Gas type: Natural Gas, LPG Input power range: 26.3 KW Output power range: 23.9 KW Minimum input capacity for heating circuit: 11.2 KW Minimum output capacity for heating circuit: 9.5 KW Minimum input capacity for hot water: 9.8 KW Minimum output capacity for hot water: 8.1 KW Efficiency: 90.8% Heating system operating pressure range: 0.5-3 Bar Maximum heating water temperature: 90 C Measured electrical power: 125 W Degree of electrical protection: IPX4D Expansion chamber capacity: L Expansion chamber pressure: 1 Bar Heating area: 60-220 square meters Combustion products: 1.23-2.60 m / h Liquefied gas combustion: 0.65-1.90 kg / h Maximum working pressure: 6 Bar Minimum working pressure: 0.3 Bar Maximum water volume capacity at a temperature difference of 30 degrees: 11.3 L / min Minimum water flow for start-up: 2.5 L / min Net weight: 38 Kg