Installation housings are used for in-situ concrete and precast concrete. The advantages of these housings are their low cost and fast installation. No special tools are required for adapting tubes. The installation housings can be aligned easily on the formwork table and the nail fastening is located outside the housing. IBTLED are universal installation housings for prefabricated constructions. These housings serve as a fixture for the installation of luminaires, loudspeakers or call systems. With the IBTronic products, Spelsberg offers universal installation housings with additional connection space. They are used for installation for in-situ concrete or prefabricated construction, are suitable for adhesive and nail fastenings and are suitable for the installation of VDE-tested lamps. The outlet opening with Fermacell® plasterboard is variable by up to max. Ø 150 mm.