Know what you want? Try our 'Supplier Directory' 

BSRIA North offers louvre specification solution

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.

June Davis.

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:

  • How to understand weather louvre requirements;
  • How to minimise whole-life costs through system design and louvre selection;
  • Which terms to use to ensure that performance data are consistently stated when sourcing products from suppliers;
  • How to minimise risks associated with overstated performance claims.

Performance testing

The standard performance tests are described in:

  • BS EN 13030:2001 Ventilation for Buildings – Terminals – Performance testing of louvres subjected to simulated rain
  • BS EN 13181:2001 Ventilation for Buildings – Terminals – Performance testing of louvres subject to simulated sand

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:

  • Understanding of the required volume flow rate, louvre face area and subsequent face velocity;
  • Understanding of the permissible water penetration for the application, based on the classes provided by the standard test (A-D);
  • Understanding of the standard test classes for discharge or entry loss coefficient (1-4) and that a higher coefficient means lower energy usage.

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.”

4 July 2019

Comments

Already Registered?
Login
Not Yet Registered?
Register

Midea becomes fastest growing manufacturer of aircon products supplied into the UK

In 2017 Midea, the world’s largest air conditioning manufacturer, had achieved over 20% market share in Europe. Establishing further growth was never going to be easy, especially in countries where the status quo had remained relatively unchanged....

  28-Feb-2020

KoolDuct shows lasting power of innovation at STEM learning

Over 13 years since it was first installed, ductwork fabricated from The Kingspan KoolDuct System is maintaining ideal learning conditions at the National STEM Learning Centre at the University of York....

  28-Feb-2020

Building Dryer from Humidity Solutions

Our purpose-built, mobile refrigerant dehumidifier for use in factories, construction, storage and restoration and disaster recovery is IN STOCK NOW and can be delivered immediately.
  03-Dec-2019
Heating & Ventilating Review is the number one magazine in the HVAR industry. Don’t miss out, subscribe today!
Subcribe to HVR

Diary

FETA Annual Lunch