When it comes to the efficient operation of a building, even the seemingly small decisions can have a big consequence. For example, what elements must be considered when specifying a louvre? BSRIA North’s louvre-testing facility offers a solution.
A louvre is a passive device, essentially a grille fixed over an opening, designed to let air through and keep water or sand out. It is designed to perform both these functions concurrently and its suitability for a specific application is established by how effectively it achieves these functions in combination.
June Davis, business manager for BSRIA North, says: “Louvres are big business and BSRIA can offer many hints and tips. Failure to understand and clearly express the performance requirement at the design or procurement stage increases the risk of the product not being fit for purpose. The end user may experience unwanted water penetration or wasted energy. This certainly isn’t a green approach and, just as crucially for BSRIA members, does it save money?”
To achieve optimum performance, Ms Davis explains that system designers and specifiers of louvres must have an appreciation of:
The standard performance tests are described in:
Ms Davis adds: “The test methods are designed to simulate real-life operating conditions the louvre will undergo when installed. The rejection performance can be established for a range of ventilation rates while subjected to wind-blown rain or sand.
“BSRIA operates a specialist louvre test facility, which offers members and clients independent performance testing of sand and weather louvres to these standards.
“It’s a unique operation and facility. We are often asked questions about louvre design and, specifically, how to improve the louvre’s performance.”
Specifying a weather louvre
Ms Davis advises that specifying a weather louvre usually requires the following elements:
Ms Davis concludes: “It must, however, be mentioned that other factors can affect the running and performance of a louvre which are not accounted for by the standard test. Where possible, we can try to meet these needs.”
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