plural of point heater

(rail transport, UK) A heating device used in freezing weather to keep points (US: switches) free of ice and snow.

(historical) The piece of metal heated in the fire for a box iron.

plural of iron heater

(military, mechanical engineering) A type of torpedo engine, powered by the burning of fuel with compressed air or oxygen, which does not inject water into the combustion chamber for engine cooling and extra power.

(military, mechanical engineering) A type of torpedo engine where water is injected into the combustion chamber alongside fuel and compressed air or oxygen, cooling the engine and increasing its power through the production and expansion of steam.

plural of wet heater

plural of dry heater

plural of storage heater

An electrical heater which stores thermal energy during the evening or at night when electricity is available at lower cost, and releases the heat during the day as required.