Continuous Flow Hot Water Auckland

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What Is Continuous Flow Hot Water?

A continuous flow system heats water on demand as it passes through the unit. There is no storage tank and no waiting for a cylinder to reheat. When you turn on a hot tap, cold water flows through the unit, a gas burner ignites, and a high-efficiency heat exchanger heats the water to your set temperature in seconds. When you turn the tap off, the burner stops. It is that simple.

This on-demand approach means you never run out of hot water. Whether you are running back-to-back showers, filling a bath, and doing the dishes all at once, a correctly sized continuous flow system keeps delivering. There is no tank to drain and no recovery time to wait through.

How It Works

When a hot tap is opened, a flow sensor inside the unit detects the water movement and activates the gas burner. Water passes through a series of copper heat exchanger fins where the gas flame heats it rapidly. The unit modulates the flame size to match the flow rate and maintain a consistent outlet temperature. When all hot taps are closed, the unit shuts down completely, using no gas at all.

Benefits of Continuous Flow

• Unlimited hot water -- no cylinder to empty. Hot water runs for as long as you need it.
• Energy efficient -- the unit only fires when hot water is being used. No standby heat losses like a cylinder that keeps water hot 24 hours a day.
• Space saving -- the compact wall-mounted unit replaces a large floor-standing cylinder, freeing up valuable space in your home.
• Long lifespan -- well-maintained continuous flow units typically last 15 to 20 years, significantly longer than most hot water cylinders.
• Precise temperature control -- modern units let you set an exact outlet temperature, reducing the risk of scalding.

Our Continuous Flow Range

When to Choose Continuous Flow Over a Cylinder

Continuous flow is an excellent choice when you want unlimited hot water without the bulk of a storage cylinder. It suits homes where space is limited, where multiple people use hot water at different times throughout the day, or where the existing cylinder has reached end of life and you want a long-term, efficient replacement.

If your home already has a gas connection, switching to continuous flow is straightforward. For homes without gas, LPG-powered units are available and can be installed with gas bottles on an external stand.

Gas Types Available

Continuous flow units are available in both natural gas and LPG configurations. If your property has a natural gas connection from the street, a natural gas unit is the most cost-effective option for ongoing running costs. For properties without reticulated gas, LPG models connected to gas bottles provide the same performance and are a popular choice across Auckland.

Installation Requirements

Every continuous flow installation requires:

• Gas connection -- either natural gas or LPG supply, correctly sized for the unit's demand.
• Flue clearance -- the unit must be installed externally or with an approved flue system. Minimum clearances to windows, doors, and boundaries must be maintained as per AS/NZS 5601.
• Electrical power point -- a standard 230V power outlet is required near the installation location for the electronic ignition and control system.
• Certified gasfitter -- all gas work in New Zealand must be carried out by a registered and certified gasfitter. We handle the full installation, gas certification, and compliance documentation.