Abstract: A pilot and burner assembly includes a burner assembly and a blower for supplying combustion air to the burner assembly. The system further includes a pilot assembly and a fuel supply for providing fuel to the pilot assembly. A pilot fan provides pilot air to the pilot assembly, the pilot fan being separate from the blower and provides air only to the pilot assembly.

Abstract: A gas burner system for a heating device includes a burner, a valve assembly for controlling a flow of fuel to the burner, a blower assembly for directing air to the burner, and a control system. The burner includes one or more burner plates for facilitating the mixture of air and fuel to be combusted in a combustion chamber. The control system is configured to independently control the valve assembly and the blower assembly according to a control profile, for generating a plurality of air/fuel mixtures each configured for operation of the burner at a different firing rate. By mapping the characteristics of both the gas valve and the combustion blower independently, the burner system is assured of operating at the proper air/fuel mixture over a very wide range of firing rates, with a turndown ratio of 30:1 or greater, and within ANSI safety and performance standards.

Abstract: A return temperature stabilizer assembly or metering means is provided for a boiler that facilitates the mixing of cooler, inlet return fluid with the heated fluid within the boiler chamber whereby the temperature striations within the boiler chamber are reduced or eliminated, and wherein the temperature stabilizer assembly is modular in design, and therefore capable of easily accommodating boilers of differing sizes.

Abstract: An air circulation system for use with or without ductwork having an outside air stream and a return air stream includes a controller and a return damper apparatus operatively connecting the return air stream to the controlled environment. The air circulation system further includes a heating unit and an air mass sensor disposed adjacent to the return damper apparatus. The air mass sensor selectively and directly detecting a ventilation rate of air moving through the return damper apparatus and communicates the ventilation rate to the controller which selectively modulates operation of the heating unit in dependence upon the ventilation rate.

Abstract: A boiler apparatus includes a housing defining an interior boiler chamber and a burner element arranged to be in thermal communication with the boiler chamber. An ignition device is provided for instigating combustion of an inlet gas stream, and is arranged adjacent one edge of the burner element. A gas restricting device is utilized for restricting contact between the burner element and the inlet gas stream such that the inlet gas stream is initially incident upon the one edge of the burner element, thereby forcing the inlet gas stream to propagate across the burner element from the one edge.

Abstract: A boiler apparatus includes a housing defining an interior boiler chamber and a burner element arranged to be in thermal communication with the boiler chamber. An ignition device is provided for instigating combustion of an inlet gas stream, and is arranged adjacent one edge of the burner element. A gas restricting device is utilized for restricting contact between the burner element and the inlet gas stream such that the inlet gas stream is initially incident upon the one edge of the burner element, thereby forcing the inlet gas stream to propagate across the burner element from the one edge.

Abstract: An air handling system for selectively and incrementally heating a flow of inlet air entering the air handling system through an inlet opening includes a first heating coil assembly in fluid communication with a first inlet manifold header and a first outlet manifold header, and a second heating coil assembly in fluid communication with a second inlet manifold header and a second outlet manifold header. The first heating coil assembly is oriented forward of the second heating coil assembly such that the first heating coil assembly is disposed closer to the inlet opening than the second heating coil assembly.

Abstract: An air circulation system for use with or without ductwork having an outside air stream and a return air stream includes a controller and a return damper apparatus operatively connecting the return air stream to the controlled environment. The air circulation system further includes a heating unit and an air mass sensor disposed adjacent to the return damper apparatus. The air mass sensor selectively and directly detecting a ventilation rate of air moving through the return damper apparatus and communicates the ventilation rate to the controller which selectively modulates operation of the heating unit in dependence upon the ventilation rate.

Abstract: A flow sensor for compressible fluid comprising a central hub having a total pressure chamber and a static pressure chamber disposed therein. A pair of wings extend radially outward from opposing sides of the total pressure chamber. The wings include a plurality of radially spaced holes oriented to generally face an upstream direction and an internal wing passageway connecting the spaced holes to the total pressure chamber. The sensor also includes a static tube having a tube wall extending outward from the static pressure chamber from a first attached end to a second distal closed end. A generally upstream facing hole and a generally downstream facing hole are disposed on opposing sides of the tube wall intermediate the first and second ends to define a fluid flow passage therethrough. An internal tube passageway connects the flow passage to the static pressure chamber.

Abstract: A rotating blade damper for an air handling system, the damper having a perimetrical frame and a blade or a plurality of blades each of which is rotatable with respect to the frame between a flow permitting position and a flow blocking position. Each blade is biased toward its flow blocking position but is normally retained in its flow permitting position, for example, by a fusible link. A stop and lock mechanism is provided to stop each blade in a predetermined open or flow permitting position and to securely lock or latch each blade in its closed or flow blocking position. The stop and lock mechanism includes a disc segment which is carried by a blade rod, at a location outside of the damper frame, and a slide plate which is positioned between the damper frame and the disc segment.

Abstract: A sight proof, drainable blade louver assembly for use in the wall of a building or other enclosure to permit outside air to enter the building, the louver having a plurality of spaced apart blades arranged between spaced apart vertical jambs of a frame in a vertical stack. Each blade has an upwardly inclined first portion and a second portion which is inclined downwardly from the first portion, thus giving each blade the configuration of an inverted V. The leading or free edge of the first portion has a vertical flange which extends upwardly partly to the blade thereabove, and a lip which extends obliquely from the free edge of the vertical flange partly back to the first portion. The free edge of the second flange has a vertical flange which extends downwardly therefrom partly to the blade therebelow.

Abstract: A multiple blade damper for an air handling system of the type in which at least an adjacent pair of blades of the damper are operated in parallel, that is, in which each of such pair of blades is oscillated in the same direction as the other of the pair of blades which is adjacent to it. A generally L-shaped baffle is positioned in the duct in which the damper is located between the adjacent pair of damper blades in alignment with the overlapping edges of the damper blades in their closed positions, with a short leg of the baffle extending normally of the air flow path through the damper and a long leg extending along the air flow path, a major terminal portion of the long leg extending at a small acute angle, for example at 15.degree., with respect to the air flow path.

Abstract: A damper for an air handling system in which the blade or blades are normally positioned to permit air to flow through the damper by a pneumatic cylinder which, when pneumatically actuated, overcomes the force of a spring within the pneumatic cylinder which would otherwise position the blade or blades to close the damper to air flow. The pneumatic cylinder normally receives air through a primary outlet of a three-way valve, the three-way valve also having a vent outlet and a valve member which is movable to permit pneumatic flow either from a source of pneumatic fluid through the primary outlet or from the pneumatic cylinder back through the three-way valve for venting through the vent outlet.