(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.

plural of quartz heater

A portable electric radiant heater consisting of elements sealed in quartz glass tubes which produce infrared radiation in front of a reflective backing.

An appliance for heating water above its ambient temperature, generally for domestic use.

A portable heating appliance used to warm an area or room.