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Rain Defence Louvres

rain defence louvre
rain defence louvres 3
rain defence louvre 2

The main objective of Rain Defence Louvres is to allow the passage of air, whilst providing the area beyond the room with protection from rain penetration.

When specifying rain defence louvres we recommend comparing the airflow class and the level of rain defence provided by the louvre.

Our CS RS-5605 rain defence louvre offers the best combination of airflow, rain defence and spatial efficiency of any product on the market.

Why CS Rain Defence Louvres

  • industry leading performance characteristics
  • unparalleled global experience
  • worldwide technical support
  • first class innovation & designs
  • most spatially efficient models on the market
  • up to 100% rain defence with some models
  • robust blades up to 3x thicker than rolled blades
  • up to date, relevant test information

Calculate Your Louvre Pressure Drop

Louvre pressure drop is one of the key parameters of establishing the louvre requirements for your project as it’s based on the needs of the building and its ventilation system, rather than “free area” which doesn’t really mean anything.

Pressure drop is defined as the pressure differential from one side of a louvre to the opposite side, often expressed in Pascals (Pa). Louvre pressure drop occurs when frictional forces, caused by the resistance to flow, act on air moving through a louvre.

Increased louvre pressure drop can prevent equipment inside the ventilated area drawing sufficient air through the louvre, resulting in overheating, as the equipment has to work harder to draw the air through.

Send

Guidance

Air Density (ρ)
is generally 1.225 kg/m³ (at sea level)

Volumetric Flow (qv)
is supplied by the ventilation engineer and relates to the amount of air required through the system

Core Area (A)
The minimum height times the minimum width of the front opening in a louvre assembly with the louvre blades removed.

Discharge Loss Coefficient (CD)
See chosen louvre model testing information.

Calculate the Amount of Louvre You Need

Send

Discharge Loss Guidance

Louvre ModelPenetration ClassAirflow ClassDischarge Loss Coefficient
RSH-5700A up to 3.0m/s30.289
RSV-5700A up to 3.5m/s30.297
RS-5605A up to 3.5m/s10.466
A-3105D up to 3.5m/s20.391
A-4080C up to 1.0m/s20.38
A-4085C up to 1.0m/s20.38

RS-5605 Rain Defence

The RS-5605 offers the best combination of airflow, rain defence & spacial efficiency of any louvre in the market with Class A rain defence up to 3.5m/s and an airflow class of 1.

Orientation : Vertical
Mullion : Visible
Blade Spacing : 25mm
Depth : 131mm
DLC : 0.466
Airflow Class : 1

RSH-5700 Rain Defence

The RSH-5700 offers an excellent combination of airflow, rain defence and spacial efficiency with Class A rain defence up to 3 m/s and an airflow class of 2.

Orientation : Horizontal
Mullion : Visible
Blade Spacing : 51mm
Depth : 127mm
DLC : 0.320
Airflow Class : 2

RSV-5700 Rain Defence

RSV-5700 rain defence louvres are designed to stop wind-driven rain whilst still allowing efficient passage of air.

Orientation : Vertical
Mullion : Visible
Blade Spacing : 51mm
Depth : 127mm
DLC : 0.330
Airflow Class : 2

Louvres

2016 Louvre Brochure

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.

Download the brochure for:

  • Industry Leading Products
  • Innovative New Design Options
  • Detailed Technical Information
  • Louvre Specification Guidance

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Construction Specialties UK Ltd
1010 Westcott Venture Park
Westcott, Bucks, HP18 0XB
United Kingdom

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