Hot Water Tank Size Calculator Australia

Before buying a tank water heater most homeowners want to get a rough idea of the water heater size their family needs.

Hot water tank size calculator australia. Smith pro size sizing program is a tool that can be used to estimate water heater requirements for many common applications. 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. 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. 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.

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. How to determine the size of a water heater tank. 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. As a rule of thumb households with a higher demand for hot water will need to install more or larger solar collector panels or evacuated tubes on the roof.

Total volume of a cylinder shaped tank is the area a of the circular end times the length l. 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. 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 size tank is one of the most competitive sizes in the industry meaning you are bound to get the best price per litre on them.

The energyguide label lists the first hour rating in the top left corner as capacity first hour rating. It depends on the tank capacity source of heat burner or element and the size of the burner or element. 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. This is assuming 3 showers running simultaneously with 3 star water saving shower head.

Pro size is intended to assist in selecting water heaters or boilers that best meet the specific job requirements.