.~ Including structure for mixing plural air streams together {4}
269
.~.~ With air pump
DEFINITION
Classification: 454/269
With air pump:
(under subclass 261) Subject matter wherein the air admitting means includes an air moving apparatus for forcing the air into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
228+, for an air pump used in combined inlet and outlet ventilator apparatus which exhausts a portion of the building air and returns the remaining portion of air to the stationary structure of the building along with incoming outside air, often into a combined stream of air.
338, for an inlet air way, including an air pump, of a generally nonmixing nature.
