Room Heater

heater
device that heats water or supplies warmth to a room
A heater is object that emits heat or causes another body to achieve a higher temperature. In a household or domestic setting, heaters are usually appliances whose purpose is to generate heating (i.e. warmth). Heaters exists for all states of matter, including solids, liquids and gases.
A fastball
A conductor used for indirect heating of the cathode of a thermionic tube
A person or thing that heats, in particular a device for warming the air or water
fastball: (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke"

room
an area within a building enclosed by walls and floor and ceiling; "the rooms were very small but they had a nice view"
board: live and take one's meals at or in; "she rooms in an old boarding house"
Space that can be occupied or where something can be done, esp. viewed in terms of whether there is enough
Opportunity or scope for something to happen or be done, esp. without causing trouble or damage
A part or division of a building enclosed by walls, floor, and ceiling
space for movement; "room to pass"; "make way for"; "hardly enough elbow room to turn around"