Water Heater packages introduction Page contents Page contents Package of Water Heater Energy Label Understanding the Package of Water Heater Energy Label Water heating functionWater heaterEnergy efficiency class of the water heaterPackage with solar collectorPackage with hot water storage tankScale of energy efficiency classes from A+++ to GEnergy efficiency class of the water heater package Hot water storage tank energy label Understanding the Hot Water storage Tank Energy Label Water storage functionScale of energy efficiency classes from A+ to FThe energy efficiency class of this productStanding loss in WStorage tank volume in Litres Solar devices The solar devices don't have an energy label but are part of the package of the water heater. Add more information here.