7 Best Electric Instant Hot Water Heaters to Buy in Australia in 2024

Looking for a way to heat water without the inconvenience and waste of a storage tank?

Try electric instant hot water heaters, commonly known as tankless heaters.

These simple gadgets spring into action only when needed, preserving energy, saving water, and, eventually, your money.

Plus, they promise steady pressure and temperature unlike the usual tank water heaters which may vary the temperature of water, therefore extending the lifetime of the tank and protecting your pocket from severe costs.

In the guide below, we’ve analyzed the seven top electric instant hot water heaters available in Australia in 2024.

Stiebel Eltron DHE 27 AU

Product Overview

The Stiebel Eltron DHE 27 AU is a 3-phase electric instant water heater that can deliver up to 27 liters of hot water per minute, with full electronic control and a 4i technology that ensures accurate and consistent water temperature at all times.

It is convenient to use in multiple locations and ensures high energy efficiency and eco-friendliness, thanks to its ECO mode and energy and water consumption LEDs.

It also has a backlit multifunction display, individual memory buttons, and additional functions such as a temperature limit, a wellness shower program, an automated bath filling, and childproofing setting for greater convenience and safety.

Its size is ideal for larger homes with two bathrooms or more, or high hot water demands. If you need to service one bathroom only, we recommend buying the DHE 18 AU.

Specs:

Temperature setting: 20-60 °C
Colour: white
Height: 466 mm
Width: 225 mm
Depth: 116 mm
Weight: 3.10 kg
Energy efficiency class: A

Location: Indoor or outdoor

Warranty

5 years for domestic parts and labour
1 year for commercial parts and labour

Girard Prod 2GWHAM Tankless Water Heater

Product Overview

Convenient and robust, the Girard Prod 2GWHAM Tankless Water Heater offers instant hot water for your needs. Using 12V power, it works silently via a brushless motor and boasts a strong output of 42,000 BTUs, delivering hot water instantly.

Thanks to its in-built microprocessor, it constantly controls the temperature of the incoming water, the amount of water flowing, and that of the outgoing water, to properly calibrate the delivered output.

It’s efficient and environmentally friendly, using only half the energy that an alternative six-gallon tank heater would need for the same amount of hot water.

It also has an intelligent control panel, allowing you to adjust the temperature setting from 95 to 124°F, toggle between Fahrenheit and Celsius, get a continuous water outlet temperature reading, and more.

Specs:

Weight: 10.88kg
Width: 31.75cm
Height: 31.75cm
Depth: 39.37cm
Maximum Pressure: 55 PSI

Location: Indoor or outdoor

EEMAX HA027240 Electric Tankless Water Heater

The EEMAX HA027240 Electric Tankless Water Heater 27000W is a whole-house electric water heater that can provide up to 8 gallons per minute of hot water at a set temperature. It has a 99% energy efficiency rating and a digital temperature control.

It also has a durable, easily replaceable heating element, a copper heat exchanger with a brass top, and a vent-free design. Its size and capacity make it suitable for homes with two to three bathrooms and if you need to service more bathrooms, we recommend buying the HA036240.

Specs:

Height: 17 inches
Width: 17 inches
Depth: 3 inches
Weight: –
Max Pressure Rating: 150 PSI

Location: Indoor

Warranty

1 year limited warranty for parts and labor 5 year limited warranty for leaks

Rheem RTEX-13

The Rheem RTEX-13 is a rapid solution for hot water needs, and is a tankless heater that can handle multiple hot water demands at once. What’s cool is its digital thermostat and LED-screen, which allow you to vary the temperature of the water by a single degree from 80°F to 140°F.

Its two copper heating parts are built to last and are easy to swap out. Plus, it is fitted with a self-adjusting power control that matches energy use to the water flow.

Need to manage your heater from a distance? No problem. It smoothly pairs with the Rheem EcoNet app, allowing you to closely monitor and change the settings of your heater straight from your phone.

Specs:

Depth (in.) 3.63″
Height (in.) 12.63″
Width (in.) 8.25

Location: Indoor

Warranty

5 years for domestic parts and labour 1 year for commercial parts and labour

EcoSmart ECO 27 Tankless Electric Water Heater 27 kW 240 V

If you have a warm indoor environment at home, then the EcoSmart ECO 27 may be the right solution for you. It’s a tankless electric water heater that can supply your entire house with hot water on demand.

It has a great feature of self-modulating technology which helps manage the power used based on the water needs. Moreover, you can save up to 50% on your water heating bills.

This heater also has a digital screen which shows the temperature of the water and allows you to adjust the setting by 1-degree variations. The amount of hot water it provides can also vary between 2.7 to 6.5 gallons per minute. However, the exact amount depends on your incoming water’s temperature.

The heater also has a manual switch, which can come in handy during a power outage. The switch can reset the heater to its original settings.

Specs:

Width: 17
Height: 17.75
Depth: 4.25
Wattage: 240 volts

Location: Indoor

Warranty

Lifetime Limited Warranty on electronics, exchanger and element

The Bosch Electric Mini-Tank Water Heater

The Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) is a simple point-of-use water heater that can fit under your sink or can be mounted on the wall or installed floor-mounted.

It can provide hot water right as needed, eliminating the wait time and saving water and energy, with its thermal efficiency of 98% and fast recovery rate. It can supply up to 2 sinks at one time and has a premium glass-lined material to ensure a long service life.

Specs:

Width:13.75 Inches
Height:13.75 Inches
Depth:13.5 Inches
Wattage: 1440

Location: Indoor

Warranty

6 years for residential parts and labor 1 year for commercial parts and labor

Biselong Instant Hot Electric Tankless Water Heater

The Biselong Electric Tankless Water Heater is a powerful, all-purpose equipment. It can provide a substantial supply of hot water for both kitchen and bathroom use. The heater’s 12KW system heats water in seconds, with no preheating or standby losses.

It has a clever chip that changes power use tied to water flow and temperature, which can save up to 90% on electricity costs. It includes a digital screen that can display the current water temperature and a convenient adjustment knob.

The heater has a self-protection feature to prevent mineral build-up which extends its lifespan. If the water pressure is low, it can still properly function due to its startup setting.

Specs:

Width: 8.6″
Height: 2.4″H
Weight: 5.79 pounds
Wattage: 240 volts

Location: Indoor

Warranty

2 years for parts and labour

Factors to Consider When Choosing the Best Electric Instant Water Heaters

There are many factors to consider when choosing the best solution to suit your needs, such as:

The size of the heater and its capacity – this is in fact an essential factor! You should ensure that it can meet your household’s needs, taking into account the number of occupants, the number of taps, and weather patterns. The manufacturers’ guide can help you estimate the most suitable size.
The power and voltage ratings of the heater are also important factors, and should align with your current electric setup. You might need to fiddle with wires, add new circuit breakers, or install new fuses. Additionally, you should consider how much it costs to operate the heater and how energy-efficient it is.
Functions and features of the heater. Always select a heater that has an easy-to-use control panel, a digital screen, and a knob that allows heat modification. Safety features are also essential to consider including overheat protection, flame failure safety, and anti-freeze protection. Some heaters might also have additional convenient settings like self-cleaning, self-diagnostics or a remote control.
Warranty period on your heater is also important. Always check the warranty duration and what it encompasses. Make sure that parts and labor are part of the warranty agreement. Also, make sure to check out other customers’ feedback about the heater, and the convenience of communicating and interacting with the company that manufactures and installs it.

Pros And Cons Of Electric Instant Water Heaters

Here are some of the pros and cons of electric instant water heaters:

Pros of electric instant water heaters:

Instant electric heaters are eco-conscious and energy-conscious. Unlike the continuously energy-consuming traditional tank-style water heaters, instant electric solutions only need energy when a hot water tap is in use or an appliance needs hot water.
An endless hot water supply is guaranteed. As long as there’s electricity and water, instant electric water heaters can maintain a steady delivery of hot water. You no longer have to worry about “out of hot water” moments or tank refill waiting periods.
They are compact and space-saving. Electric instant water heaters are much smaller than tank-style water heaters, and can be mounted on a wall, under a sink, or even in a closet. They can be installed at an angle and in multiple locations, as long as there is access to power and water. This can free up valuable floor space and make your home more spacious and organized.

Cons of electric instant water heaters:

Electric instant water heaters are more expensive than traditional options. They cost more than tank-style heaters, considering both the price of the unit and the setup expense. An electric instant heater typically costs between $500 to $1,500, in contrast to a tank-style heater’s average price of $300 to $600.
Regular maintenance is a must. At least once a year, you need to clean and flush out the electric instant water heaters, either by following the guidelines carefully, or by hiring a skilled plumber. This ensures the removal of mineral deposits and buildup which could hinder performance and reduce the heater’s lifetime.

Conclusion

Instant electric hot water heaters can rapidly deliver substantial amounts of hot water, with no storage tank required. They’re efficient, green, small, and easy to set up. On the downside they have a high initial cost, require regular maintenance , and are vulnerable to power outages.

So, when looking for the most suitable application, make a list that checks finances, your electricity setup, your hot water needs, and your personal preferences.

This article can serve as a guide for the top 7 electric instant hot water heaters available in Australia in 2024 with respect to their features, capabilities, and overall performance.