Abstract: A refill kit for a device to dispense an air treatment chemical includes a substrate supported on a frame. The substrate is in the form of a puck, and includes sand, a binder, and an air treatment chemical. A candle is also provided, which is suitable to heat the substrate.

Abstract: Devices for dispensing an air treatment chemical such as insect repellent are disclosed. There is a chimney housing having a side wall defining an internal cavity. There is also a caddy assembly supported by the housing and having an upper caddy frame configured to mount a substrate bearing an air treatment chemical adjacent an upper portion of the housing, and a candle holder coupled to the upper caddy frame and configured to support a candle having a wick adjacent a lower portion of the housing. There is also a substrate bearing air treatment chemical suitable to be supported by the upper caddy frame, and a candle suitable to be supported by the candle holder. A refill kit for such devices is also disclosed. Also disclosed is an embodiment with a sand core bearing the repellent, a heat deflector positioned under the sand core, and a candle positioned under the heat deflector.

Abstract: A refill kit for a device to dispense an air treatment chemical includes a substrate supported on a frame. The substrate is in the form of a puck, and includes sand, a binder, and an air treatment chemical. A candle is also provided, which is suitable to heat the substrate.

Abstract: Devices dispenser air treatment chemicals in response to heat generated by a candle. Heat transfer elements carry flame heat to an impregnated substrate that is positioned mostly or entirely below the candle. The air treatment chemical vapors are kept away from prolonged direct exposure to flame heat, thereby reducing heat degradation of the active. The candle automatically adjusts heat transfer rates to correct for decreasing amounts of active on the substrate as the substrate sears being used up.

Abstract: Devices for dispensing an air treatment chemical such as insect repellent are disclosed. There is a chimney housing having a side wall defining an internal cavity. There is also a caddy assembly supported by the housing and having an upper caddy frame configured to mount a substrate bearing an air treatment chemical adjacent an upper portion of the housing, and a candle holder coupled to the upper caddy frame and configured to support a candle having a wick adjacent a lower portion of the housing. There is also a substrate bearing air treatment chemical suitable to be supported by the upper caddy frame, and a candle suitable to be supported by the candle holder. A refill kit for such devices is also disclosed. Also disclosed is an embodiment with a sand core bearing the repellent, a heat deflector positioned under the sand core, and a candle positioned under the heat deflector.

Abstract: Devices dispenser treatment chemicals in response to heat generated by a candle. Heat transfer elements carry flame heat to an impregnated substrate that is positioned mostly or entirely below the candle. The air treatment chemical vapors are kept away from prolonged direct exposure to flame heat, thereby reducing heat degradation of the active. The candle automatically adjusts heat transfer rates to correct for decreasing amounts of active on the substrate as the substrate sears being used up.