Select Onix, by Thermor, to benefit from the perfect integration of a space & energy saving water heater with premium flat design

Onix is a flat and efficient water heater, with smart electronic controls. They provide a perfect comfort and energy savings (by up to 20%). Reliable and resistant to aggressive water, Onix is fitted with the fist double Steatite heating element for a long lasting service!

Select Onix if...

… You are looking for space saving yet powerful and long-lasting, electric water heater that will make you achieve energy savings.

With Onix, benefit from:

Onix: Smart flat and multiposition electric water heater with double steatite heating element | Thermor heating

The cutting-edge technology and long expertise of a renowned French brand such as Thermor.

With Onix, get all the hot water needed for your whole family instantaneously!

Thanks to its diamond-quality enamel and double Steatite and heating element, your water heater has a maximum working lifetime without failing.

Onix is very convenient to use with its user-friendly digital control panel. It gives easy access to the integrated smart control function: a smart system learning consumer habits through the weeks, allowing generating energy saving with no compromise on comfort. It also gives easy access to the Boost function, providing 1extra shower in less than 30 minutes.

Multi-position and with a flat design, Onix fits perfectly into any home, even in confined spaces. It is safe to operate because fully IP 24 compliant, the European standards for electrical safety and user protection.

With high density insulation foam, electronic thermostat and smart functions, more hot water is available, while increasing money and energy savings.

In addition, Onix is environmentally friendly due to its CFC-free foam.

Onix meets your needs and provides a durable comfort without trouble, even your family. It is a smart option for your water heating needs.


For going further, main technical features

  • Model and installation: Multi-position wall mounted.
  • Capacity range: From 30 to 100 L.
  • Power range: From 1000 to 2250 W.
  • Extra life-time of the heating element thanks to Double tank Steatite technology: double ceramic dry heating element, adapted to highly mineralized, hard or desalinated water

        Onix control panel | thermor heating

        How to install your Onix water heater?

        Please refer to the installation manual.

        Installation must comply with the standards currently enforced in the country of use.

        Onix is easy to install for any handyman with the appropriate tools (hand drill, screwdrivers...).

        In case of doubt, it is recommended that the installation be conducted by a certified professional.

        Francis and Liliane, Bordeaux: “We can't believe how easy it was to install Onix into our small bathroom. Now we can all enjoy long showers and still manage to achieve energy savings! We made a great choice in selecting Oniox as our water heater”.