An internal combustion engine includes an exhaust conduit having an exhaust port fluidically coupled to ambient fluid and having an internal cross-sectional area and an engine cylinder fluidically coupled to the exhaust conduit. A fluidic amplifier is disposed within the exhaust conduit and is fluidically coupled to the engine cylinder. The amplifier is further fluidically coupled to a source of primary fluid and is configured to introduce the primary fluid and at least a portion of fluid from the engine cylinder to the exhaust port.

An apparatus includes a heat exchange member at least partially defining a passageway, and structure defining a first plurality of holes and a second plurality of holes. The first and second pluralities of holes provide fluid communication from the passageway to the exterior of the apparatus, i.e., to the atmosphere. A blower is operatively connected to the heat exchange member and configured to blow air into the passageway. The apparatus is configured such that, when the heat exchange member is sufficiently positioned with respect to a campfire, air exiting the first plurality of holes is directed downward and away from the campfire and air exiting the second plurality of holes has an upward velocity component.

An apparatus includes a heat exchange member at least partially defining a passageway, and structure defining a first plurality of holes and a second plurality of holes. The first and second pluralities of holes provide fluid communication from the passageway to the exterior of the apparatus, i.e., to the atmosphere. A blower is operatively connected to the heat exchange member and configured to blow air into the passageway. The apparatus is configured such that, when the heat exchange member is sufficiently positioned with respect to a campfire, air exiting the first plurality of holes is directed downward and away from the campfire and air exiting the second plurality of holes has an upward velocity component.

An exhaust handling system comprising: an exhaust pipe having an exhaust outlet, said exhaust outlet having a nozzle arranged to vent exhaust gas; at least one acceleration jet arranged to project an air flow at a velocity head greater than that of the vented exhaust gas; wherein the at least one acceleration jet and exhaust outlet are positioned to project the air flow so as to impinge on a path of said vented exhaust gas, and consequently transfer velocity head to the vented exhaust gas.

A heating system is configured to produce heated fluid. The system includes a source of primary fluid, a diffusing structure comprising an outlet structure out of which the heated fluid flows, at least one conduit coupled to the source and the diffusing structure and configured to introduce to the diffusing structure the primary fluid, and an intake structure coupled to the diffusing structure and configured to introduce to the diffusing structure a secondary fluid accessible to the system. The heated fluid includes the primary and secondary fluids.

A heating system is configured to produce heated fluid. The system includes a source of primary fluid, a diffusing structure comprising an outlet structure out of which the heated fluid flows, at least one conduit coupled to the source and the diffusing structure and configured to introduce to the diffusing structure the primary fluid, and an intake structure coupled to the diffusing structure and configured to introduce to the diffusing structure a secondary fluid accessible to the system. The heated fluid includes the primary and secondary fluids.

A blower systems includes a blower housing, a gasket, and a clamp. The blower housing includes a dilution air inlet port having a tubular portion with an end margin having a plurality of flanges separated by slits enabling flexing of the plurality of flanges to resiliently move radially inwardly from an unflexed position. The gasket extends within the end margin of the dilution air inlet port. The air supply system includes an inlet portion, a combustion air portion, and a one-piece fitting having an inlet, dilution air outlet, and a combustion air outlet. The clamp is positioned radially about the plurality of flanges such that it can secure a source of dilution air within the dilution air inlet port.

A blower systems includes a blower housing, a gasket, and a clamp. The blower housing includes a dilution air inlet port having a tubular portion with an end margin having a plurality of flanges separated by slits enabling flexing of the plurality of flanges to resiliently move radially inwardly from an unflexed position. The gasket extends within the end margin of the dilution air inlet port. The air supply system includes an inlet portion, a combustion air portion, and a one-piece fitting having an inlet, dilution air outlet, and a combustion air outlet. The clamp is positioned radially about the plurality of flanges such that it can secure a source of dilution air within the dilution air inlet port.

A self-recuperative burner comprising: a burner body having an exchanger; said exchanger comprises a first duct for the combustion air and a second duct for the flue gases: at least one first flue gas discharge pipe; characterized in that it comprises an air inlet duct leading to a first annular chamber concentric to said at least one first flue gas discharge pipe; said first annular chamber being connected also to a Venturi tube positioned inside said at least one first flue gas discharge pipe.

A self-recuperative burner comprising: a burner body having an exchanger; said exchanger comprises a first duct for the combustion air and a second duct for the flue gases: at least one first flue gas discharge pipe; characterized in that it comprises an air inlet duct leading to a first annular chamber concentric to said at least one first flue gas discharge pipe; said first annular chamber being connected also to a Venturi tube positioned inside said at least one first flue gas discharge pipe.