ABSTRACT
Sizing hot water and cold water supply systems, like space-heating systems, is done from a knowledge of flow rates in each pipe section. However, determination of the flow rates for hot and cold water supply is a function of the simultaneous consumption of water. This will vary from one system to the next, depending upon the usage of the draw-off points or fittings on the system, for it would not normally be appropriate to assume that all draw-off points in that system will be in use simultaneously.
