floor-type heater

floor-type heater, floor furnace

A heater consisting of a burner, air-heating radiator, and valves which are suspended from a floor (usually in a single-story house) beneath a grille which is flush with the floor; warm air rises from the center of the grille, and return air descends around its perimeter.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.