A combustion air inflow path, for a vehicle heater, includes a bottom area (24) and an outer circumferential wall (26) adjoining the bottom area (24) and extending essentially in the direction of a central longitudinal axis (L) of the inflow element (22). An inner circumferential wall (32) is arranged at a radially spaced location from the outer circumferential wall (26) and defines a space area (52) with same. An inflow opening arrangement (38) is provided for the inflow of air into the inflow element (22). The inflow opening arrangement (38) is provided in the bottom area (24) and is designed to generate a turbulent flow.

A fresh-air intake according to aspects of the disclosure includes an outer cover having a pair of side panels disposed in a generally parallel spaced relationship, a top panel coupled to, and disposed generally perpendicular to, each panel of the pair of side panels, a bottom panel disposed generally parallel to the top panel, and a front panel coupled to, and disposed generally perpendicular to, each panel of the pair of side panels and the top panel, the front panel having a window formed therein, a supply line coupled to the bottom panel, a weir extending above the bottom panel and surrounding a junction with the supply line, a baffle disposed inside the outer cover, the baffle being disposed inwardly of the window so as to prevent infiltration of moisture into the supply line, and a weep hole formed in the bottom panel.

A burner device (190) comprising an air intake, a burner head (192) including an ignition device, a body section (196) defining a fluid flow channel between said air intake and said burner head (192), and a gas injector (205) for injecting combustible gas into said fluid flow channel. The burner head (192) is oriented such that its longitudinal axis is substantially perpendicular to the plane in which the channel is defined and in which fluid flows, in use, along said channel.

A burner device (190) comprising an air intake, a burner head (192) including an ignition device, a body section (196) defining a fluid flow channel between said air intake and said burner head (192), and a gas injector (205) for injecting combustible gas into said fluid flow channel. The burner head (192) is oriented such that its longitudinal axis is substantially perpendicular to the plane in which the channel is defined and in which fluid flows, in use, along said channel.

A solid fuel combustion device includes: a fuel supply device including a firewood feed pipe or another fuel supplier; a primary combustion chamber coupled to the fuel supply device; a secondary combustion chamber including a wall formed of a fireproof material and having a structure in which a space is formed at a side of the combustion gas outlet of the primary combustion chamber to induce primary combustion gas to be secondarily expanded and combusted; and an air supply system including at least one air supply device in an entire combustion path formed in the primary combustion chamber and the secondary combustion chamber.

A gas burner unit for a cooktop includes a spreader positioned above a top surface of the cooktop to define a gap therebetween and having a plurality of gas outlets. The gas burner unit further includes a venturi in fluid communication with the gas outlets and an orifice holder having a plurality of protrusions defining a plurality of upwardly directed primary air inlets therethrough. The plurality of upwardly directed primary air inlets are in fluid communication with the gap on respective first ends thereof and with the venturi on respective second ends thereof opposite the first ends.

A gas burner unit for a cooktop includes a spreader positioned above a top surface of the cooktop to define a gap therebetween and having a plurality of gas outlets. The gas burner unit further includes a venturi in fluid communication with the gas outlets and an orifice holder having a plurality of protrusions defining a plurality of upwardly directed primary air inlets therethrough. The plurality of upwardly directed primary air inlets are in fluid communication with the gap on respective first ends thereof and with the venturi on respective second ends thereof opposite the first ends.

A hybrid stepping motor has a connector housing formed integrally with an insulator having an upper insulator and a lower insulator. The hybrid stepping motor includes a stator core and output terminals concentrically disposed outside the stator core. A wiring pattern serving as the output terminals has connector pins and land portions disposed eccentrically with respect to one another. The land portions are formed on an outer edge side of the wiring pattern. A surface, which is an uppermost surface of the wiring pattern, is located below a lowermost surface, in which jumper wires and lead wires pass, of the lower insulator. The lead wires are pulled out from a lower side, and are pulled out to guiding grooves.

A hybrid stepping motor has a connector housing formed integrally with an insulator having an upper insulator and a lower insulator. The hybrid stepping motor includes a stator core and output terminals concentrically disposed outside the stator core. A wiring pattern serving as the output terminals has connector pins and land portions disposed eccentrically with respect to one another. The land portions are formed on an outer edge side of the wiring pattern. A surface, which is an uppermost surface of the wiring pattern, is located below a lowermost surface, in which jumper wires and lead wires pass, of the lower insulator. The lead wires are pulled out from a lower side, and are pulled out to guiding grooves.

A furnace including a housing and a firebox in the housing having a combustion chamber. The furnace includes a combustion air delivery system for delivering combustion air to the combustion chamber. The combustion air delivery system includes a manifold mounted outside the combustion chamber and extending vertically along the front face of the combustion chamber from a lower end to an upper end. An air blower is mounted on the manifold. The combustion air delivery system includes a primary combustion air passage for delivering air from the air blower to a primary combustion air outlet at the front face of the combustion chamber. The combustion air delivery system includes a secondary combustion air passage for delivering air to a secondary combustion air outlet positioned inside the combustion chamber adjacent the top face of the combustion chamber.