electric furnace [1]
Device using electricity for creating heat and blowing it through the duct system.
access panel 
Removable panel for accessing the furnace’s components.
electric connection 
Device connecting the electric furnace to the dwelling’s electric system.
plenum 
Joining duct between the furnace and the hot-air distribution system.
air return 
Duct directing air from a room back to the furnace to be reheated.
hot-air outflow 
Duct directing hot from the furnace to the rooms.