Abstract: Technologies for use with a hot water recirculation system containing a hot water source, a booster pump downstream from the sensor, a conduit connecting the booster pump and water source, a flow sensor external to the conduit for sensing water flow within the conduit, and a plumbing fixture downstream from the pump are provided. The technologies enable a controller to couple to the sensor and the pump, and operate in a calibration mode and a control mode. Such operations can increase energy efficiency of the pump and increase operational longevity of the pump.

Abstract: Technologies for use with a hot water recirculation system containing a hot water source, a flow sensor downstream from the source, a booster pump downstream from the sensor, and a plumbing fixture downstream from the pump are provided. The technologies enable a controller to couple to the sensor and the pump, and operate in a calibration mode and a control mode. Such operations can increase energy efficiency of the pump and increase operational longevity of the pump.

Abstract: Technologies for use with a hot water recirculation system containing a hot water source, a flow sensor downstream from the source, a booster pump downstream from the sensor, and a plumbing fixture downstream from the pump are provided. The technologies enable a controller to couple to the sensor and the pump, and operate in a calibration mode and a control mode. Such operations can increase energy efficiency of the pump and increase operational longevity of the pump.

Abstract: Technologies for use with a hot water recirculation system containing a hot water source, a flow sensor downstream from the source, a booster pump downstream from the sensor, and a plumbing fixture downstream from the pump are provided. The technologies enable a controller to couple to the sensor and the pump, and operate in a calibration mode and a control mode. Such operations can increase energy efficiency of the pump and increase operational longevity of the pump.

Abstract: Technologies for use with a hot water recirculation system containing a hot water source, a flow sensor downstream from the source, a booster pump downstream from the sensor, and a plumbing fixture downstream from the pump are provided. The technologies enable a controller to couple to the sensor and the pump, and operate in a calibration mode and a control mode. Such operations can increase energy efficiency of the pump and increase operational longevity of the pump.

Abstract: Electronic devices with user interfaces, including but not limited to systems and methods for modifying screen content within a graphical user interface based upon user inputs are provided. Methods for providing visual lessons on an electronic device are provided. Such methods can involve one or more levels, with each level comprising one or more teaching concepts, and a number of levels corresponding to a course. These concepts can correspond to subtopics within an overall course subject. A user of an electronic device can be required to learn and master one or more concepts in a particular order, or in other instances the individual concepts within a level can be navigated in alternative sequences as specified by configurable program code of the technology. Lessons can be linked within an over-all story.