologically worthwhile. HAHN Lamellenfenster is a leader in development and production of natural ventilation systems since Due to the possibility of implementing individual design specifications apart from the standard dimensions, cooperation with architects and window builders results in unimaginative new variations. Vertical louvres, horizontal louvres, raked louvres - everything is possible.

The surfaces of the ultra-slim aluminum profiles can optionally be anodised or powder-coated. There are no limits to the design. The specialist consultants at HAHN Lamellenfenster guide architects, window constructors and clients through all phases of a project.

With many years of experience and technical expertise, they advise you during all processes and support you with exactly the information and data you need. At HAHN, individual wishes and tailor-made solutions are part of our everyday routine. And we look foward to every challenge. A Louvre is a ventilation product that allows air to pass through it whilst keeping out unwanted elements such as water, dirt and debris.

Depending on the type of ventilation you need, a selection of specially designed blades are mounted in a frame. Each blade and blade configuration is different and allows different things to pass through it or over it. For example, blades may allow air through, but not rain or sand. Louvre systems are included on most building types to provide airflow both intake and exhause to the building services system and to provide weatherability against rain ingress.

Architectural louvre systems can also be used for simple screening on buildings and provide an aesthetic and economical solution for this requirement.

Whilst a plant room containing special machinery or electrical equipment may still need high levels of ventilation with maximum protection from water entry, in which case a performance louvre would be the best option. CS have been manufacturing and selling louvres globally for over 60 years. When you choose our louvre panels, you get the support of a dedicated team with a wealth of experience and design capability.

The performance of our louvre systems has been evaluated by independent third party testing. In addition, any of our standard or bespoke solutions can be verified in our own testing chamber to ensure they achieve specified performance levels in real world conditions. This website uses cookies to help us give you the best experience when you visit our website. They can be installed horizontally or vertically, custom-shaped, and even finished in a variety of ways. Varying blade depths, and variable blade frequencies as well as a staggered placement of the blades can also play a role in creative design of louvers.

Here at AWV, we have developed a range of louvers to meet the complex needs of modern architecture, ensuring superior ventilation and protection at the same time. Our louver line-up offers an array of weather protection capabilities, styles, and blade profiles to suit all the requirements of your project. These louvers are designed to ensure that all of your performance needs are met.

If you have any further questions, you can always get in touch with us for further advice and guidance about the product. Growing minds need healthy spaces in which to learn. From ventilating the building with fresh air, to reducing glare, our architectural products help students stay focused.

What are Architectural Louvers for? However, louvers have many uses for both engineers and architects. When are Louvers Required?