Best tankless water heater 2021

Which is the best tankless water heater in Australia?

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The 10 best tankless water heaters to buy in Australia

The top 10 list of the best tankless water heaters lists various brands and prices

Review10Best compares the best tankless water heaters in Australia and selects the one by Ecosmart as the best tankless water heater. In a tankless water heater buying guide, you can read more about the features of the different tankless water heaters and see a recommendation on which tankless water heater to buy in Australia in 2021. By considering the top list of tankless water heaters, you can find the best tankless water heaters and save time shopping online.


Table of contents

  1. Read the ultimate tankless water heater buying guide
  2. View the tankless water heater picks and see how they rank in the top list

SEE THE TOP 10 LIST →
(skip buying guide)


Best tankless water heaters: A complete buying guide

All you need to know before buying a great tankless water heater

Picture of a tankless water heater

Finding the best tankless water heater system for your home can help save a lot of money in energy bills, although knowing what to look for in a heating system can be challenging for anyone that isn’t a plumber. Given the cost of paying for a new heating system, you will want to put a lot of thought and consideration into your decision, which is not always easy if you are unfamiliar with what a tankless water heater is and how to choose the right one for your home.

To help with this, we have created a handy buying guide that covers all the information that you need to know to find the best tankless water heaters for your home.

What are tankless water heaters?

As the name suggests, a tankless water heater is a type of water heating system that does not use a large water tank to store heated water. Instead, cold water passes through a pipe and into the heating unit, which uses either a gas burner or electric element to instantly heat the water. Whenever you turn on hot water, you instantly get a constant supply as there is no need to wait for a tank to fill with heated water. Therefore, a good tankless water heater makes hot water very convenient and energy-efficient.

Why should you buy a good tankless water heater?

One of the major benefits of using tankless water heaters is reduced energy consumption. Because there is no tank to fill and store with hot water, it can help to reduce water heating bills. Furthermore, while the initial cost of installation is higher than a tanked water heater, the best tankless water heaters are much more durable so will last significantly longer. This means you can save money over the long term, making it a fantastic investment for many homeowners.

Another picture of a tankless water heater
How to choose the right tankless water heater?

Choosing a new tankless water heater can be daunting for those unfamiliar with water heating systems. So here are some things to consider that can make the process easier:

  • Hot Water Consumption: You need to determine how much hot water you consume daily so that you can select a tankless water heater that meets the demand. Simply list all the fixtures in your home that use hot water at any time (e.g. faucet, shower head, dishwasher) and combine their flow rates. To check flow rate, simply refer to the manufacturer instructions for any fixture you’ve bought or check online for a rough estimate of each fixture.
  • Temperature Rise: This refers to the temperature that the heater uses to warm incoming water to the desired temperature. To calculate, you need to determine the average temperature of incoming water and subtract from the desired incoming temperature.
  • Power Source: A tankless water heater is either gas-powered or electric, so consider which is best for your needs. Electric is suitable for smaller water heaters designed for point of use (e.g. heating water for just the shower), while gas-powered water heaters are best for an entire household’s water heating.
What is the best kind of tankless water heater in Australia?

There are two main types of tankless water heaters available to buy:

  • Gas-powered Tankless Water Heaters: Gas-powered systems are more powered and the most used, being the best tankless water heater for an entire household. However, you need to ensure that appropriate piping is in place and consider its location relative to where the heater will go, otherwise extensive installation work may be necessary.
  • Electric Tankless Water Heaters: Electrically powered systems are only recommended for point of use rather than a whole household, as it puts too much strain on the electrical supply when forced to heat too much water. It is more affordable to install, however.
…are you ready for the best picks of 2021?

Top 10 list of tankless water heaters in Australia (November 2021)

The bestseller list compares brands and their tankless water heaters. Which tankless water heater is the best?
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Best choice* TOP 1
Image of Ecosmart ECO 18 tankless water heater
Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology*
  • Copper and stainless components
  • Manufactured in China
  • The product is easy to use
BUY NOW*
TOP 3
Image of Stiebel Eltron 230628 tankless water heater
Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use Tankless Electric Water Heater*
  • Due to its small dimensions and attractive housing the DHC-E can be left unconcealed…
  • The three years parts warranty is unique in the industry
  • Set the knob on the front cover and enjoy water temperatures between 86DegreeF (30DegreeC)…
BUY NOW*
Offer* TOP 4
Image of CAMPLUX ENJOY OUTDOOR LIFE BW158G tankless water heater
Portable Water Heater,Camplux Tankless Water Heater Propane,1.58 GPM On Demand Water Heater,Outdoor Gas Water Heater,Gray*
  • 6-in-1 Protection Ensures Safety-Flame failure device, anti-freezing protection,…
  • 3.0 PSI Water Pressure Startup -The portable propane water heater equipped with a…
  • Compact Size, 14lbs Portable Design- Weights 14 lbs, this 6L portable water heater…
BUY NOW*
TOP 5
Image of FORUEE  tankless water heater
Portable Propane Tankless Water Heater, 1.32GPM/5Litre Capacity, 6-IN-1 Multiple Protection, 7 More Usage Scenarios, Low Pressure Startup, Black*
  • LOVE ENDLESS HOT SHOWERSOther tankless water heater on the market have limited support…
  • 6-IN-1 MULTIFUNCTIONAL SAFETY PROTECTIONPassed UL-307B Safety Test and FDA Food Contact…
  • EASY TO INSTALL LOW PRESSURE STARTUPJust need 2.5PSI of water pressure, No electricity…
BUY NOW*
TOP 6
Image of MAREY GA5FLP tankless water heater
MAREY GA5FLP 1.32 GPM, 34,120 BTU's LP Gas Flow Activated Tankless Water Heater, White*
  • FEATURES: 1.32-GPM heater is activated by water flow rather than water pressure;…
  • TEMPERATURE CONTROL: Ideal for indoor use in apartments, cabins, and tiny homes;…
  • AUTOMATIC SHUT-OFF: Multiple safety sensors, such as auto cut-off, automatic ignition,…
BUY NOW*
TOP 7
Image of Water Heaters WH7 tankless water heater
Water Heater Parts & Accs Rinnai H98-510-S Tankless Water Heater Inlet Screen Assembly*
  • Water Heater Parts & Accs Rinnai H98-510-S Tankless Water Heater Inlet Screen…
BUY NOW*
TOP 8
Image of MAREY GA10LP tankless water heater
GA10LP Marey Power Gas 10L 3.1 GPM Propane Gas Tankless Water Heater*
  • Unlimited hot water whenever is needed.5-year.Allows water temperature to be controlled.Rustproof,…
  • No electrical connection is required so it's perfect alternative for those homes…
  • Compact design saves space and is easy to install almost anywhere
BUY NOW*
TOP 9
Image of Girard Prod 2GWHAM tankless water heater
Girard Prod 2GWHAM Tankless Water Heater*
  • Included components: girard 2gwham on-demand gswh-2 tankless rv water heater
  • 12V power operates at less than 3 amps
  • Quiet brushless motor
BUY NOW*
TOP 10
Image of Can You Actually com.amazon.rialto.cordova.webapp.webappd107833b2e2843e988dd8b35f748cd94 tankless water heater
Tankless Water Heater Review Guide*
  • Consumer reviews
  • Comparison charts
  • How to choose the right water heater
BUY NOW*
Affiliate Disclosure

* We participate in the Amazon Associates Program. As an Amazon Associate we earn from qualifying purchases. For the list of the best tankless water heaters, we consider only products that are available on Amazon while the ranking is based on factors such as customer reviews, number of sales and keyword. It is not a tankless water heater test. Last Update: 2021/11/27.