Gas

Continuous flow gas hot water: a buyer's guide

Continuous flow heats water as you use it, so it never runs out. The key to getting it right is sizing it to how many outlets your household runs at once.

Get a price

Call (08) 6011 1561 Request a quote

Licensed and family-run from Wilson since 2014.

How does continuous flow gas hot water work?

Instead of storing hot water in a tank, a continuous flow unit heats it on demand as it passes through, so you get hot water for as long as you need it.

The short answer: Continuous flow gas hot water heats water as you use it, so it never runs out. The key decision is sizing the unit to how many outlets your household runs at once.

With no tank, there is no stored water to run out and nothing reheating in the background. The unit fires when you open a hot tap and stops when you close it.

It is one of the gas hot water options we fit; for the wider category see gas hot water, and for all fuel types see the hot water systems hub.

A wall-mounted continuous flow gas hot water unit on a Perth home

What size do you need: 16, 20 or 26?

Continuous flow units are rated in litres per minute. The right size is about how many showers and taps run at the same time, not the number of bedrooms.

16 L/min
20 L/min
26 L/min
Temperature controllers

A smaller unit suits a couple or a single bathroom; a larger one is for households that run two showers, or a shower and the kitchen, at once.

Add a wall controller and you can set an exact temperature, which is safer for children and more comfortable than guessing at the tap.

Is it really endless, and does it work on LPG?

It is endless in the sense that it will not run out mid-shower, within the unit's flow rate, and yes, continuous flow runs on natural gas or LPG.

The one limit is flow rate: size it correctly and it keeps up with how you use hot water. Undersize it and two showers at once will feel weaker.

We install on natural gas and LPG, size it to your home, and certify the work.

FAQ

Common continuous flow questions

Yes, if it is sized for it. A larger unit, for example 26 litres per minute, handles simultaneous outlets; a smaller one is for lighter use. We size it to your household.

It will not run out of hot water like a tank can, within its flow rate. The limit is how much it can heat per minute, which is why correct sizing matters.

It depends on how many hot outlets you use at once. We work that out with you so it is neither undersized nor over-spent.

Yes. Continuous flow gas hot water runs on natural gas or LPG. We set it up for whichever you have.

It depends on the unit and the install, so we quote up front before any work starts. Request a quote and we will sort it.