The Rinnai Infinity continuous flow hot water system is designed for wall mounting and uses technology that replaces the need for bulky storage tanks. The innovative infinity heat exchanger design provides high capacity flow rates whilst ensuring near mains pressure - you get all the hot water you need, when you need it and at flow rates that are not achievable using instantaneous electrical products. The 'external wall mounting' Infinity 'e' range is designed for wall mounting on an external wall outdoors and allows flexible, flueless installation. A popular application of the LPG model is to provide hot water at outbuildings used for for equestrian or agricultural purposes. The flow rate estimator tool below gives an indication of hot water flow rates that will be achieved for a given combination of heating power and water temperature rise.