© Oroflam s.r.l. 2011 Technical Characteristics Table NOx class Efficiency G20  G25  G31 Fuel 5 2.5 kW Minimum output to water 80°C/60°C Nominal thermal efficiency 80°C/60°C Efficiency at 30% nominal power Nominal thermal efficiency 50°C/30°C Heating Characteristics Temperature range for radiators heating system Expansion vessel Maximum system pressure Maximum system temperature 98% 108% 108% 40 - 80 °C 7 l 3 bar 90 °C The optional chronothermostat 2.8 kW Minimum rated output 15 kW Nominal output to water 80°C/60°C Oroflam s.r.l. produces three 15 kW condensation wall-hung boiler versions: ORK 15R is an only heating condensation wall-hung boiler for indoor installation; ORK 15RE is an only heating condensation wall-hung boiler for outdoor installation; ORK 15RI is an only heating condensation wall-hung boiler for embedded installation. Electrical Characteristics Power supply Power consumption Protection rate Overall Dimensions & Connections Width Height Heating system outlet / inlet connections Depth Gas connection Gas Supply Pressure G20 G25 Type ORK 15R ORK 15RI ORK 15RE 230 V  50 Hz 180 W IP X4D 410 mm 780 mm 230 mm ¾’ ¾’ 20 mbar 25 mbar Privacy & Cookies 16.2 kW Nominal rated output 3.6 kW Minimum output to water 50°C/30°C 27 kW Nominal output to water 50°C/30°C Temperature range for floor heating system 20 - 40 °C IP X5D Weight 35 kg G31 37 mbar Inlet / outlet separate draught tube diameters 80 / 80 mm Inlet / outlet coaxial draught tube diameters 60 / 100 mm NEW! Besides the heating field, Oroflam s.r.l. deals also with plastic moulding, windings,  solenoid valves and cables production for third parties: please go to the site  homepage to see all our services.