Abstract: A portable humidifier assembly adapted for use in association with a forced air heat vent, the apparatus comprising: an inner frame comprising a rear crossbar, a front crossbar and a plurality of semicircular ribs affixed therebetween, the front crossbar of the inner frame including a coupling device, an outer frame including a rear crossbar, a front crossbar and a plurality of semicircular ribs affixed therebetween, the rear crossbar of the outer frame being hingedly coupled to the rear crossbar of the inner frame, the front crossbar of the outer frame including a coupling device; and a sponge adapted to retain water, in an operative orientation the sponge being soaked with water and placed between the ribs of the inner and outer frames, the sponge being locked in placed by hingedly closing the outer frame upon the inner frame and coupling the front cross bars of the respective frames together.