Electrical installation box for final insulation with hole saw KEFZ 80/VDZ_KB

Advanced solution for insulated facades

The KEFZ 80/VDZ_KB electrical installation box is a specialized solution designed for mounting electrical devices in insulated building facades with an insulation layer thickness of at least 80 mm. The product enables the safe installation of sockets, switches, and other electrical accessories within external insulation layers made of facade polystyrene or mineral wool.

A key advantage of this solution is the possibility of mounting in already completed thermal insulation, which eliminates the need to plan the electrical installation during the building insulation stage. This allows installers to flexibly adapt the placement of electrical points to the current needs of users.

High-quality construction and materials

The box is made of polypropylene (PP) - a lead-free plastic with high durability and resistance to weather conditions. The material features self-extinguishing properties, which significantly increases the level of operational safety. The design provides for three membrane cable entries and the possibility of mounting a single accessory insert. The windproof construction protects against adverse weather conditions.

Complete mounting kit

The package contains all the necessary elements for professional installation: the electrical installation box, a manual hole saw for making the hole in the insulation, a screw carrier, a set of mounting screws, and a detailed installation instruction. The set has been designed as a complete "first installation" solution, meaning it includes all the tools needed to make the first hole.

For subsequent installations, it is sufficient to purchase only the KEFZ 80 box without the tool kit, making the solution economically attractive for larger projects.

Safety and regulatory compliance

The product meets the requirements of the highest safety standards of European norms EN 60 670-1 and ČSN EN IEC 60670-1 ed.2. The halogen-free construction eliminates the release of toxic gases during combustion, which is particularly important in residential buildings.

Safety properties include lead-free material that is safe for health and the environment, self-extinguishing properties ensuring automatic extinguishing after the fire source is removed, and a high glow-wire test temperature confirming resistance to electric arcs. The A1-F fire reaction class provides the highest classification of substrate non-flammability.

Energy efficiency and elimination of thermal bridges

The design of the KEFZ 80/VDZ_KB box eliminates the formation of thermal bridges thanks to the precise fit to the insulation layer thickness and the tight seal against the insulation material. It ensures the continuity of the facade's thermal parameters and allows for the installation of a double electrical socket while maintaining all installation safety parameters.