A data center humidification system can include a housing configured to be mounted within a server cabinet, the housing having an inlet for receiving warm air and an outlet for ejecting humid air, a wetted media within the housing proximate to the inlet, a liquid delivery pipe at least partially within the housing and configured to deliver liquid to the wetted media, at least one outlet droplet trapping media within the housing proximate to the outlet, and at least one fan configured to move air through the housing.

A volatile material dispenser includes a housing configured to receive a refill containing a volatile material and a wick. The housing includes a heater arrangement that defines an opening in which a distal portion of the wick is received. Additionally, a top cover is configured to be coupled to the housing and defines a central aperture through which a vapor plume exits the housing. The top cover includes an annular wall having a first surface, a second surface opposite therefrom, an outer edge, and an inner edge that defines the central aperture. The central aperture is positioned about a longitudinal axis that defines opposing first and second axial directions. The top cover further comprises a plurality of apertures arranged around the central aperture. The top cover defines a converging outlet defined between a trough and the inner edge, and the second surface curves from the trough to the inner edge.

Disclosed are a humidifier and a household appliance. The humidifier includes a housing, a fan, a water absorption net assembly and a time record assembly. The housing is provided with an air inlet and an air outlet, an air duct communicating with the air inlet and the air outlet, and a water storage tank communicating with the air duct are formed inside the housing. The fan is provided in the air duct. The water absorption net assembly is at least partially extending into the water storage tank and at least partially extending into the air duct. The time record assembly is installed in the housing and configured to record a use time of the water absorption net assembly.

A volatile material dispenser includes a housing that receives a refill that contains a volatile material and a wick. The volatile material dispenser further includes a heater arrangement that includes a heater that is coupled to a heater chassis using a first latch that abuts a first latch receiving portion of the heater. The heater chassis defines a passage therethrough that is receives a portion of the wick. Further, a top cover is coupled to the housing and defines a central aperture through which a vapor plume exits the housing. The top cover includes an annular wall having a first surface, a second surface opposite therefrom, an outer edge, and an inner edge that defines the central aperture. The top cover further comprises a plurality of apertures arranged at least partially around the central aperture, and the first surface includes a concave portion.