Have you ever tried to get a pellet or wood stove from room to room? I wouldn't suggest it. But a typical space heater weighing in at lower 10 pounds is to be able to move from room to room when compared with a load of laundry.
Why heat a house? As discussed in one of my previous articles, a garage is in charge of 20% of usable space in What Is The Best Place To Get Alpha Heater typical home and represents the most under-utilized space in most climates within winter numerous weeks.