Hot Water Tank Size Calculator Australia

It depends on the tank capacity source of heat burner or element and the size of the burner or element.

Hot water tank size calculator australia. 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. Before buying a tank water heater most homeowners want to get a rough idea of the water heater size their family needs. The first hour rating is the number of gallons of hot water the heater can supply per hour starting with a tank full of hot water. This is assuming 3 showers running simultaneously with 3 star water saving shower head.

That said a mains pressure system can use about 18 litres of water per minute at 40 degrees celsius if a decent quality shower head is used. 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. Split systems which store the hot water in an external tank are generally favoured over thermosiphon systems for households with a bigger demand for hot water. Total volume of a cylinder shaped tank is the area a of the circular end times the length l.

When selecting the size of the hot water cylinder a simple rule of thumb is that for a typical domestic household you should allow between 35 and 45 litres for every occupant. V tank π r 2 l calculate the filled volume of a horizontal cylinder tank by first finding the area a of a circular segment and multiplying it by the length l. In practical terms this may mean running out of hot water when you are in the middle of the shower lets see how you can avoid this scenario and get the correct tank size. How to determine the size of a water heater tank.

A π r 2 where r is the radius which is equal to 1 2 the diameter or d 2. 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. Pro size is intended to assist in selecting water heaters or boilers that best meet the specific job requirements. The energyguide label lists the first hour rating in the top left corner as capacity first hour rating.

As an example an instant hot water heater size for family of 5 would be a 21 litres per minute flow rate vs a hot water tank size for family of 5 would be 230 300l 60 80 gallons.