Including unitary housing having both inlet and outlet airways:
(under subclass 228) Subject matter comprising a single structure containing means for admitting air to a ventilated space and a separate means for exhausting air from the space.
(1) Note. A means for solely guiding air which is to be returned to the ventilated space (i.e., recirculating air alone) is not considered to be an inlet or outlet.
(2) Note. The air admitting and exhausting means must comprise separate and distinct passages. A single passage which admits air to the space under one condition and exhausts air from the space under another condition is not included in this subclass.
(3) Note. This and indented subclasses are intended to include subject matter in which the separate air admitting and air exhausting means are contained within or form a single, integral structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104, for a railcar, bus, or trailer having a unitary inlet and outlet housing which does not recirculate air.
142, for other types of vehicles having a unitary inlet and outlet housing which does not recirculate air. 241+, for a static structure (e.g., building) having a unitary inlet and outlet housing which does not recirculate air.
