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Oyu by Yum Asia (4 litre) Instant Hot Water Dispenser (YUM-OYU4)


  • Featured in 'Best Instant Hot Water Kettle 2019' awarded by T3
  • 220-240v, 50hz with 3 pin UK plug
  • 4 litre capacity
  • Cool and stylish white, modern exterior
  • Instant hot water (3 to 5 seconds heat up using Yum Ecoboil)
  • Ultra modern and hygenic touch LED ‘hidden under’ control panel display
  • Large illuminated dispense button for easy pouring of hot water
  • 'Steady Stream' flow mechanism technology to ensure no splashing
  • High flow mechanism, can dispense up to 500ml in one touch
  • Dispenses variety of temperatures – ambient to 99°C (5° intervals)
  • Anti scalding safety lock with rate limiting dispense
  • Removable water tank for easy cleaning


What Makes Oyu Special

Special Introductory Offer of £99 (RRP £159)

The main disadvantage to ‘traditional’ electric water heaters is that they use a lot of energy keeping a tank full of water at the correct temperature for use, usually having to reboil at intervals to get the water to the temperature you want. Traditional kettles are very inefficient due to having to boil more water than required and a lot of the heat from the boiling water being lost due to inadequate/non-existent insulation on the kettle. We then looked at Japanese water heater technologies, learned exactly how they work and their best and most useful features and found that whilst vacuum technology to keep water hot and on demand was good it was not as energy efficient as on demand ‘instant’ water heating. Oyu Smart Instant Hot Water Dispenser is the answer to all of these issues.

Oyu Smart Instant Hot Water Dispenser is a unique, stylish and modern water dispenser that allows you to enjoy fresh and safe hot or cold water instantly in your home or small office. With a 3 second rapid heat, it really does give the convenience of boiling water available at the touch of a button. This means that you can enjoy the convenience of drinks at the exact temperature you want (ambient to 99°C), only heating the exact amount of water that is needed, thereby saving energy and (most importantly!) money.





Oyu’s Features And Functions


Oyu is an Instant Hot Water Dispenser. It has unique technology that allows you to enjoy water at a wide range of temperatures with a 3 second rapid heat system to ensure your cup is filled fast. 

Equipped with a modern touch LED display for easy use and hygiene is cleverly hidden under the intuitive control panel. You can adjust the temperature, volume and dispense with the touch of a button. The memory can also hold the last temperature and volume dispensed to make brewing your favourite drink even easier!

Oyu has special ‘steady stream’ technology which means that during the water dispensing, any splashing is minimised, so there’s no chance of accidental splashes on you or your worktop.   

The temperature range of Oyu ranges from ambient (minimum temperature of 4°C). You can adjust the dispensing water temperature by 5°C up to a maximum temperature of 99°C. This means you can set your water temperature to whatever your beverage is suited to.
Due to the smart insta-heat dispensing water at your chosen temperature, Oyu is the most energy saving water heater that we sell. You are only dispensing and heating the exact amount of water you require, whereas with a kettle you often boil a lot more than is needed, wasting both money due to overconsumption of energy or heat from the inefficient/non-existent insulation on a kettle. It saves energy compared to conventional water heaters because you aren’t keeping any water warm, you are just heating as it’s needed.

Oyu is equipped with a unique Yum Ecoboil system which means it gets the water you are dispensing to the correct temperature fast to ensure the beverage you are brewing is fresh and hot.

Product Specifications
Capacity 4 litre capacity
Design Cool white exterior
Power 220-240v, 50hz with 3 pin UK plug, 2100W
Power consumption Power consumption during standby - 0.05kWh (per 24 hours)
Boil time for water Takes 1 minute to dispense a cup of boiling water
Dimensions (L x W x D) 36.2cm x 16cm x 29.4cm

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We often get asked questions about the products we sell, here is a selection of the questions which customers most often ask us.

Does this Oyu instant hot water heater work with UK or European power?

Yes. This water heater is factory made for UK and European 220-240v, 50hz power supply.

What plug/power cord is this product supplied with?

This water heater is supplied with a 3-pin UK plug. However, if you live in Europe you can easily purchase an adapter plug. Please note that this product does not have a detachable power cord.

Where is this water heater made?

Oyu is manufactured in a dedicated Chinese factory. Our factory conforms to the highest international standards and has comprehensive quality control and manufacturing procedures which we have had independently inspected.

Does it cost a lot to keep Oyu on all the time?

No. A lot of the energy in a traditional kettle is wasted because of poor insulation, as water is converted to steam before it switches off. There is also excess water which is heated and left in the kettle but not used - most people overfill their kettles. The Zojirushi water heaters we sell also have to store and keep water at a specific temperature, thereby using energy.

Oyu only heats the exact amount of water you want and dispenses it thereby saving energy and, most importantly, money.

General information

Oyu requires a short period of ‘bedding in’

Please note that Oyu has a very special type of heating element and you may find that it takes a week of use to properly ‘bed in’ and reach the correct temperatures. If your boiling water doesn’t seem hot enough when you first receive your Oyu, it’s not a fault, this is the reason and with more use the water temperature will become hotter.

Plastic smell

The first thing to note is that all new appliances have a plastic smell or taste at first. As the products we sell are very new (less than 2 months from manufacture to dispatch from our warehouse) there is inevitably a smell or slight taste of plastic; usually most products sit in a warehouse for at least double that time so the smell/taste tends to dissipate. If you want to speed the removable of any smell, put vinegar with hot water into the tank (follow the cleaning guidance amounts for how much vinegar to use) and leave this overnight. Then dispense and follow the rest of the cleaning instructions for cleaning through the vinegar. Vinegar is excellent for getting rid of plastic smells, another alternative is baking soda. This is common amongst many appliance manufacturers as being a solution for this type of issue.

Unique And Stylish
Find Out More About Oyu

Quick heating, perfect functions and ultra cool styling 

Oyu has a large 4 litre removable water tank that is convenient to keep filled, is perfect for the average home or even office and easy to keep clean and fill up. Unique to Oyu is our high-flow mechanism, which means that you can fill up cups or other containers more quickly and, unlike other instant hot water dispensers on the market, our ‘steady stream’ technology ensures less spluttering or splashing of hot water on your worktop. Producing near-boiling temperatures for preparing coffee, tea, soups or other instant or hot meals, the one-button control is easy to use, and has an anti-scalding feature to prevent accidental dispensing of hot water.

It’s styling and contemporary cool white appearance will match many homes or offices and bright LED touch panel display is easy to use, clean and hygienic and uses hidden under panel display technology so you don’t see where the led display is located whether Oyu is turned on or off. The only maintenance required is to descale the interior of the water tank at intervals (full instructions for descaling are provided in the instruction manual) and just requires simple citric acid cleaner like a traditional kettle or coffee maker.