EPAL 20000 Bi-Fold aluminum System

The EPAL 20000 range Bi-Fold Aluminum system combines all of the advantages of the 18000 range, namely a revolutionary thermal break system, a special polyamide and polyurethane design for even better thermal insulation, without sacrificing design or functionality in any way.

The 20000 range Bi-Fold aluminum system, combined with double or triple thermal insulating glazing, constitutes the optimal solution for areas with extreme temperatures.

• Thermal break profile. 36mm polyamide thermal break, internally reinforced with cast polyurethane.
• Bi-Fold
• Crimp corners.
• Perimeter locking mechanism at up to 14 points, ensuring the highest level of security.
• The mechanisms used are ROTO NT by the German company ROTO Frank, a leader in frame mechanisms.
• Frames can be manufactured using two colors (different color inside and out).
• EPDM perimetric gaskets for perfect sealing.
• Accompanied by blinds or shutters, as well as screens.
• Constructed using specific materials and fittings which fulfill predefined high-quality specifications.
• Manufactured under controlled production processes that ensure consistently high quality.

• Very high thermal insulation performance. Due to the special polyamide thermal break, the EPAL 20000 system allows the construction of frames with excellent thermal insulation characteristics (up to U-Factor 0.15 ).
• High sound insulation levels. In combination with the company’s triple glass panes, the EPAL 20000 range can reach a weighted sound reduction index Rw (C; Ctr) = 38 (-2; -6) dB.
• High watertightness and airtightness.
• High resistance to mechanical stress during use and very good functionality.
• Superior aesthetics with a wide range of colors and high quality electrostatic powder coating.
• EPAL 20000 Ultra K range frames are installed by expert technical staff on any surface, using special fittings and insulating materials that ensure a perfect fit.

EPAL imports glass panes from the world’s leading glass producers.
The 18000 sliding frame systems are equipped with double thermal insulating glazing. The type of glass used is Float glass.  The main combination is a 6mm Planistar glass outside, 4mm glass inside, and a gap of 15mm between the two glass panes (6Planistar – 15 – 4).
This combination has a thermal transmittance of Ug=1.0 W/m2K and very good soundproofing properties (Rw = 36dB, according to ISO140/3-78 tests – Test No. Α6.121.96).

The double glazing is initially glued using two Butyl PIB cords (special plastic glue) which are placed along the perimeter of the aluminum spacer placed between the two glass panes. Butyl PIB is highly resistant to temperature variations: -30°C to 80°C and 160°C (for a limited period of time) and has very low thermal conductivity. The aluminum spacer is filled with desiccants that ensure a longer life for the glass pane.

Apart from the special Butyl PIB glue, an additional two-component glue (polysulfide sealant) is used externally along the perimeter of the glass; this glue is elastic and also highly resistant to temperature variations. In this way, the air between the two glass panes does not come in any contact with the ambient air, therefore it is impossible for the glass to become less transparent over time.

EPAL has been certified by the German Ift Rosenheim Institute regarding the sealing processes of thermal insulating glazing and thermal insulating glazing using gas in accordance with the DIN EN 1279-2 and DIN EN1279-3 standards.

Apart from the standard 6Planistar– 15 – 4 glazing, which has a thermal transmittance Ug=1.0 W/m2K, the E50 range may also include triple glazing with special coatings – Low E soft coating and Low E hard coating.