Zojirushi Water Boiler CV-DCC40XT Review

The Zojirushi 586361-CV-DCC40XT VE Hybrid Water Boiler And Warmer, to give this product its full name, is the replacement product for the incredibly successful CV-DSC40 VE.

The Zojirushi Water Boiler And Warmer 586361-CV-DCC40XT VE Hybrid, to give this product its full name, is the replacement product for the incredibly successful CV-DSC40 VE. You can read our review of the CV-DSC40 by clicking here (opens in a new tab).

Both of these products give you the convenience of instant hot water of a pre-determined temperature at the touch of a button. Invaluable if you enjoy drinking specialist teas, and extremely useful if you are a regular coffee drinker.

So why did Zojirushi decide to produce a replacement for their original water boiler and warmer?

Read the rest of the review below to discover the reason, and much else besides:

zojirushi water boiler

Table of Contents
Improvements on DSC40Better than a Kettle
What's a "Hybrid"?Early Morning Brews
Cleaning & MaintenanceFeatures & Specs
AccessoriesPros and Cons
Consumer RatingsSummary

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What Distinguishes The Zojirushi Water Boiler CV-DCC40XT From The CV-DSC40?

This products predecessor, the Zojirushi CV-DSC40, was incredibly popular. It still is if you can get hold of one. However, there was one thing about it, in common with nearly every other water boiler on the market, that many reviewers disliked. And Zojirushi listened.

In order to produce water at a set temperature, the CV-DSC40 always boils it first. That in itself doesn't take long. But it does take a while for the water to cool down to the set temperature. If that was set at anything less than the maximum of 208 degrees then it could be quite a long time.

The Zojirushi Water Boiler CV-DCC40XT overcomes that problem. Its Quick Temp mode enables it to heat up water to the desired temperature without boiling it first. This can save an incredible 6 hours if you're heating water to 160 degrees, for example to make some delicate Japanese tea. Even if you're heating it to 195 degrees you'll save up to an impressive one and a half hours (depending on the ambient temperature).

This setting also saves energy consumption (and therefore money as well) and cuts down on the emission of steam. There are circumstances where you may want to boil your water before consuming it. These include where you are feeding a baby or where de-chlorination of the water is necessary. Even here you can still use Quick Temp if your water is bottled or purified.

Just one other thing to mention here. The CV-DCC40XT is available in capacities of 4 liters and 5 liters. 4 liters is ample for most users, but if you anticipate heavy usage, eg in an office, then the larger size is for you.

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Is The Zojirushi Water Boiler CV-DCC40XT Really So Much Better Than A Kettle?

The point about a water boiler and warmer like the Zojirushi CV-DCC40XT is that you have a supply of water of a pre-determined temperature on demand. And there is a digital readout showing the actual temperature of the water available in real time.

A kettle can't do that. All it does is heat water up until it's boiled, unless you switch it off beforehand, but if you do that you can't know what the temperature is. The DCC40XT's pre-set temperature options reflect the demands of tea and coffee drinkers. Tea drinkers will probably outnumber coffee drinkers in using this product to its full potential, but there's a strong argument for saying that everyone needs a water boiler and warmer in their kitchen.

The temperature options themselves are 160, 175, 195 and 208 degrees (and there is a straight boil setting). 160 is for high quality, delicate green teas, 175 is for various green teas, such as bancha, houjicha, or genmaicha, 195 is for oolong tea and white teas. Coffee drinkers will invariably use the 208 setting, also suitable for black, herbal and pu-erh tea and instant noodles. This latter setting can reduce energy consumption by up to 28% compared to boiling water and then letting it cool to 208.

Even the power cord is made so as to detach from the body very easily - rather that than risk you catching or tripping over it and sending the machine, hot water and all, flying. Auto-shutoff kicks in with the "HH" setting if there's any danger of accidental damage, eg through the water level being too low. The Zojirushi Water Boiler CV-DCC40XT really is so much more than just a kettle.

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zojirushi water boiler

What Exactly Is A "Hybrid" Water Boiler and Dispenser?

It's easy to be blinded by science when reading the manufacturer's description of this product. Let's just take a minute to go over what the various terms mean.

The "VE" in the full title of the CV-DSS40XT refers to "Vacuum-Electric". This is the "vacuum insulation technology", another term that, together with "hybrid keep warm system" and "Vacuum Insulated Non-Electric Keep Warm", will mean very little to most people.

It's quite simple - they all refer to using both electricity and vacuum insulation to heat the water and then keep it warm for extensive periods. Zojirushi have used a stainless steel double insulation wall, including a layer of vacuum insulation, to keep the water hot with very little power consumption. In itself it's no more complicated than the technology behind a vacuum flask.

The practical benefits are that this product can rapidly heat water to a pre-determined temperature with precision, and keep it at that temperature for as long as you want. Without relying completely on electricity, and all at the touch of a button.

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What About Early-Morning Brews?

It's all very well having water at a constant temperature any time you want it, but how long does it take to get there? That's assuming you don't want to spend money keeping your water warm all night as well as all day. After all, any water boiler and warmer has to heat the water to above the desired temperature and allow it to cool. This is in order to ensure that all the water in the tank is heated to the same temperature.

The answer to that little problem is in the "Energy Saving Timer Function". This is a setting whereby you can shut off power to the heater, for example overnight, and have it come on again. This timer can be set for every hour between 6 and 10 hours from the time you set it. So you can set it before you retire for the night, and have it come on an hour or so before you rise. Your water will be at the required temperature as soon as you're ready for your morning brew.

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How Often Do I Have To Clean and Maintain It?

As with any technological product, it's important to fully read and understand the User's Manual (downloadable from the manufacturer's site or from Amazon). This can save you no end of time and frustration by avoiding problems later on.

The Zojirushi Water Boilere CV-DCC40XT is very easy to clean. It has a clear-coated stainless steel body which just wipes clean with a damp cloth. The inside of the water tank is of a non-stick coating made of PTFE, which is a fluoropolymer, a material commonly used for nonstick coating in cookware for conventional kitchen use. It will need a clean every couple of months or so, depending on usage. You do this by simply putting a couple of tablespoons of citric acid in the full tank of water and boiling it.

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Features and Specifications:

Product Dimensions: 8.8 x 11.1 x 13.9 inches
Item Weight: 7 pounds
Shipping Weight: 8.35 pounds
Manufacturer: Zojirushi America Corporation
Item model number: CV-DCC40XT
Temperature settings: Quick Temp settings of 160, 175, 195 and 208 + 212 (boil)
Timer settings: 6 - 10 hours in whole hours
Choice of Capacity: 4 liters or 5 liters
Additional features: carry handle; magnetic, detachable power cord

Get more information and buy it now on Amazon >>>
zojirushi water boiler


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Pros and Cons of the Zojirushi Water Boiler CV-DCC40XT


  • Quick Temp setting saves time and money
  • Timer function - set it to come on 6-10 hours ahead (e.g. early morning)
  • Auto shutoff prevents accidental damage
  • Convenience - swivel base, carry handle, detachable power cord
  • Four temperatures to choose from, plus boil


  • Water pump can slow if the unit needs cleaning
  • Alert to indicate water is ready is annoying music clip (can be changed to silent or single-beep option)
  • The water temperature can be a little less than indicated when it is dispensed

Watch this useful YouTube Video of the Zojirushi CV-DCC40XT in action -

Consumer Ratings for the Zojirushi Water Boiler CV-DCC40XT

There is a very high level of satisfaction with this product among reviewers. On Amazon.com over 500 reviewers have awarded an average of over 4.5 stars, as at the time of writing (May 2019). Especially popular is the Quick Temp setting that allows the unit to heat your water up to the desired temperature and then stop.

Another feature that saves energy and is very popular is the vacuum layer, which means that the product uses less energy keeping your water warm.

Durability, convenience and the ability to choose between different temperatures plus boil are other factors that have led to this high rating.

Some reviewers have complained about worn down Teflon or other deposits forming on the bottom of their water boiler. It's not Teflon (which is stable up to around 600 F - far above the temperature to which the DCC40XT can heat) or anything else harmful, but simply mineral deposits from the water. These can be dissolved and washed away with the use of citric acid, as mentioned above.

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zojirushi water boiler
How the vacuum insulation works


Zojirushi are renowned for the quality of their products, and the CV-DCC40XT is no exception. In this product they've combined great style with rugged durability and overcome the only major complaint about its predecessor, thanks to its Quick Temp setting.

Whilst tea-drinkers may arguably get more benefit from having this product on their kitchen work tops, coffee drinkers, too, will benefit from the convenience of having water of exactly the required temperature readily available at the touch of a button.

And once you've bought your Zojirushi water boiler CV-DCC40XT you can be pretty sure you won't have to replace it for many years.

For current pricing information on Amazon, follow this link>>>

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Zojirushi Hybrid Water Boiler and Warmer Review

The Zojirushi CV-DSC40 VE Hybrid Water Boiler and Warmer has now been replaced by the Zojirushi CV-DCC40XT VE Hybrid Water Boiler and Warmer, but is still available through Amazon from private sellers. You can read our review of the Zojirushi CV-DCC40XT by clicking here.

The CV-DSC40 VE is proof that you really can re-invent the wheel and sell it at a higher price. Provided, of course, that you add a whole lot more value. And give people the extras that they didn't realize they needed until now. It takes what an ordinary kettle does - boil water - and turns it into an art form. That is, a practical system for solving a lot of life's little problems. Problems that we never knew we had until we saw what it can do for us.

Zojirushi Hybrid Water Boiler

Table of Contents
All Kinds of Hot WaterUsing It - And Fast
Solid Build and DesignKeeping on top of the Cleaning
Safety AspectsFeatures & Specs
Pros and ConsConsumer Ratings

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All Kinds of Hot Water for a Wide Variety of Uses

What can this Zojirushi Hybrid Water Boiler and Warmer give you that an ordinary kettle cannot? The answer is water of whatever temperature you need, whenever you need it.

The Zojirushi CV-DSC40 boils your water for you, and then lets it cool to just the temperature you want, and no lower. The pre-loaded defaults are 175 degrees (appropriate for green teas), 195 degrees (for oolong and white teas), and 208 degrees (for coffee, instant noodles, and black, herbal and pu-erh tea).

The control panel displays the temperature of the water in the reservoir at all times, and you can control it to whatever you want through the computerized control system.

So what is it that you want this device to help you prepare? Coffee and tea of all kinds, soups, noodles, oatmeal - you can prepare all of these easily with water from this hybrid water boiler heated to exactly the right temperature.

You can find countless other uses for it as well, such as warming baby bottles and blanching vegetables. Once you get it in your kitchen you'll never be lost for ways in which to use it.

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This Zojirushi Hybrid Water Boiler is a delight to use - and so fast

Who would have thought that a utility that is basically a kettle could be such fun to use? At the touch of a button, you can re-boil the water or re-set the current temperature. You'll hear an audible beep when the water has boiled, or when the water level in the container has dropped below the minimum level.

It boils as fast as a standard kettle, taking from 7 to 15 minutes to boil a full 4 liters straight from the tap, depending on the temperature of the tap water and the kitchen conditions. Boiling a full container starting from 195 degrees takes about 4 minutes.

Many users use the six- to ten-hour timer feature to have the water heated for their morning tea or coffee when they awake. Just set it for when you want your hot water and this Zojirushi hybrid water boiler does the rest.

Get more information and buy it now on Amazon >>>

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Solid Build - But What About The Design?

The driving force behind this machine is a comfortably sized 840 watt water boiler. The water container is vacuum insulated and is able to accommodate 4 liters. The exterior is clear-coated stainless steel that looks good in any kitchen. All materials used in its construction are BPA-free.

Inside, the interior is also stainless steel with an anodized coating, probably Teflon. It conceals the heating element, which doesn't come into contact with the water. Some gaskets and the outer lid are plastic. If and when they suffer from the daily punishment meted out to them, they can be easily and cheaply replaced.

The water level gauge is not only sleek-looking, but on account of its wrap-around design you can easily read it from almost any angle.

The base is on a swivel, so it's easy to orient in any direction. And, being made in Japan, this product is pure quality. It carries a one-year limited warranty from Zojirushi.

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Keeping On Top Of The Cleaning

Any device that deals with boiling hot water every day is liable to suffer from the mineral deposits that come with that water, as well as the tremendous forces of expansion and contraction that come with extreme temperatures.

But the non-stick coating of the container ensures that this water boiler can cope with it all without many problems. Of course, you have to boil a couple of container-fulls and discard them when you first use the machine, to expel any impurities left over from the factory, but after that you only need to clean it occasionally. Zojirushi supply their own cleaning powder for the purpose - there's an instructional video on Amazon's page.

Click here for some great tips on how to clean a coffee maker (opens in new tab). Using filtered water goes a long way towards keeping the interior clean enough to make the cleaning chore a rare event.

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Safety Aspects of this Zojirushi Hybrid Water Boiler

Safety is paramount when a device regularly dispenses hot or boiling water. The power cord is just 3 feet long and detachable (as well as magnetic). It easily comes out of the socket if accidentally caught or knocked, rather than risk having the whole device, hot water and all, become mobile and out of control.

To pour the hot water you need to press the Unlock button and then the Dispense button, just to ensure that a responsible adult is doing the dispensing, and not, for example, a small child. And, of course, it has auto shut-off.

Here's a short video showing how the Zojirushi CV-DSC40 VE does its job:

Features and Specifications:

  • Product Dimensions: 8 x 11 x 14 inches ; 9 pounds
  • Shipping Weight: 7 pounds
  • Item model number: CV-DSC40
  • Vacuum electric hybrid system
  • Water container capacity: 4 liters
  • Temperature setting and control system
  • 6-10 hour timer
  • Digital control panel
  • Audible beep for boiling completed or low water
  • 840-watt boiler
  • Stainless steel exterior
  • Auto shut-off
  • Warranty: 1 year limited

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Pros and Cons of this Zojirushi Hybrid Water Boiler


  • Computerized temperature control and settings
  • Massive 4-liter capacity water container
  • Heats the water and keeps it at pre-set temperature
  • Stainless steel build
  • Easy to clean


  • Always boils the water before letting it cool to the desired temperature
  • Rather pricey

Get more information and buy it now on Amazon >>>

Consumer Ratings

Over 540 users on Amazon have reviewed this product at the time of writing (February 2019) and awarded it an average of over 4 stars. They particularly love its speed, convenience, ease of use and safety, as well as its good looks.

The only real bone of contention relates to the way in which it always boils the water before leaving it to cool to the desired temperature, a process that can sometimes take a while.

It may be something that Zojirushi can address when they update this model, so it simply heats the water to the new required temperature and no more. [NB Zojirushi have already updated this model - see the opening line of this review.] Nevertheless, this doesn't seem to trouble the vast majority of users.

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Zojirushi are a Japanese company and this product is made in Japan. This is reflected in both the design and the quality of it.

For convenience, ease of use, build quality and design, as well as safety, it would be very hard to imagine any other similar product coming close to the Zojirushi CV-DSC40 VE Hybrid Water Boiler and Warmer. We believe we can recommend this product to you without any hesitation.

'Coffee Lover'

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