Devices and systems and methods for dispensing volatile materials are disclosed. In one embodiment, the system includes a device for emitting volatile materials from an article of manufacture that contains volatile compositions. In such an embodiment, a portion of the device and a portion of the article together define an air flow path for emitting the volatile materials. The device may have various features, including: a heater that is movable with a spring; safety features; and a closed-loop heater temperature feedback system. The device can have placement instructions associated therewith for proper operation of the device.