A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.

Disclosed is a heat exchanger that has an internal air flow pattern such as a helical pattern. The heat exchanger includes a shell that encompasses an inner series of heat exchange tubes and an outer series of heat exchange tubes. A baffle sheet is juxtaposed next to the outer series of heat exchange tubes. And the baffle sheet is configured to direct air flow within the heat exchanger in a configuration, such as a helical configuration, from a center of the shell toward an outer region of the shell.

A water heating system includes a burner and a gas valve fluidly connected to the burner to deliver a flow of combustible gas thereto. The gas valve has an adjustable throttle for the flow of combustible gas, along with a motor to adjust a position of the throttle. A controller is configured to determine a throttle position corresponding to a target air-fuel ratio of the burner during a calibration sequence, and to control the motor in order to operate the burner at that target air-fuel ratio throttle position during a start sequence. The controller is configured to monitor a characteristic of the burner during the start sequence, and to initiate the calibration sequence if the monitored characteristic exceeds an error threshold.

A packaging system for a hot water heater includes an outer box, a top insert, an offset filler, a base insert, and one or more side panels. The top insert contacts a top surface of the hot water heater and a top inside surface of outer box. The offset filler is coupled to the top insert and is sandwiched between the hot water heater and the outer box. The base insert contacts the bottom surface of the hot water heater and a bottom inside surface of the outer box. The base insert includes raised perimeter structures that form a shape that matches a shape of the bottom surface of the hot water heater. Each side panel includes a raised pattern.

An inlet mixer system for a gas heater includes a housing in fluid communication with an inlet of a combustion blower, and first and second mixer inserts, each removably positionable within the housing. Each mixer insert includes a body defining a mixing chamber, an air intake, and a plurality of orifices disposed radially about the body and extending through the body, which provide respective volumetric flow rates of a fuel gas. When the first mixer insert is positioned within the housing, the inlet mixer system is configured for use with a first fuel gas, and when the second mixer insert is positioned within the housing, the inlet mixer system is configured for use with a second fuel gas.

A flow regulating device (60) and a gas water heater (1) having the same are provided. The flow regulating device (60) includes a housing (100) defining a water inlet (110) and a water outlet (120) therein; a flow regulating assembly (200) disposed in the housing (100), a temperature-flow regulating orifice (230) located between the water inlet (110) and the water outlet (120) being defined in the flow regulating assembly (200), and the flow regulating assembly (200) further including a regulating component for regulating opening of the temperature-flow regulating orifice (230); a temperature sensitive assembly (300) disposed in the housing (100) and connected to the regulating component, and the temperature sensitive assembly (300) driving the regulating component according to temperature of water in the housing (100). The flow regulating device has advantages of short regulating time, and high regulating precision.

Provided herein are systems and methods (i.e., utilities) that allow for the use of non-grid tied renewable energy systems (e.g., PV arrays and/or wind turbines) without requiring battery banks. In various aspects, these utilities permit the efficient use of renewable energy systems to generate electrical power as well as the ability to dynamically direct where such electrical power is applied.

A forced air supply combustion apparatus sucks combustion air from an air supply port. An air filter for collecting foreign matters in the air is mounted on an air-supply-port-formed plate in an insertable and drawable manner. A filter frame is arranged to be brought into close contact with a peripheral part of the air supply port in a state of having mounted the air filter in position. The air-supply-port side edge parts are provided with retaining pieces to clamp a filter side frame part in the Z-axis direction against the side edge parts. A distance in the Z-axis direction between the air-supply-port side edge parts, and the retaining pieces is set larger than a dimension, in the Z-axis direction, of the filter side frame part, and is set smaller than a sum of the dimensions to be obtained by adding to said dimensions the projection height of the projections provided in a projecting manner.

The present invention discloses a burner, a gas water heater and a processing method of fire row, wherein the burner comprising: a plurality of fire rows; an air channel is formed between at least two fire rows; the fire row has a burning substrate; the burning substrate is provided with main burning holes; the burning substrate is further provided with auxiliary burning holes downstream of the main burning holes; at least one the auxiliary burning hole is disposed on at least one side of the main burning hole in a length direction of the burning substrate; flame of the auxiliary burning hole intersect with flame of the main burning hole; and a frame for mounting the fire rows. The burner, the gas water heater and the processing method of the fire rows disclosed in the present invention can help to decrease flame height, facilitate manufacturing and reduce costs.

A snow melting and removal vehicle includes a vehicle body that is drivable. A primary chamber is situated inside the vehicle and defines an open area. A collection assembly includes an auger configured to collect the snow from the ground surface and deposit the snow into the primary chamber. A heating assembly surrounds the primary chamber for imparting heat to the primary chamber when energized so as to melt the snow therein. The primary chamber and the vehicle body define outlet openings for releasing the melted snow away from the primary chamber and vehicle body. A filter assembly intermediate the collection assembly and primary chamber includes a filter grate rotatably coupled to the primary chamber and configured to rotate to block debris from entering the primary chamber. A collection chamber is downwardly adjacent the grate and is configured to collect solid debris blocked by the filter grate.