Abstract: An electric steam humidifier having a water reservoir configured substantially as a right triangle, wherein the hypotenuse side of the reservoir can be selectively mounted on the exterior surface of the bottom wall and exterior surface of the vertical wall of an air duct of a forced air furnace.

Abstract: A spray pad humidifier including a housing having two side wall portions extending perpendicular to each other along one edge, and being interconnected along the opposite edge by an arcuate wall. One of the side wall portions is provided with an opening communicating with the return cool air plenum of a furnace, and the other side wall portion is provided with an opening communicating with the hot air supply plenum of the furnace. A one-piece evaporator pad is configured to extend over both openings, and a water spray nozzle is mounted on the housing for spraying water into the housing and onto the portion of the pad extending over one of the openings. Reinforcing ribs are formed on the housing to not only provide channels within the housing for holding the evaporator pad in the operative position, but also to provide troughs for collecting drain water within the housing.

Abstract: A self cleaning solenoid controlled water spray nozzle and valve assembly including an adaptor connected at one end to a solenoid actuated valve member and having a nozzle and nozzle flow direction member connected to the opposite end of the adaptor. A cleaning pin is connected to the valve member and extends through the nozzle orifice. In one embodiment the nozzle is integrally formed with the adaptor and the flow direction member is integrally formed on the bottom wall of a cup positioned within the adaptor. In another embodiment the nozzle and associated flow direction member are threadably mounted on the adaptor.

Abstract: Water flow through air/water spray heads of an automatic in duct humidification and evaporative cooling system for buildings is modulated by a pneumatic control signal delivered to rear chambers of the system's spray heads through a pneumatic signal reversing relay connected with a pneumatic signal sending line in the pneumatic control section of the system.

Abstract: An in duct humidification and evaporative cooling system for industrial and commerical buildings is disclosed. Air and water under pressure are utilized to atomize water into minute droplets which rapidly evaporate and raise the level of relative humidity while producing evaporative cooling. A first relative humidity sensor/transmitter produces a signal proportional to the relative humidity of return air, and a second relative humidity sensor/transmitter provides a signal proportional to the relative humidity of supply air. Preset receiver-controllers external to the duct receive the two signals and send them to a low signal selector which in turn sends the lower signal to a modulating water valve and to an electrical switch which opens a valve in the pressurized air supply line. A second electrical switch operatively connected in the air supply line opens a valve in the pressurized water supply line.

Abstract: To reduce substantially the amount of tubing for condensate being returned from the steam distribution manifold and to enable such condensate to revaporize as steam, thereby increasing the thermal efficiency of the humidifier, a condensate baffle in the bottom of the steam distribution manifold projects with the manifold into the steam separator through a common coupling between the separator and manifold and downstream from the steam admission needle valve of the separator. Structural compactness with economy is achieved.

Abstract: An atomizing humidifier nozzle and connected solenoid operated valve are secured as a unit to a box through an adjustable connection which allows the nozzle to assume various angular positions in one plane forwardly of the box as where the nozzle is projecting into a warm air furnace plenum. A thermostat on the forward face of the box is exposed directly to the heat of the plenum. A stepped flange on the forward face of the box along one edge thereof cooperates with a mounting strip bridging an opening in a wall of the furnace plenum to form a convenient hinged connection between such wall and the box, allowing the box to be swung to an inspection and maintenance position. The box can be indexed in ninety degree increments on the plenum wall by relocation of the mounting strip to provide universality in the positioning of the humidifier nozzle on various furance and plenum configurations.