Fire-fighting unit compliant with UNI EN 12845 and UNI 10779 standards equipped with an electric pump or a diesel motor pump. Group 1 KDN Compact is designed for automatic fire extinguishing systems equipped with sprinklers and/or hydrants. Multiple KDN Compact can be paired. Pump coupled by an elastic spacer joint to an electric (IE3) or diesel engine capable of providing zero flow and flow corresponding to an NPSH16M. Modular version to facilitate transport and installation even in the presence of narrow access doors. Through a coupling kit (supplied separately) it is possible to assemble all the compositions required by the standard, with one, two or three electric or diesel pumps, with and without compensation pump. Cooled motors with water-water heat exchangers available on request. Compensation pump optional, can be chosen from JET, KV or KVC pump. There is an electrical control panel for each pump, connected to the main components (motor, pressure switches, sensors, batteries). Technical verification of compliance with the standard certified by a third party.