Louvre windows
aesthetic and efficient
Louvre windows let light and fresh air into the building. In addition, with appropriate control, they can function within a SHEV system as natural smoke and heat exhaust devices or as supply air systems in the event of a fire. They also contribute significantly to the overall visual impression of the building. roda louvre windows integrate into the façade in such a way that they do not disturb it as a whole, but enhance it visually. We attach great importance to energy efficiency. With these systems, the specifications of the current Energy Performance of Buildings Directive (EnEV) can be significantly undercut. Low joint permeability coefficients and U-values of up to 0.5 W/m²K help to save energy.
functionality and safety
Opening type:
The roda louvre windows consist of one or more louvres, one above the other, which open as a pivot flap via a horizontal pivot axis. The part of the louvre below the pivot axis opens outwards, the part above opens inwards. The pivot axis is generally in the centre of the louvre height, but can also be shifted up to 1/3 – 2/3 if required (except type S200). Please refer to the EAL page for the opening type of the EAL louvre.
Fittings:
The fittings are made of corrosion-free material and are concealed.
Surfaces: The profiles are anodised, powder-coated or wet-painted according to RAL, NCS or DB. Special colours are possible.
Drive units:
- Manually via hand lever or connecting rod
- Electrically via 230 V AC | 24 V DC
- Pneumatic
Technical values (except type GG joint):
Tested in line with DIN EN 14351-1:2006+A1:2010
- Durability class 3 (DIN EN 1191)
Tested in line with DIN EN 12101-2:2003:
- Functional reliability RE 1000 (Annex C)
- Function under loads SL-0 (Annex D)
- Function at low temp. T-0 (Annex E)
- Heat resistance B 300 E (Annex G)
Installation:
The louvre windows are intended for installation in walls and vertical façades. Various clamping profiles are available for installation in mullion-and-transom constructions, window elements or masonry.
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Versions
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Louvre window AIRSTREAM
AVAILABLE SOON

The louvre window AIRSTREAM is a natural air supply device, which was developed on the one hand for the ventilation of industrial and administrative buildings and serves on the other hand as smoke extraction in case of fire. It can be controlled electrically with 24 V or 230 V or pneumatically. It is also very easy to maintain and install, as all components are easily accessible and can be replaced individually.
Slats:
A polycarbonate multi-skin sheets, up to 3-fold insulating glazing or sandwich glazing is possible. The slats are installed in a thermally separated aluminum frame for compliance with the GEG 2020.
- Slat height variable up to 300 mm
- Light transmission depends on the type of glazing
Seals:
- All-round outer frame with closed chambers
- EPDM seals ensure high air and water tightness
- Reliable drainage in the base area
General technical data:
- Windows tested according to EN 14351-1:2016-12 e.g. driving rain tightness and air permeability
- NSHEV tested according to EN 12101-2:20030-09 for pneumatic and electric actuators
- Fire behavior EN 13501-1: B,s1-d0 or EN 13501-1: A1
Possible Sizes:
- Maximum element height = 2100 mm
- Maximum element width = 1400 mm
S200

The S200 is an economical solution for industrial use as a supply air system, which is also designed to serve as a shading or privacy screening system. The frame is made of extruded aluminium profiles with a frame construction depth of 50 mm and a frame face width of 38 mm. The S200 is approved as a smoke and heat extraction system according to DIN EN12101-2:2003.
Louvre blades:
Slats are made of extruded aluminium profiles with a height of 200 mm.
The S-shaped slat profile allows a variant centre distance of 120 to 180 mm.
Thus, the frame height can be adjusted to requirements.
Technical specification tested as per DIN EN 12101-2:2003
- Aerodynamic: Cv = 0.55 – 0.57 (opening angle 78°)*
- Structural stability under wind load WL 3000
* subject to model and size
Possible Sizes:
- Minimum frame width = 300 mm
- Maximum frame width = 1800 mm
(broader elements are available divided by glazing bars)
TGL ISO
24 BT50 / 32 BT60 / 44 BT70

The TGL ISO is the thermally separated version of the NTL. Window and slat frames are made of thermally separated aluminium profiles with a frame construction depth of 50, 60 or 70 mm. The TGL ISO is approved as a natural smoke and heat extracting system according to DIN EN 12101-2:2003.
Louvre blades:
Choice of panel or insulating glazing up to 3-fold insulating glazing.
Total thickness of slats: BT50 – 24 mm, BT60 – 32 mm, BT70 – 44 mm.
BT50 variable slat height: 120 – 400 mm
BT60 / BT70 variable slat height: 200 – 400 mm
Sealings
- Lateral with sealing brushes
- Horizontal profile joints with sealing brushes and EPDM gasket
Technische Werte geprüft nach DIN EN 12101-2:2003:
- BT50 – Aerodynamic: Cv = 0,56 – 0,61 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,50 – 0,56 (opening angle 64°)*
- Structural stability under wind load WL 3000
- Function at low temperatures: T-20*
Technical specification tested as per DIN EN 14351-1:2006+A1:2010:
- Driving rain tightness according to DIN EN 12207:
- BT50 – classification 6A
- BT60 – classification 7A with additional sealing
- Joint permeability according to DIN EN 12208:
- BT50 – classification 3
- BT60 – classification 4 with additional sealing
- Wind resistance according to DIN EN 12210:
- BT50 – classification C2
- BT60 – classification C5 with additional sealing
Further technical specification:
- Airborne sound insulation according to DIN EN ISO 717-1:
BT50 – 38 dB*
BT60 – 39 dB* - Burglar resistance according to DIN EN 1627: BT60 – RC2 / BT70 – RC3
- Ball impact resistance according to DIN 18032-3: existing for the BT60
- Pendulum impact test with 900 Joule (fall proof) * subject to model and size
Technical values for TGL ISO 44 BT70 on request
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width = 2000 mm
(broader elements are available divided by glazing bars)
Maximum frame width can be extended to 2500 mm with tandem control or double-acting drive
TGL ISO SLP
38 BT50 / 48 BT60

The classy metal look of this highly insulating louvre window system results from its flush-fitting structural shape. Window frame and slats are made of thermally separated aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The TGL ISO SLP is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
Slats are made of thermally separated extruded aluminium profiles with heights of 174, 192, 200, 211, 275 or 344 mm (frame excluded).
Total thickness of slats: BT50 – 38 mm, BT60 – 48 mm.
Sealings:
- Lateral with sealing brushes
- Horizontal profile joints with sealing brushes and EPDM gasket
Technical specification tested as per DIN EN 12101-2:2003
- BT50 – Aerodynamic: Cv = 0,54 – 0,60 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,48 – 0,52 (opening angle 64°)*
- Structural stability under wind load WL 3000
- Function at low temperatures: T-20*
*subject to model and size
Technical specification tested as per DIN EN 14351-1:2006+A1:2010
- Driving rain tightness according to DIN EN 12207:
BT50 – classification 7A
BT60 – classification 7A - Joint permeability according to DIN EN 12208:
BT50 – classification 4
BT60 – classification 4 - Wind resistance according to DIN EN 12210:
BT50 – classification C5
BT60 – classification C5
Further technical specification
- Pendulum impact test with 900 Joule (fall proof)
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width = 1800 mm
(broader elements are available divided by glazing bars)
STG ISO
36 BT50 / 46 BT60

With its high-quality all-glass look this louvre window is designed for flush installation in glass façades. Window and slat frames are made of thermally separated aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The visible width of the vertical slat profiles is 33 mm on the inside, the horizontal slat joint is 66 mm on the inside. The STG ISO is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
Choice of various insulating glazing options up to a 3-fold insulation glazing with u-values of up to 0.5 W/m²K
Variable slat height: 120 – 400 mm
Total thickness of slats: 42 mm (with a 6 mm thick outer pane)
Sealings:
Lateral with sealing brushes
Horizontal profile joints with sealing brushes and EPDM gasket
Technical specification tested as per DIN EN 12101-2:2003:
- BT50 – Aerodynamic: Cv = 0,53 – 0,58 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,47 – 0,51 (opening angle 64°)*
- Structural stability under wind load WL 2500
- Function at low temperatures: T-20*
* subject to model and size
Technical specification tested as per DIN EN 14351-1:2006+A1:2010
- Driving rain tightness according to DIN EN 12207:
BT50 – classification 4A
BT60 – classification 7A - Joint permeability according to DIN EN 12208:
BT50 – classification 3
BT60 – classification 4 - Wind resistance according to DIN EN 12210:
BT50 – classification C2
BT60 – classification C5
Further technical specification
- BT50 – Airborne sound insulation according to DIN EN ISO 717-1: 41 dB*
- Ball impact resistance according to DIN 18032-3: existing
- Burglar resistance according to DIN EN 1627: BT60 – RC2
- Pendulum impact test with 900 Joule (fall proof)
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width = 2000 mm
(broader elements are available divided by glazing bars)
GG ISO
24 BT50 / 32 BT60

This system combines the benefits of thermally insulated systems and an appealing all-glass look. Window and slat frames are made of thermally separated aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The system has only a vertical frame section with a visible width of 33 mm without a horizontal blade profile. The GG ISO is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
- The insulated glazing of your choice is fitted into a lateral border profile
- Total thickness of slats: BT50 – 24 mm, BT60 – 32 mm
- Slat height BT50 variable: 120 – 300 mm
- Slat height BT60 variable: 200 – 350 mm
Sealings:
- Lateral with sealing brushes
- Horizontal profile joints with sealing brushes and EPDM gas
Technical specification tested as per DIN EN 12101-2:2003:
- BT50 – Aerodynamic: Cv = 0,54 – 0,61 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,49 – 0,55 (opening angle 64°)
- *Structural stability under wind load WL 3000
- Function at low temperatures: T-20*
*subject to model and size
Technical specification tested as per DIN EN 14351-1:2006+A1:2010
- Driving rain tightness according to DIN EN 12207:
BT60 – classification 4A - Joint permeability according to DIN EN 12208:
BT60 – classification 4 - Wind resistance according to DIN EN 12210:
BT60 – classification C2
Further technical specification
- Pendulum impact test with 900 Joule (fall proof)
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width BT50 = 1400 mm (NSHEV 1000 mm)
- Maximum frame width BT60 = 1500 mm
(broader elements are available divided by glazing bars)
GG bevelled edge
BT50 / BT60

In addition to its high standards of transparency provided by pivoted frameless glass slats, the allglass system offers a flush-mounted look. The frame construction is made of extruded aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The GG Bevelled Edge is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
Slats consist of pivoted all-glass single glazing panes made of ESG glass with circumferentially polished glass edges.
The horizontal glass edges have 30° mitres
Glass thicknesses: BT50 – 6, 8 or 10 mm, BT60 – 12 mm
Variable slat height: 120 – 300 mm
Sealings
- Lateral with felt seal and sealing brushes
- Frame gasket made of silicon
Technical specification tested as per DIN EN 12101-2:2003
- BT50 – Aerodynamic: Cv = 0,52 – 0,59 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,48 – 0,54 (opening angle 64°)*
- Structural stability under wind load WL 1500
*subject to model and size
Possible sizes
- Minimum frame width = 300 mm
- Minimum frame width = 300 mm
- Maximum frame width BT60 = 1800 mm
(broader elements are available divided by glazing bars)
GG step-cascaded glass
BT 50 / BT60

As an all-glass system the GG Step-cascaded glass also impresses by its flush-mounted appearance, which is achieved by overlapping horizontal glass edges that are designed in steps. Like the GG SK30, the frame construction is made of extruded aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The GG Step-cascaded glass is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
- Slats are made of a point-supported 2-fold VSG glazing (laminated safety glass) (TVG (partly toughened glass) or ESG (single safety glass) panes) with circumferentially polished glass edges.
- Glass slats come standard with axle bearings.
- Glass thicknesses: BT50 – 8 mm, BT60 – 12 mm
- Variable slat height: 120 – 300 mm
Sealings
- Lateral with felt seal and sealing brushes
- Frame gasket made of silicon
Technical specification tested as per DIN EN 12101-2:2003
- BT50 – Aerodynamic: Cv = 0,52 – 0,59 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,48 – 0,54 (opening angle 64°)*
- Structural stability under wind load WL 1500
*subject to model and size
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width BT50 = 1500 mm (1400 NRWG)
- Maximum frame width BT60 = 1800 mm
(broader elements are available divided by glazing bars)
GG overlapping
BT50 / BT60

The difference to GG Step-cascaded glass is that GG Overlapping slats have no steps in horizontal direction for a flush-mounted look, but imbricate when closed. The GG Overlapping frame also consists of extruded aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm. The GG Overlapping is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
- Slats consist of point-fixed all-glass single glazing panes made of ESG glass with circumferentially polished glass edges.
- Glass thicknesses: BT50 – 6, 8 or 10 mm, BT60 – 12 mm
- Variable slat height BT50: 120 – 300 mm
- Variable slat height BT60: 200 – 300 mm
Sealings
- Lateral with felt seal and sealing brushes
- Frame gasket made of silicon
Technical specification tested as per DIN EN 12101-2:2003:
- BT50 – Aerodynamic: Cv = 0,52 – 0,59 (opening angle 78°)*
- BT60 – Aerodynamic: Cv = 0,48 – 0,54 (opening angle 64°)*
- Structural stability under wind load WL 1500
*subject to model and size
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width BT50 = 1500 mm (1400 NSHEV)
- Maximum frame width BT60 = 1800 mm
(broader elements are available divided by glazing bars)
GG Joint
BT50 / BT60

The GG Joint glazings have no steps or bevelled edges, but stand on top of each other with a minimal joint of 2 mm. This makes the GG Joint a low-cost alternative amongst the available all-glass louvre windows. The GG Joint frame too is made of extruded aluminium profiles with a frame construction depth of 50 or 60 mm and a frame face width of 38 mm.
Louvre blades:
- Slats consist of point-fixed all-glass single glazing panes made of ESG glass with circumferentially polished glass edges.
- Glass thicknesses: BT50 – 6, 8 or 10 mm, BT60 – 12 mm
- Variable slat height: 120 – 300 mm
Sealings:
- Lateral with felt seal and sealing brushes
- Frame gasket made of silicon
Technical specification tested as per DIN EN 14351-1:2006+A1:2010:
- Resistance to repeated opening and closing classification 3 (DIN EN 1191)
Possible sizes
- Minimum frame width = 300 mm
- Maximum frame width = 1500 mm
Louvre window eal

The uniqueness of the louvre window EAL is found in its slats that open completely outwards and are fitted with a self-retained locking mechanism. Optically, the construction impresses by its flush-mounted all-glass appearance. Frame and blades are made of thermally separated aluminium profiles with a frame construction depth of 171 mm and a frame face width of 60 mm at the inside. The visible width of the vertical blades is 65 mm. For the assembly, an adapter profile is already mounted at the element. Available sizes on request.
Louvre blades:
Slats are also made of thermally separated, extruded aluminium profiles. 2- or 3-fold insulating glazing of your choice is available up to a total thickness of 38 to 46 mm.
Sealings:
- Two sealing levels designed for longevity with special TPE/PP structure
Technical specification tested as per DIN EN 12101-2:2003
- Aerodynamic: Cv = 0,53- 0,58 (opening angle 80°)*
- Structural stability under wind load WL 2500
Technical specification tested as per DIN EN 14351-1:2006+A1:2010:
- Driving rain tightness according to DIN EN 12207: Classification 9A
- Joint permeability according to DIN EN 12208: Classification 4
*subject to model and size.
Possible sizes by request
NTL ISO 24
BT50

The NTL ISO 24 BT50 was developed as a glazed supply air element for industrial use. Window and louvre frame are made of extruded aluminium profiles with a frame construction depth of 50 mm and a frame face width of 38 mm. The 2-fold insulating glazing infill is circumferentially framed. The visible width of the vertical slat profiles is 200 mm on the inside, the horizontal slat joint is 49 mm on the inside. The NTL ISO is approved as a natural smoke and heat extraction system according to DIN EN 12101-2:2003.
Louvre blades:
Choice of panel or insulating glazing up to 2-fold insulating glazing.
Total thickness of slats: 24 mm
Variable slat height from 120 to 400 mm (120 – 245 mm as NSHE)
Sealings
- Lateral with sealing brushes
- Horizontal profile joints with sealing brushes
Technical specification tested as per DIN EN 12101-2:2003
- Aerodynamic: Cv = 0,56 – 0,61 (opening angle 78°)*
- Structural stability under wind load WL 3000
* subject to model and size.
Possible Sizes
- Minimum frame width = 300 mm
- Maximum frame width = 2000 mm
(NSHEV 2000 mm)
(broader elements are available divided by glazing bars)