Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute and the base are non-adjustably fixed relative to each other. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A combustion air blower includes a blower housing, an impeller fan within the blower housing, and an embossment to restrict airflow from the combustion air blower. The blower housing has a discharge conduit defining a discharge passageway. The discharge conduit is adapted and configured to receive a baffle such that, when the baffle is received, the baffle extends inwardly into the discharge passageway from a first wall towards a second wall opposite the first wall. The baffle restricts airflow within the discharge passageway. The embossment is in the discharge passageway and in the second wall and extends towards the first wall such that the embossment restricts airflow within the discharge passageway. The embossment cooperates with a baffle to provide a reduced cross sectional area of the discharge passageway in comparison to an upstream portion.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The housing has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A combustion air blower includes a blower housing, an impeller fan within the blower housing, and an embossment to restrict airflow from the combustion air blower. The blower housing has a discharge conduit defining a discharge passageway. The discharge conduit is adapted and configured to receive a baffle such that, when the baffle is received, the baffle extends inwardly into the discharge passageway from a first wall towards a second wall opposite the first wall. The baffle restricts airflow within the discharge passageway. The embossment is in the discharge passageway and in the second wall and extends towards the first wall such that the embossment restricts airflow within the discharge passageway. The embossment cooperates with a baffle to provide a reduced cross sectional area of the discharge passageway in comparison to an upstream portion.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The housing has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute and the base are non-adjustably fixed relative to each other. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The cut-off angle extends at an angle that is no more than twenty degrees positive from horizontal. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust outlet passageway extends beneath the cut-off before reaching the exhaust port.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The housing has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A combustion air blower includes a blower housing, an impeller fan within the blower housing, and an embossment to restrict airflow from the combustion air blower. The blower housing has a discharge conduit defining a discharge passageway. The discharge conduit is adapted and configured to receive a baffle such that, when the baffle is received, the baffle extends inwardly into the discharge passageway from a first wall towards a second wall opposite the first wall. The baffle restricts airflow within the discharge passageway. The embossment is in the discharge passageway and in the second wall and extends towards the first wall such that the embossment restricts airflow within the discharge passageway. The embossment cooperates with a baffle to provide a reduced cross sectional area of the discharge passageway in comparison to an upstream portion.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute and the base are non-adjustably fixed relative to each other. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The cut-off angle extends at an angle that is no more than twenty degrees positive from horizontal. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust outlet passageway extends beneath the cut-off before reaching the exhaust port.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute and the base are non-adjustably fixed relative to each other. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

Abstract: An electrical machine includes a fan guard having a first air flow channel. A stator assembly is coupled to the fan guard and includes a stator yoke having a cylindrical outer surface and a stator pole shoe. The stator pole shoe includes a plurality of stator poles coupled to the stator yoke. The stator assembly includes a second air flow channel defined between the stator yoke and an adjacent pair of the stator poles. A rotor assembly is positioned inside the stator assembly. The rotor assembly includes a rotatable shaft and a rotor. The rotatable shaft defines a rotation axis. A control electronics board includes a plurality of heat making components and is enclosed in a housing having a vented base and a closure. The housing is coupled to the stator assembly opposite the fan guard. The vented base includes a plurality of vent openings opened toward the fan guard.

Abstract: A motor controller configured to be coupled to a motor and to a system controller is described. The motor controller includes a proportional-integral (PI) regulator coupled to a timer controller. The motor controller is configured to generate, by the PI regulator, a pulsed signal representing a reported speed of the motor. Additionally, the motor controller is configured to transmit the pulsed signal to the system controller, measure a time period that elapses for the motor to make a predefined number of revolutions, measure a number of pulses transmitted in the pulsed signal, and determine a measured speed of the motor from the time period. Further, the motor controller is configured to determine, by the PI regulator, a difference between the reported speed and the measured speed, and adjust, by the PI regulator, the pulsed signal based on the difference between the reported speed and the measured speed.

Abstract: A motor controller configured to be coupled to a motor and to a system controller is described. The motor controller includes a proportional-integral (PI) regulator coupled to a timer controller. The motor controller is configured to generate, by the PI regulator, a pulsed signal representing a reported speed of the motor. Additionally, the motor controller is configured to transmit the pulsed signal to the system controller, measure a time period that elapses for the motor to make a predefined number of revolutions, measure a number of pulses transmitted in the pulsed signal, and determine a measured speed of the motor from the time period. Further, the motor controller is configured to determine, by the PI regulator, a difference between the reported speed and the measured speed, and adjust, by the PI regulator, the pulsed signal based on the difference between the reported speed and the measured speed.

Abstract: An electrical machine includes a fan guard having a first air flow channel. A stator assembly is coupled to the fan guard and includes a stator yoke having a cylindrical outer surface and a stator pole shoe. The stator pole shoe includes a plurality of stator poles coupled to the stator yoke. The stator assembly includes a second air flow channel defined between the stator yoke and an adjacent pair of the stator poles. A rotor assembly is positioned inside the stator assembly. The rotor assembly includes a rotatable shaft and a rotor. The rotatable shaft defines a rotation axis. A control electronics board includes a plurality of heat making components and is enclosed in a housing having a vented base and a closure. The housing is coupled to the stator assembly opposite the fan guard. The vented base includes a plurality of vent openings opened toward the fan guard.