One of the most important tasks during construction and maintenance of buildings and compartments is a fire-safety provision of the premise. Generally, the most reliable, effective and economical method of fire safety provision is implementation of automatic extinguishing units (AEU), water-based ones in particular, which effectively protect people and material assets. The present article contains an economic evaluation of applicability of innovational AEU with electrical activation and monitoring of activation (AEU with EA and MA) in comparison with traditional AEU. Results of hydraulic calculations, the choice of a general pressure of the system, water discharge, pipeline diameter and their cost are presented.