.~ Including unitary housing having both inlet and outlet airways {1}
235
.~.~ Having air pump means for both airways
DEFINITION
Classification: 454/235
Having air pump means for both airways:
(under subclass 234) Subject matter comprising an air moving means which directly contacts air to force it into the ventilated space and an air moving means which directly contacts air to force it out of the space.
(1) Note. While most subject matter in this subclass comprises a means for contacting and forcing the air into the ventilated space and a separate means for contacting and forcing air out of the space, subject matter comprising a single means which performs both functions is also included herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
244, for similar devices where there is no forced recirculation.
252, for ventilation systems having air pump means for separate inlet and outlet airways.
