Central flush-mounted control unit of the Z-WRG PLUS and Z-WRG RONDO PLUS series with heat recovery. Controlling of 2 to 6 fans for automatic and demand-controlled ventilation operation in 5 air stages and 4 stored program functions: Sensor ventilation Efficiency ventilation Cross ventilation Pulse ventilation Power connection:   NYM-J 3 x 1.5 Supply voltage:    230V