Water portable heater pros and cons are applied to the house heat system as a piece of sewerlines. It is also used in every single showers and faucets to increase hot water.
Why a person want a cordless space heaters or an energy driven heater that will still leave even your small space feeling chilly when is actually not cold weather outside?
Have you ever tried to be able to a pellet or wood stove from room to room? I wouldn't suggest it. But a typical space heater weighing in at when compared with 10 pounds is easier to move from room to room compared to load of laundry.
Heaters come into play different sizes and are powered by different means too. Some may use propane gas or even infrared. But nowadays, most heaters are powered by electricity.