New bimetallic (stainless steel - copper) condensing heat exchanger.
Total premix burner with low NOx emissions: Class 6 (UNI EN 15502).
Low Energy modulating synchronous pump (ErP compliant - EEI 0.20), 7m head, with anti-blockage cycles system.
Built-in 18 lt. expansion vessel (on 35 R.S.I. model).
18 lt. internal expansion vessels available as option (for the 50 DEP R.S.I., 50 R.S.I. and 50 models).
Built-in 3 ways valve with anti-blockage cycles system (on the models 35 R.S.I, 50 DEP R.S.I., 50 R.S.I.).
Climatic thermoregulation as standard with outdoor probe (as option).
Management of three circuits: high temperature, low temperature and DHW tank.
ΔT flue/water return: max 5°C.
LPG conversion kit available as as standard.