RETROFaçade

Daylight deflection systems are suitable for installation in protected cavities

on the inside of insulating glazing or
on the outside of insulating glazing behind a baffle pane

The aim is to avoid absorption and heat development in window/facade frames and to either reflect the radiation penetrating through the glass facade back outwards or to redirect it inwards for improved room illumination.

This task can be optimally realized as follows:

Glazing bead installation in the window area
Arrangement of the systems on the outside of a window
Arrangement of the blinds within a mullion-transom construction
Arrangement of façade glazing behind a baffle plate.

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Window and façade concepts with RETRO technology

Perfect Window

The glazing bead installation of light control systems on the inside of a window is an optimal solution from an energy point of view. The incident radiation is reflected directly to the outside by means of light deflection.

Smart Window

The systems are installed on the outside of the insulating glazing behind a baffle pane. These windows are characterized by minimal energy input from secondary heat radiation and enable the lowest g-values. High-quality light control systems can be used, which are protected behind the outer baffle pane, particularly against wind loads and soiling. In contrast to conventional external sun shading, these systems also provide glare protection regardless of external weather conditions.

Internally doubled facade

In mullion-transom constructions, the blinds should be arranged directly behind glass in the construction area of the mullions and transoms. Additional internal glazing reduces secondary heat radiation and improves the U-value of a façade. This design variant is therefore particularly suitable for energy-efficient refurbishment.

Closed Cavity Façade (CCF)

The Closed Cavity façade is an alternative to the rear-ventilated façade and is particularly suitable for installing high-quality daylight control systems on the outside of the insulating glazing. The air cavity is permanently condensation-free and protected from external weathering.

Smart Window

Window sash with attachment frame
RETROLux in closed cavity

Window sash frame
Window frame profile
Aluminum attachment frame
RETROLux blind 25 mm or 20 mm
Baffle plate for sound insulation made of laminated safety glass
Blind head rail
Moving shaft
Cover frame according to client's color preference
3-pane insulating glass

DPMA, Deutsches Patent- und Markenamt,
10 2024 000 871.3, 10 2024 000 227.8

Light control system arranged in front of the window behind a
baffle plate as a slide-in unit in an attachment frame.
Advantages:

Revisability of the blind
No wind load
No soiling
Lower maintenance costs
Improved g-value

Internally doubled façade

The following innovative variants of an internally doubled façade are an extremely energy-saving support for the air conditioning of buildings, as only the minimum air volume of the façade cavity is tempered without the external heat load reaching the interior. Using the retrojalousia, even negative g values are possible depending on the air temperature supplied, as the absorption at the louvre mirrors is < 5%. With the support of the cold air supply, the inner pane can even become a cooling surface for the interior.

Venetian blind cavity for RETROLux 20 / 25 mm slats

The key design feature is the patented, simple and quick installation of an inner pane. The secret is anchoring the inner pane by means of a locking rail 100, which slides over the upper front edge of the inner pane 101 and hooks into a hook profile 102 of a tambour door head rail 103. The pane sits at the bottom in a U-shaped seal on the frame profile. A U-shaped rubber profile is also used on the longitudinal edges, which is pushed laterally against the mullions and seals the cavity 105. Warm, humid air is expelled upwards when the sun enters.

Either the RETROLux venetian blind with a width of 25mm or 75mm is recommended as a sun and glare protection measure. The working and shading functions of these blinds are carried out in a horizontal slat position and simultaneously allow daylight to enter inwards and a view outwards.

Venetian blind cavity for RETROLux
75 mm slats

A U-profile (2) is fitted over the inner glazing (1), which sits on an angled rail (4) and forms a largely closed cavity (5).

The angle rail (4) is firmly connected to the blind head rail (6) in which the 230 V motor (7) and the winding mechanism of the blind (8) are installed. This results in an open channel (9) in the shadow gap, into which the motor cable (10) and the Hirschmann plug can be inserted.

The inner pane (1) is only secured by hooking onto the shutter head rail (7). Easy access to the blind for repairs is ensured by lifting the U-profile (2) off the angle rail (4) . An extension of the U-profile (2) also serves as a cover (11).

Schutzrechte/Industrial property rights
EP 3976919
Au 2020269906
Ca 53963-3003
USA 17609297
DE10 2023 004 684.1
DE10 2024 001 557.4
DE10 2024 003 455.2

Mullion-transom facade with
active cooling

The angled rail (4) also serves as a support for a cooling tube (12) that absorbs the heat from the cavity or from the louvre head rail. The aim is to reduce the secondary heat radiation to the interior and to dissipate the radiant energy in the façade zone without burdening the interior with heat radiation. While heat rises on the inside of the outer glazing (11), cold air falls on the inner glazing (8).

The angled rail (4) forms a condensate collection channel. This enables the flow temperature to be lowered to the condensation temperature. Moisture on the cooling pipe jacket increases the heat transfer value α. In combination with retro solar shading, this results in a highly effective measure to protect the interior from external heat radiation. The design is also recommended for façade renovations. g values < 0.05 with open blinds and high summer sun are easy to achieve.

Alternatively:
It is advantageous to introduce dried and cooled air into the cavity from below through a supply air trunk, which either exits into the interior through joints at the top or is extracted via an extraction trunk. In winter, the introduction of dried warm air can also prevent condensation from forming on the inside of the outer glazing.
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