The 18000 Ultra K aluminium frame series is one of EPAL’s most modern and versatile creations, thanks to its innovative design and the wide range of typologies it offers.
One of the series’ most significant advantages is the innovative combination of cast thermal break and polyamide thermal break. This powerful dual thermal barrier enables the system to achieve an exceptionally low thermal transmittance coefficient (Uw), starting from 0.78 W/m²K, depending on the number of glazing layers used. The result is high thermal insulation and continuous energy savings for both heating and cooling of interior spaces.
The frames of the series offer high-precision security thanks to the top-tier German Roto NT hardware system. When closed, the window locks around its perimeter at up to 14 points—depending on the frame dimensions—ensuring optimal burglary protection.
The 18000 Ultra K casement windows are an advanced solution designed to meet high-performance demands across a wide range of applications. They are compatible with insect screens, roller shutters, or traditional shutters.
Why choose the 18000 Ultra K?
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The new EPAL window series features an innovative design that incorporates a dual thermal break system—a combination of cast thermal break and polyamide thermal break—significantly reducing the thermal transmittance coefficient to as low as Uw = 0.78 W/m²K, depending on the glazing configuration used.
The thermal insulating glazing units used in the EPAL 18000 Ultra K series can be double, triple (with two cavities), or even quadruple (with three cavities). The profiles have a square design and are equipped with the German ROTO NT perimeter locking mechanism by ROTO.
The EPAL 18000 Ultra K window systems feature the following characteristics:
Typologies:
The EPAL 18000 Ultra K window series ensures:
Installation of the EPAL 18000 Ultra K frames is carried out by specialized technical personnel on any surface, using certified accessories and insulation materials to ensure perfect fitting.
EPAL imports glass panels from the largest glass manufacturing companies in the world.
The aluminum profiles of the EPAL 18000 series are made from aluminum suitable for window frame construction (DIN 1748).
Alloy: AlMgSi05F22
Hardness (Brinell): 70
Tensile Strength (N/mm²): 125
Yield Strength (N/mm²): 160
Elongation A10 (%): 10
The profiles of the EPAL 18000 series are EPAL’s proprietary design:
Protected by intellectual property rights (patents) with the Greek Industrial Property Organization (OBI).
Manufactured with extrusion dies designed and owned by EPAL, which are strictly controlled for acceptable tolerances.
Exclusively used by EPAL.
The cross-sections of the aluminum profiles (frame and leaf) of the EPAL 18000 series have the following technical specifications:
| Frame Width: | 84,6 mm |
| Frame Height: | 60 mm |
| Frame Weight: | 1849 gr/m |
| Leaf Width: | 84,6 mm |
| Leaf Height: | 47,5 mm |
| Leaf Weight: | 1854 gr/m |
| Maximum Leaf Width: | 1600 mm |
| Maximum Leaf Height: | 2400mm |
| Maximum Leaf Weight: | 100kg |
The aluminum profiles of the EPAL 18000 series are coated with electrostatic powder coating in EPAL’s new and state-of-the-art facility, after appropriate surface treatment (pre-cleaning and chromating) to ensure optimal paint adhesion and guarantee high quality and durability.
