Does it cost a lot to keep a Zojirushi water heater 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 inner pot of these water heaters are insulated therefore the energy goes into the water, no steam is produced and very little energy is needed to keep it warm. With Oyu water dispensers only the water you need to dispense is heated immediately.

It is estimated that maintaining the water temperature costs less than 7 pence per day (depending on electricity tariffs). Remember that each time you boil a kettle it costs you each time it is boiled - you are probably heating more water than you need too every time you boil your ordinary kettle and then letting it cool.

Zojirushi water heaters retain most of the energy used, therefore saving you money to use on other things!

Oyu instantly heats up your water on demand and so is even more energy efficient because you only use what you need and there is no heat having to be retained.

Here is an example of the energy usage of our water heaters compared to a conventional kettle.