■ 5 : 1 modulation ratio.
■ Efficiency ★★★★ according to European Directive EEC 92/423.
■ Low NOx (Class 5 according to European Directive UNI EN 483).
■ Condensing heat-exchanger in extruded aluminium providing excellent thermal transfer.
■ Built-in thermoregulation (with external probe available as option).
■ Ideal for low-temperature installations.
■ IPX5D electrical protection.
■ Built-in clapet for collective flue positive pressure chimney - non-return valve on flue side (only 25 C.S.I. and 25 R.S.I. models).