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Heating element for electric resistance water heaters

Guide written by:
John, DIYer & IT developer, Brighton

John, DIYer & IT developer, Brighton

59 guides

The heating element of an electric resistance water heater is indispensable for heating water. Relying on a thermostat to start and stop them, the heating elements are either immersion or steatite (dry ceramic). Up to 3000 watts, these elements are chosen according to the volume of water to be heated.

Important features

  • Power
  • Steatite (Dry Ceramic)
  • Immersion

Heater element: immersion or steatite

Heating elements for electric water heaters come in two types: Steatite (dry ceramic) or immersion.

Steatite (Dry Ceramic)

Steatite elements mitigate the effects of poor quality water because their protective sheath limits deposits and protects the heating element.  The element housed in a protective sleeve so that it never comes in direct contact with water.

An attractive feature of the dry ceramic heating element is that if replacement is required, it can be accomplished without draining your hot water tank.

Steatite is an inert material chosen for its resistance to high temperatures and thermal shock It is also used in the design of inert radiators.


The covered or immersion elements are directly in contact with the water. If the water is hard, the element becomes gradually encased with mineral deposits and consumes more electricity because its heating capacity is reduced.

Electric immersion heaters are therefore not recommended in areas where the water is hard.

Choosing a heating element

The wattage level of the heating element is determined by the model of the storage tank and usually varies from 1200W to 3000W.

Take into account the diameter of its base which measured in millimeters like its parts for installation.

The amount of heat given off of an element depends on the volume of water to be heated relative to the size of the tank.  This is usually calculated at the standard rate of exchange.

The main brands offer after-sales service for the heating elements of their electric water heaters. Therefore choosing an element is restricted to the brand and type of water heater.  The brand name can both be found on the tank and in the user manual.

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Guide written by:

John, DIYer & IT developer, Brighton 59 guides écrits

John, DIYer & IT developer, Brighton

Since I was a child, I was always interested in manual and technical works. Always fascinated by woodworking, I took advantage of my first flat as a playground. On the cards: electricity (of course, safety first!) and some partition walls; but also decorating with the help of the missus, made-to-measure furniture and little tricks to optimise the space, all the while remaining as original as possible. When the little one arrived, I started building bits and pieces for him!

Lacking space, I have not got a permanent workshop and certain tools I dream about but are not part of my collection. Not to worry, I already know a lot about DIY and I have a high-tech profile that I hope will guide you in your decisions!

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