The SlimlineTM Window System

Suitable for narrow frame applications

Featuring modern architectural lines, the Slimline Altair Louvre Window System has been developed to suit narrow frame applications and installation into concrete block construction when screening is not required. The Slimline Window System can effectively bring natural light and ventilation into the building to reduce the need for power-hungry artificial cooling systems.

Slimline Single Louvre Bay

A single louvre window bay contained within a single frame.

Slimline Window System Dimensions


Slimline Louvre Window
SL2 Mullions

Slimline Standard Heights

While Altair Louvre Windows can be manufactured in any size specified, the wind and water rating for the building project will affect the maximum allowable window height and bay width. Please refer to the Altair Product Performance Warranty for technical information.

For standard heights in the Breezway Slimline Frame please see the size chart to the right. Off Standard heights are available but this will add cost and result in a fixed louvre blade to act as a filler piece.

Please note:

  • Standard Heights are measured from the lowest visible metal to the uppermost visible metal of the frame and excludes fins.
  • Off Standard Heights that are more than 5mm greater than or less than a Standard Height will have a top fixed blade to achieve the specified height. Off Standard heights that are within 5mm of a Standard Height will not have a fixed top blade.
  • Slimline windows with multiple bays and heights of over 10 and 16 blades respectively for 152mm and 102mm Galleries will require Heavy Duty Mullions.
  • Slimline Window Systems with Fixed Galleries consist of 152mm clips and blades spaced as far apart as 102mm clips are spaced on normal galleries. Fixed galleries are permanently fixed with the blades at a 45 degree angle.
  • Slimline Window Systems with Fixed Galleries do not meet water penetration requirements.
  • Slimline Window Systems with Fixed Galleries are only available in standard heights.
  • Refer to the product performance warranty on possible height restrictions for different blade types.
  • Standard sizes will save money and improve lead times.

Slimline Widths

There are no standard Altair Louvre widths. The desired window width can be achieved through multiple louvre bays (maximum bay width is 4000mm). The bay width may be affected by Building code rules. Please discuss with your Breezway Dealer and builder.

No. of BladesStandard HeightStandard Height
152mm Blades102mm Blades
14 Ext2100-
16 Ext2400-
22 Ext-2100

View/download Slimline Standard Height Chartsmall-pdf4

Technical Drawings

Blade Formulas

For allowable length of blades refer to Breezway Louvre Window’s Product Performance Warranty.

Breezway Slimline Window System
Actual Height / Standard HeightDim. A
Dim. B Overall HeightDim. A + 40mm
Frame widthDim. C
Slimline Frame: Glass & aluminium blade lengthDim. C - 77mm

Extension Blade Formulas

Extension Blade Formulas Slimline Frame
Glass & Aluminium Bladesx = Channel extension +20mm

Note: Flatness tolerance of +/- 0.35mm per metre.

View/download Slimline Blade FormulasSlimline Blades

Installation Instructions

Technical Papers

An Industry Guide to the correct Fixing of Windows & Doors

Fixing of Windows & Doorssmall-pdf4

An Industry Guide to the correct Installation of Windows & Doors

Installation of Windows & Doorssmall-pdf4

Installation Instructional Videos

The Australian Window Association (AWA) has prepared an industry guide on the correct installation of Windows & Doors in different types of construction. You can view the complete range of typical methods used via the AWA YouTube channel or please view the videos below.


Altair Louvre Window Recommended Specifications

A tight specification will help to make sure that what you specify ends up in your building thereby achieving your design objectives.

The louvre windows shall be Breezway Altair Louvre Windows

Unique features:

  • Drainage channels for superior water performance.
  • ‘Living Hinge’ design that pulls the clips tightly against the channel when closed for superior water performance and air infiltration.
  • Passed testing to 40,000 open/close cycles for long operational life.
  • Altair Louvres have passed AS2047 testing at 3,000mm high.

The louvre windows shall be Breezway Altair Powerlouvre Windows

Unique features:

  • Drainage channels for superior water performance.
  • ‘Living Hinge’ design that pulls the clips tightly against the channel when closed for superior water performance and air infiltration.
  • Motors are concealed within the head of the window frame.
  • Motors are easily accessible for maintenance.
  • Each low voltage motor only requires 0.25 amps to reduce transformer and wiring requirements.
  • Motors can be powered by appropriately specified transformers from any supplier.
  • Controlled by touch sensitive Apptivate Control Units and the Powerlouvre App, enabling automatic operation in response to timer events or an in-built temperature sensor.

View/download Altair Louvre Window Specificationssmall-pdf4