Water wash humidifier assembly

Claim 1

In a humidifier assembly comprising a humidifier housing having an open bottom, a rear wall opening adapted to be aligned with an opening in ducting containing air to be humidified and a front wall opening over which is mounted an openable door; a water collection pan removably mounted on the housing to close said bottom of said housing, a retaining frame removably mounted in socket means on said pan, said frame being a unitary wire frame forming an open top channel structure, an essentially flat block of substantially uniform thickness synthetic plastic material mounted in said frame and extending from said pan upwardly into said housing adjacent said rear wall opening and extending at least across the area of said opening, said frame having portions engagable with the opposite sides of said pad to support said pad against collapse or distortion, a spray nozzle having a remotely controlled valve mounted on said door and arranged to spray water onto said pad, and means in the wall of said housing for admitting air under pressure into the space between said nozzle and said pad to pass through said pad and discharge through said rear wall opening of the housing.