Abstract: A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice.

Abstract: In certain embodiments, a dual fuel heater has a pressure regulating device for selectively coupling with a first source or a second source operating at different pressures. The dual fuel heater can also include first and second fuel lines, a fluid flow controller, a combustion chamber and first and second oxygen depletion sensor nozzles. The fluid flow controller is configured to selectively permit flow of fuel to either the first fuel line or to the second fuel line. In some embodiments, the first fuel line is connected to the first oxygen depletion sensor nozzle and the second fuel line is connected to the second oxygen depletion nozzle.

Abstract: A wick-holder assembly includes a wick-retention member for retaining a wick thereto and a heat-conductive element extending from a base portion. The heat-conductive element may include materials having different thermal expansion coefficients. The materials may be arranged to interact to cause a portion of the heat-conductive element to move in response to a flame disposed on the wick.

Abstract: Certain embodiments of a nozzle are configured to dispense a first gas, liquid, or combination thereof at a first pressure in a first mode of operation and dispense a second gas, liquid, or combination thereof at a second pressure in a second mode of operation. In some embodiments, the nozzle is integrated in a heat-producing device, such as, for example, a heater, a fireplace, or a stove. In some embodiments, the heat-producing device including the nozzle can operate with a first combustible fuel at a first pressure, or alternatively, can operate with a second combustible fuel at a second pressure. In some embodiments, the nozzle is used in applications other than heat-producing devices.

Abstract: In certain embodiments, a pressure regulating device for selectively coupling with a first source or a second source includes a housing defining at least a portion of a first input channel, a second input channel, and an output channel. In some embodiments, the device further includes a first connector configured to couple with the first source such that the first source is in communication with the first input channel. The device also includes a second connector configured to couple with the second source such that the second source is in communication with the second input channel. The device further includes a first regulator configured to regulate flow from the first input channel to the output channel and a second regulator configured to regulate flow from the second input channel to the output channel.

Abstract: A wick assembly for a liquid fuel combustion apparatus is structured by laminating a main wick and an auxiliary wick, and sandwiching a separator of an oil-impermeable material therebetween. By being so structured, the main wick can be made being hardly deteriorated in terms of its calorific value. A material having a large oil containing ability can be selected for the main wick, and distance between the oil level and top of wick can be made shorter. Fire-spreading time of the wick assembly after a lapse of long service period is still as short as that at the beginning of the service, and generation of an objectional odor and carbon monoxide at the time of ignition can be suppressed constantly.