2S20
DOUBLE COIL (Copia2)

THE 2S20 MODEL, WITH TWO HEAT EXCHANGERS, ALLOWS THE COMBINED ACTION OF TWO HEAT SOURCES.
THIS MODEL CONNECTS ENERGY SOURCES AT DIFFERENT HEIGHTS TO HEAT DIFFERENT VOLUMES OF WATER. THUS THE LOWER COIL IS CONNECTED TO ENERGY SOURCES SUCH AS SOLAR OR WOOD STOVE, AND THE UPPER COIL IS CONNECTED TO A GAS/PELLET/OIL BOILER.