immersion heater

American  

noun

1. a small electric coil used to heat a liquid, as a cup of water, in which it is immersed.

---

immersion heater British  

noun

1. an electrical device, usually thermostatically controlled, for heating the liquid in which it is immersed, esp as a fixture in a domestic hot-water tank

---

Etymology

Origin of immersion heater

First recorded in 1910–15

Example Sentences

However, you also need to factor in the costs of removing the existing central heating system and investing in an electric immersion heater for hot water.

From BBC • Feb. 4, 2023

In homes that use exclusively electric wallpaper, this can be provided by an electric immersion heater.

From BBC • Feb. 4, 2023

The man, aged in his thirties, had been rationing his electricity by using his kettle to bathe - turning on the immersion heater for a shower just once a fortnight.

From BBC • Mar. 6, 2022

Electric kettles had been experimented with since the 1890s, but the first kettle with a submergible immersion heater inside it was manufactured by the Swan Company in 1922.

From BBC • Feb. 7, 2013

One night, when Arthur was expressing bafflement at what was wrong with the immersion heater I asked him how long he'd been a plumber.

From The Guardian • Feb. 4, 2011