Output heat capacity: 28.9kw Maximum water temperature of the heating circuit: 85c Maximum temperature of hot water circuit: 60c Minimum start-up water pressure: 0.3bar Maximum pump height: 6mwc Expansion source capacity: 12lit The size of the heating system inlet and outlet connections: 3/4 The size of sanitary water inlet and outlet connections: 1/2 Gas connection size: 3.4 inches Maximum nominal power: 31kw