There's an electric heater in the bedroom.

卧室里有一台电暖器。

An electric heater consumes too much electricity.

电热器用电太费。

The electric heater radiated warmth.

电暖器散发出热量。

In the form of heating: electric heater.

加热形式：电加热器加热。

A small electric heater can heat an entire room.

一个小电热器能够把整个房间变热。