Spur® Double Stage
Overview
Spur® Double Stage Louvres are commonly selected for buildings that require greater levels of rain defence where plant and equipment areas require high levels of watertightness. Arcadia's range of tested performance Louvres are engineered and tested to AS 4740:2000 and provide engineers and designers a guaranteed performance result. There are a broad range of Louvre profiles available including drainable louvre systems to meet differing project requirements for pressure drop and rain defence. In addition this louvre range provides a high level of privacy and screening for mechanical plant and equipment.
Class 1 1 - CD = 0.7 and aboveClass 2 2 - CD = 0.5 to 0.699
Class 3 3 - CD = 0.3 to 0.499
Class 4 4 - CD = 0.1 to 0.299
Class A A - 1 to 0.99% EffectivenessClass B B - 0.989 to 0.95% Effectiveness
Class C C - 0.949 to 0.80% Effectiveness
Class D D - Below 0.80% Effectiveness
Class 1 1 - CD = 0.7 and aboveClass 2 2 - CD = 0.5 to 0.699
Class 3 3 - CD = 0.3 to 0.499
Class 4 4 - CD = 0.1 to 0.299
Class A A - 1 to 0.99% EffectivenessClass B B - 0.989 to 0.95% Effectiveness
Class C C - 0.949 to 0.80% Effectiveness
Class D D - Below 0.80% Effectiveness
Class 1 1 - CD = 0.7 and aboveClass 2 2 - CD = 0.5 to 0.699
Class 3 3 - CD = 0.3 to 0.499
Class 4 4 - CD = 0.1 to 0.299
Class A A - 1 to 0.99% EffectivenessClass B B - 0.989 to 0.95% Effectiveness
Class C C - 0.949 to 0.80% Effectiveness
Class D D - Below 0.80% Effectiveness
Features
Propelling High Performing Louvre Designs to Meet HVAC and Engineering Needs
Specifying weather louvres can be challenging, and if you don’t take into account all of the relevant considerations, you risk selecting the incorrect louvres for your project. Check out our whitepaper our educational whitepaper to help guide you draft an effective louvre specification.
Using a Testified and Certified Louvre System
The Australian Standard AS4740 sets out the requirements of testing of louvre systems. This testing is conducted in a testing rig and provides industries standards for airflow performance and rain defence. An untested and uncertified louvre system can result in poor airflow performance and impact on personnel wellbeing. The Spur® Fixed Louvre Systems have been exhaustively tested and certified using Australian Standards AS 4740.
Airflow Performance
Louvre airflow performance is affected by a range of physical elements including the louvre blade configuration, the louvre depth, the quantity of passes (single, double, triple stages), the louvre blade shape and any protrusions that interfere with the free flow of the air or that cause turbulence. Increased air velocity may cause varying areas of turbulence and flow disturbance which affect the louvre performance.
Providing Rain Defence
Rain defence performance of a louvre is tested with a 13m/s constant velocity of wind perpendicular to the louvre face and 75mm/h simulated rain droplets infused into the airflow for a period of 30 to 60 minutes. Intake velocities are altered throughout the test from 0.5m/s to 3.5m/s. Water ingress is measured at the internal of the louvres to provide a louvre rain defence result.
Factors to Consider
Severity of local (site) weather conditions, Location and exposure of louvres on building, Airflow rate and direction through louvre, Maximum allowable water penetration, Maximum acceptable pressure drop , Relevant performance data (site requirements), Special solutions for sloping applications and Building Aesthetics
Applications
