What size tanks or water capacity do I need to supply a shower?
For normal domestic use we recommend a cold water storage tank of not less than 225 litres (50 gallons). Hot water storage will depend on a number of factors such as frequency of showering, length of shower, flow rate of shower and recovery time of the boiler. As a rule of thumb a shower will use 2/3 hot water and 1/3 cold water. For example an Aquastream Thermo with a flow rate of 18l/m on boost will use 12 litres of hot water a minute. Therefore will use up the contents of a small normal domestic HW storage cylinder containing 117 litres of which 93 litres is useable, in just under eight minutes. We recommend that the larger the storage cylinder you fit, the better.
