Three-chambered system input structures designed to perform internal or external fire partitions.

NT 78EI allows the exercise of single and double doors opening to the outside and the inside of the various embodiments threshold. The system uses thermal inserts a width of 35 mm. The depth of frame and sash is 78 mm.

Thanks to the three-chamber structure and additional reinforcing elements, the system allows you to perform construction of large size. The system used two types of flame retardants cartridges: Cartridges plaster and contributions aluminosilicate. The system allows you to make smoke-resistant construction.

- Precise relation to other Ponzio systems;
- Flush door leaf
- Many variants of door leafs
- Possibility of arch structures
- The use of fillings 8-42 mm