Gas Continuous Flow

How it works

Gas continuous flow systems burn gas to heat water as it runs through them. They can run on natural gas or LPG. Requires a gas supply or if gas is not reticulated to the house then gas bottles can be installed.

Keep in mind

When hot water is needed it can only be provided via the gas burner. Even though less space is required as there is no cylinder this means there is no stored hot water. If the gas burner is far away from the tap then hot water is not instantaneous.

Wastes water while running the hot tap at the other end of the house and waiting for the hot water to arrive. Can also waste gas as the burner fires up as soon as the tap is turned on.

This type of system tends to waste more water than other types while you wait for the water to get hot. This may be important to you, particularly if you are on tank water supply or metered water.

Relatively high install cost of $5 to $6k or more depending upon plumbing requirements. Maintenance will be required as soon as 4 or 5 years after installation.

You will have to pay a fixed charge for reticulated gas supply or use gas bottles. Gas bottles costs are high and need to be monitored to ensure they are replaced / replenished when empty.

As most require an electrical supply, you won't have hot water during power cuts (though power backup systems are available).

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