Two-stage systems and two-stage fires have a 300-stage 1,200 kW system and are preferred to reduce the number of shocks (runway number and service life) in single-stage (open-closed) fires. However, due to increased fuel costs, the use of open-closed burners has virtually disappeared and systems with modifications exceeding 500 kW have been used. Under previous conditions, we can upgrade the two-stage modes you use and convert them into those that are proportional to electronic modulation. Revision Very old or undamaged burns due to working conditions will be recycled in our workshop and returned to the first days to ensure the most efficient operation.