1 or 2.
Water tank size for family of 4.
For a tank style heater household size is a simple indicator of hot water needs.
Storage tank hot water heaters are sized based on btu input and capacity in gallons.
Again the more you rely on hot water on a regular basis the more btus and capacity you ll need.
Choose a hot water heater with a tank size in the range of 50 to 60 gallons on the fhr label.
This is probably one reason why our 5 000 gallon 22 500 litre tank and 5 400 gallon 24 500 litre tank outsell all other sizes.
With these two figures combined with your catchment area and water usage we can now calculate the optimum size for a water tank to suit your needs.
A hot water tank size for family of 5 would be in the 230 300l range 60 80 gallons.
For an instantaneous hot water unit servicing two water saving shower heads you would need a hot water heater with a flow rate of at least 16l min.
For example think about how.
This tank size based on the scenario in step 2 is adequate for the peak hourly hot water.
Taking a 4 person household for example located in rural victoria with 452 litres usage a day and an average roof area of 200m2 we can head over to the alternative technology association s tankulator tool.