(under subclass 254) Subject matter particularly adapted to directing air through an opening in (1) a projecting overhang portion at the lower edge of a structure's external top covering (i.e., roof) or (2) an opening in or adjacent a sloping beam which supports a structure's external top covering.
SEE OR SEARCH THIS CLASS, SUBCLASS:
228+, for means mixing recirculated air with fresh air directed into a ventilated space.
SEE OR SEARCH CLASS
236, Automatic Temperature and Humidity Regulation, particularly
13, for plenum-type fluid mixers with automatic temperature and humidity regulation.
