Dispenser with an improved heater arrangement

A volatile material dispenser, comprising:

• a housing configured to receive a refill containing a volatile material and a wick;
• a heater arrangement including a heater that is coupled to a heater chassis, wherein the heater chassis defines a passage therethrough that is configured to receive a portion of the wick;
• and
• a top cover configured to be coupled to the housing and defining a central aperture through which a vapor plume exits the housing,
• wherein the heater includes a heater chimney that is elevated relative to a peripheral edge of the heater, wherein a main surface extends between the peripheral edge and the heater chimney, and wherein the heater chimney extends away from the main surface to a first interior edge that defines a first diameter that is smaller than a second diameter defined by a second interior edge of the heater.

A volatile material dispenser, comprising:

• a housing configured to receive a refill containing a volatile material and a wick;
• a heater arrangement including a heating element and a passage that is configured to receive a distal portion of the wick;
• and
• a top cover defining a central aperture through which a vapor plume exits the housing,
• wherein the top cover includes a plurality of latches configured to be received and secured by a plurality of receiving portions of a control dial, and
• wherein 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, wherein the central aperture is positioned about a longitudinal axis that defines opposing first and second axial directions, and wherein the first surface includes a concave portion.