Space heaters are supplemental room heaters that, unlike HVAC systems, provide heat to only that specific room rather than the whole house. Various heater sizes are available, ranging from small baseboard heaters to large wall furnaces.
These heaters function similarly to unit heaters, except on a smaller scale. Unit heaters are more applicable to garages or large industrial spaces like warehouses. Space heaters are mainly used inside the main parts of a house or building, such as bedrooms, kitchens, and so on.