Best tankless water heater 2022

Which is the best tankless water heater in the UK?

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The 10 best tankless water heaters to buy in the UK

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

Review10Best compares the best tankless water heaters in the UK and selects the one by CO-Z 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 the UK in 2022. 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


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 the UK?

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 2022?

Top 10 list of tankless water heaters in the UK (June 2022)

The bestseller list compares brands and their tankless water heaters. Which tankless water heater is the best?
Best choice TOP 1
Image of CO-Z  tankless water heater
CO-Z LPG Hot Water Heater, 16L 32KW Instant On-Demand Boiler, Stainless Steel Tankless Gas Water Heater, LED Display Liquefied Petroleum Propane Water Heater
  • Application and Notes – This compact water heater is perfect for the use of…
  • Various Protection Measures - With flame failure-, anti-freezing- and overheating…
  • Low Start Water-Pressure - The heating function can start under low water pressure…
Image of CAMPLUX ENJOY OUTDOOR LIFE AY132 tankless water heater
Camplux AY132 Tankless Propane Gas Water Heater White 5L
  • PLEASE NOTICE - We provide a 37mbar CE approved gas regulator (in red) for quick…
  • EASY TO INSTALL & USE- The portable water heater is equipped with a folding handle…
  • MULTIPLE PROTECTION- Flame failure protection, overheat protection, oxygen depletion…
Offer TOP 3
Image of Z ZELUS  tankless water heater
Z ZELUS 18L LPG Hot Water Heater 36KW Stainless Steel Liquefied Petroleum Propane Water Heater Instant On-Demand Boiler LED Display Tankless Gas Water Heater (18L)
  • Application and AttentionThe portable hot water heater suit for the household, offering…
  • Low Water-Pressure StartupThe water control linkage valve makes the heater start…
  • High Efficient Energy SavingCompact and light weight structure with 11.5% energy…
Image of CAMPLUX BW264C tankless water heater
Camplux BW264C Tankless Gas Water Heater with Rain Cap, CE Certified GAR Standard 10L Instant Propane Gas Shower, Use for Camping RV Trip Washing Horse
  • PLEASE NOTICE - We provide a 37mbar CE approved gas regulator for quick installation…
  • EASY TO INSTALL & OPERATE- Camplux 10L gas shower comes with most of the necessary…
  • WEATHERPROOF RAIN CAP- Equipped with a rain cap, it is easily installed outdoor…
Image of EUNEWR TP01144-WML tankless water heater
Mini Electric Water Heater, 3000W Instant Tankless Hot Water Heater with LCD Display, Under Sink Water Heater for Kitchen Bathroom Washing (White)
  • LCD Digital DisplayThe temperature sensor transmits the temperature in real time,…
  • Easy InstallationThe package includes an installation manual and it is very easy…
  • Safe and DurableThis instant water heater is made of high quality stainless steel…
Image of ThermaQ Touch 3.5KW tankless water heater
Instant Mini 3.5kw Tankless Electric Water Heater Under Sink Touchscreen for Tap Bath Shower Kitchen Basin Domestic Handwash Instantaneous
  • Dimensions 198x160x98mm
  • Adjustable from 30 - 55c via push button - The heater is more effective at lower…
  • A rated
Image of Pssopp  tankless water heater
Electric Water Heater, 3000W Mini Tankless Instant Hot Water Heater with LCD Display for Bathroom Kitchen (White)
  • WELCOME TO CONTACT US---If there is a problem, please contact us first, and we will…
  • MINI WATER HEATER--- Stainless construction with mini design, it is durable, elegant…
  • SAFE PROTECTION---Anti-leakage protection, IPX4 anti-splash protection, anti-dry…
Image of Weiyiroty Weiyirotymfyazxo9bv-02 tankless water heater
Electric Tankless Water Heater, 220V 3000W Mini Tankless Instant Hot Water Heater Bathroom Kitchen Washing with LED Indicator Light, Rust Proof, Corrosion Resistant(White)
  • Stainless construction with stylish design, it is rust proof, corrosion resistant,…
  • LED indicator light to show you the power and heating status
  • Build-in turbo heating part and the blow off valve for safe heating system
Image of Unknown 222387 tankless water heater
Aeg PinControl 222385 Hydraulic Tankless Water Heater Dogs Carrier Bag, 222387
  • Pressure controlled safety device
  • 4 output stages-2 can be selected manually, 2 switched hydraulically
  • Hydraulic instantaneous water heater with mechanical function for maintaining constant…
TOP 10
Image of WMLBK P-144 tankless water heater
Instant Electric Water Heater,Mini Electric Water Heater for Kitchen 3000W Tankless Fast Heating Water Heater Anti-Leakage Protection, IPX4 Splash-Proof Water Heater (White)
  • [Wide Range of Applications]Standard international G 1/2" pipe connection in…
  • [LCD Digital Temperature Display]The water heater has an LCD screen for clear visibility…
  • [Instant Hot Water]Water heater with 3KW heating system, tankless electric water…
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: 2022/06/30.