bigAir® Facade



PlusPoints that offer real value

A versatile choice

Our bigAir® louvre windows are system-independent. They can be installed in any stick-system assembly, wall reveals and timberwork structures. They are ideal for ventilating halls or other spaces and for use as large-area NSHEV units. 

From indoor pool to high-rise

The potential applications are virtually unlimited. 

  • Indoor and adventure pools (motor with IP 67 rating)
  • Indoor tropical gardens (motor with IP 67 rating)
  • Towers and high-rise buildings
  • Administrative facilities
  • Public buildings and facilities
  • Industrial and factory sheds
  • Schools and universities
  • Festival halls, sports and multi-purpose venues
  • Hospitals and clinics
  • Churches
  • Hotels
  • Residential buildings and conservatories 


Ready-assembled delivery

To allow prompt and trouble-free installation, we supply the windows as fully pre-assembled units complete with glazing. This allows straightforward fitting of our facade louvre windows – in much the same way as fixed lights – with no time lost through fine adjustment of hardware etc.

A full panoply of blades

Our bigAir® louvre units are manufactured, to your specifications, with

  • Single glazing
  • Double glazing
  • Triple glazing
  • Solar-control glazing
  • Insulated sheet-metal panels
  • Non-insulated sheet-metal panels 

Filigree appearance

All blades are arranged in a filigree, structural-glazing-like composition, without horizontal frame members, and close flush at the sides with the adjoining glazing. 

Quick and simple to replace

The intelligent, patented bayonet fastener system allows the prompt and straightforward replacement of damaged blades by any trade contractor.  

From big to small

As a general rule, our louvre windows are manufactured in minimum heights of 340 mm. The maximum width currently runs to around 5,900 mm and the maximum height to some 6,000 mm.

Size parameters

The achievable production sizes depend on the

  • surface area of the window
  • width-to-height ratio
  • section thicknesses 

Made-to-measure advice

We should be glad to counsel you on the optimum window sizes for your particular scheme. With all due regard, of course, to your specific requirements and preferences. After all, our ultimate goal is to find the most economical solution for you and your project. 

Top pivots tilt the balance in our favour

For all Lacker louvre windows, the pivot is located in the upper part of the blade assembly. This allows the provision of two offset weatherstrips to ensure an absolutely weathertight barrier.

Continuous tilt up to 90°

The blades can be tilted at any angle up to 90°. The maximum opening angle is freely selectable. As standard, this value is preset to 85°.


The opening action of the window is such that the blades tilt outwards, with the edge of the top louvre moving away to the inside from the front edge of the weatherstrip. The system design is such that no part of the blades encroach on the internal space in either the open or closed position.

Hardwearing hardware

The hardware and motors for our bigAir® louvre windows are self-locking and remain weathertight even in the event of mains failure. This absolutely fail-safe, airtight hardware technology obviates the need for the separate locking mechanisms required by "soft" fastening systems.

Integral protection

Internally mounted bird or insect screens and safety rails can be readily integrated in the frame section of the louvre window.


Filigree sections

For our frames, we exclusively use highly insulating, thermally broken multi-chambered sections with 24 mm adapter thickness. The sections can be adjusted to fit all standard stick-system assemblies and steel sections. Packing for greater adapter thicknesses and the widening of the adapter edge are feasible.

Every millimetre counts

Only filigree sections feature in Lacker's products. Depending on window size and structural requirements, the face widths generally range from 40 mm to 50 mm and the installation depths from 103 mm to 168 mm. For small louvre windows, we even use sections with face widths of only 35 mm and installation depths of only 65 mm.

All colours of the rainbow

The frame sections are only visible from the inside and can be anodized or coated in any required RAL or DB colour.

Durably weathertight

All weatherstripping is made from ageing- and weather-resistant silicone or EPDM, with double-blade seal. Unlike standard brush seals, the weatherstripping materials and design guarantee full and reliable weather exclusion even after years of service.   


Driven by ingenuity

We use state-of-the-art single-motor (230 V and 24 V) technology with intelligent controls that makes synchronization problems a thing of the past. This solution also significantly reduces current consumption, failure risks and the cross-sections needed for the power supply cables.

Intelligent motor

Protection is enhanced through vandal-proof installation of the motor and drive system in the frame section. The window's present (open/closed) position status can, depending on the system, be signalled by the motor.

Connections included

The wiring for industrial communications networks (bus systems) or the central NSHEV station is integrated in the window and carried within the assembly to a single connection point.

Cables made to measure

As an optional extra, we supply our windows complete with cabling. Cable lengths vary from window to window and are adapted by us to meet project-specific requirements.

100% waterproof

For indoor swimming pools and other damp or humid spaces, we install our watertight drive system with IP 67 rating. This offers exactly the same functions and benefits as our standard drives.

Certified excellence

In all tests conducted by independent institutes, our bigAir® facade louvre windows exclusively deliver top results:

  • NSHEV test to DIN EN 12101-2:
    Maximum height 6,000 mm – maximum width 4,895 mm
  • Air permeability to DIN EN 12207:
    Up to Class 4 (product-dependent)
  • Driving rain resistance to DIN EN 12208:
    Up to Class E 1650 (product-dependent)
  • Resistance to wind load to DIN EN 12210:
    Up to CE 2.667 for positive pressure and
    up to 5.333 for suction (product-dependent)
  • Thermal transmittance:
    Up to UW 1.1 (depending on size and glazing)
  • Resistance to repeated opening and closing
    to DIN EN 1191:2000-08:
    Up to Class C (= over 33,000 cycles) 
  • Ball impact resistance to DIN EN 18032-3:1997 04:
    Test passed without damage

Optional extras

Anti-trap function

The use of radar and movement detectors is possible, depending on the local conditions and occupancy. Clearly defined factors governing their application include the need for additional control cabinets and separate power supply cables, potential "blind spots" and the possibility of inadvertent interruption in non-critical cases. 

Safety Class 4 applications to VFF (German Association of Window and Facade Manufacturers) data sheet: Lacker prefers in-built systems using Mayser safety edge contact strips. This obviates the need for additional power supply cables, on-site fine-tuning and cumbersome external control cabinets. 

Safety Class 2 and 3 applications to VFF data sheet: For applications subject to only a small risk of accident, Lacker recommends an acoustic or visual warning signal, or a reduction of the closing speed.

Position status monitoring   

The (open/closed) position status of bigAir® louvre windows can be monitored using reed switches or an incremental encoder system.

Vapourproof and watertight drives

bigAir® louvre windows can be fitted with IP 67-rated electric motors to allow their use in indoor swimming pools, tropical gardens and other damp or humid spaces. 

Insect and bird screens    

The outward-tilting blades of the louvre windows allow bird and insect screen systems to be readily fixed to the frame in the interior.    

Guard rails

To protect against falling, elegantly styled stainless-steel bar guard rails can be mounted internally.


Lacker Taifun four-point locking system

The Lacker Taifun – a special electromechanically controlled, hardware-independent four-point locking system – was purpose-designed for extreme applications in towers and high-rise buildings. It keeps windows absolutely weathertight, even under the severest wind loads of up to +4,000 Pa and -8,000 Pa. We are not aware of any other opening light worldwide that is able to withstand extreme storm conditions on this scale.

Lacker emergency opening/closing system

Our manual emergency opening/closing system allows the operation of windows even in the event of mains failure.

Lifting lugs for crane assembly

We also strive to make our window systems fast and easy to install. Our window units are therefore supplied with lifting lugs for crane assembly upon request.