Breezway IGLU® System

Double Glazed Louvre

The revolutionary Altair® IGLU® Double Glazed Louvre System is designed to allow maximum ventilation through the window opening while providing high thermal performance for residential or commercial designs.

PROJECT – Breezway

Maximum Ventilation

90% ventilation* through the window opening to capture breezes no matter the wind direction.

Thermal Protection

Offers increased energy efficiency and excellent thermal ratings making it well suited to extreme climates.


Incorporates the Stronghold® System to ensure compliance with Fall Prevention requirements.

IGLU Compliant


Wide range of customising options including automated operation, handle types, colour options and security.

IGLU Customisable

*90% ventilation as per the NCC Definition of a ventilation opening. Using a more conservative and realistic definition of the ventilation opening, the thicker IGLU blades will reduce the ventilation opening to approximately 80% of the total window area.

Design for Comfort

Maximum Ventilation
Natural ventilation is important in any home or working environment. It helps keep the air we breathe clean and fresh whilst maintaining a connection with our outdoor environment. The unique design of the Altair IGLU Double Glazed Louvre opens twice as wide as other window types to offer maximum ventilation to naturally cool a living or working space without the need for artificial air conditioning systems.

High Energy Performance
The 22mm IGLU Blade, compromising of 5mm Low E glazing, 12mm Argon Gas filled spacer, and another layer of 5mm Low E offers the highest thermal performance of any residential louvre. This double glazed louvre is ideal for use in colder climates, or anywhere where higher levels of thermal insulation are required.

Elegantly Robust Clip
The IGLU Clip utilises the Breezway Stronghold System, granting superior blade retention with all the other benefits the Stronghold System offers. The stepped nature of the IGLU Blade allows for the internal glazing layer to be retained within the clip, while the outer glazing layer finishes flush with the clip. This allows for a completely flat aesthetic to the outside of the window.

Frameless Glazing
Breezway Altair IGLU Blades do not have thermally compromising aluminium framing. Instead, the blades are capped top and bottom by rubber blade-to-blade seals, embedded into the insulated glazing unit (IGU) sealant, with a clean ceramic print running the perimeter of each blade to conceal the IGU spacer, while still drawing the eye through to the view outside.

IGLU Video Presentation

IGLU® System 3D Models

The models shown below are rendered animations only. For more technical detail please view the CAD and BIM model section below. Viewing may not be possible on some older computers. We recommend Google Chrome for the best viewing results.
NOTE: Whenever you see this symbol logo-mark-25x25 click on an illustration to view a 3D interactive version. Rotate the model by using your left mouse button or pan the model by using your right mouse button. Use your mouse wheel to zoom. Please note this is a rendered model only. For more technical detail please see the CAD and BIM Model section below.
1 Bay Manual Open
IGLU Easyscreen Manual Open

1 Bay Powerlouvre Open

IGLU Easyscreen Power Open

2 Bay Louvre/Fixed

IGLU Easyscreen Manual FL

3 Bay Louvre/Fixed/Louvre

IGLU Easyscreen

1 Bay Commercial Frame

IGLU Component Commercial Frame
IGLU Unassembled Gallery

Performance Data

AS 2047 Wind and Water Performance Testing

  • 220Pa Water Penetration Resistance and 5,000Pa Ultimate Limit State Wind Pressure
    at 1916mm high x 1208mm wide in an Easyscreen Frame.
  • 300Pa Water Penetration Resistance and 5,000Pa Ultimate Limit State Wind Pressure
    at 2476mm high x 581mm wide in an Easyscreen Frame.
  • 450Pa Water Penetration Resistance and 5,000Pa Ultimate Limit State Wind Pressure
    at 1595mm high x 551mm wide in Altair Components.
  • 280Pa Water Penetration Resistance and 8000Pa Ultimate Limit State Wind Pressure
    at 3036mm high x 581mm wide in an Easyscreen Frame.

Acoustic Testing
The IGLU System has achieved a major improvement on our single glazed Altair Louvre Window, of Rw30.

Bushfire Testing
The IGLU System is the only double glazed louvre window to pass BAL-40 testing. The window passed testing in our Breezway Easyscreen Frame with Invisi-Gard screens. For more information view our Bushfire Ratings.

WERS Ratings
The WERS ratings of the Breezway Altair IGLU Louvre in an Easyscreen Window System has been audited and achieves an 18% U-value improvement on the Single Glazed Altair Louvre with Low E Glass in an Easyscreen Frame and a 23% improvement on the Single Glazed Altair Louvre in a Timber Frame.

U-Value Performance Table
(Lower values are better)
 Altair® Louvres with IGLU® Double Glazed BladesAltair® Louvres with 6mm Clear Low E Glass BladesAltair® Louvres with 6mm Clear Glass Blades
Easyscreen System3.64.46.2
Easyscreen System with ScreenTBC3.64.6
Altair® Louvre Galleries in Timber Framing2.63.44.9
Acoustic Testing Table

Blade MaterialRw (C,Ctr)
Single Glazed Altair® Louvres in an Easyscreen™ FrameRw28 (0 C; -1 Ctr)
Double Glazed Altair® IGLU® Louvres in an Easyscreen™ FrameRw30 (-1 C; -3 Ctr)

Product Offer

  • 5mm Low-e toughened glass / 12mm Argon Gas filled spacer /5mm Low-e toughened glass
  • Available with the Altair Easyscreen Window System or the Altair Component System for installation into compatible frames.
  • Standard heights only.
  • Standard blade lengths are stocked, with custom blade lengths available on special order.
  • Wide range of customising options including: automated operation by the Powerlouvre System; handle types; handle and clip colours; security.
  • Includes the Stronghold System.
  • Available with fixed lite thicknesses of 18mm, 20mm and 24mm in Easyscreen Window Systems.

To learn more about using Altair Louvres to Meet Fall Prevention Through Openable Window Requirements please visit the Fall Prevention Compliance page.

If blades need to be removed from Altair IGLU Clips or if broken blades need to be replaced, the pins must be removed. The removal process requires tools and will destroy the pins so new pins will be required when blades are re-installed.
Breezway Altair® IGLU® System Standard Heights
No. of BladesEasyscreen Window SystemIGLU Galleries with Weatherstrip*IGLU Powerlouvre Galleries with Weatherstrip**
All dimensions are in millimetres (mm)
For mobile devices: Use your finger to scroll table horizontally.
* To calculate the gallery height only, deduct 10mm.
** To calculate the gallery height only, deduct 40mm.
Breezway Altair® Easyscreen Window System Frame Widths with IGLU® Standard Blade Lengths
No. of Bays300mm** Blade Length500mm Blade Length800mm Blade Length1127mm Blade Length
All dimensions are in millimetres (mm)
For mobile devices: Use your finger to scroll table horizontally.
NB: Widths not shown in the table can be achieved via coupling or via manipulation of fixed lite bay widths.

* Frame widths greater than 4,000mm are only available in Custom Black, CAA, Pearl White Gloss, or by special order.
**300mm blade length is not available with the Powerlouvre System.

IGLU brochure
Breezway IGLU System Brochure.
View PDF.