When designing a SWH system, one of the important design parameters required is the DHW average daily demand. Another important parameter is the cold water temperature design tering the SWH system.
This temperature is critical to the optimum design of the system and should be chosen as accurately as possible, considering the variance in the cold water temperature from source during winter and summer time as well as during the day and at night. Normally, this is water coming from DEWA, ADWEA, SEWA or FEWA and should be checked with the authorities for the correct temperature variance;