Question

explanation of room heater in science fair within 800 words quick please
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Answer 1

Room heaters are used to heat the small space of the room. It's a reversible air conditioner.

Room heaters are convenient appliances that provide focused and localised heat which is particularly suitable in a room for people that are elderly, ill or with limited mobility. But they can be expensive.

They consume a lot of gas or electricity if used to heat up a space quickly, and are likely to cost a lot more than a central heating system.

Ideally, room heaters should only be used as a secondary or supplementary source of heat. Even then, you should use the right heater for the space you want to heat, and carefully control the temperature and the time you have the heater on. Heaters that have these controls are often cheaper to run.




A basic room heater works by heating some kind of element (usually wire like nichrome) and either let radiation spread the heat; or by forcing air over the heating element with a fan. So, the room is heated by convection or radiation.

Electric heat pumps are increasingly being used to heat rooms. They work like an airconditioner in reverse - the condenser coil is blown by air, heating the air and thus the room. In the summer, the waste heat is rejected by making the former expansion coil now the condenser.