this post was submitted on 20 Nov 2023
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Home Automation
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Home automation is the residential extension of building automation.
It is automation of the home, housework or household activity.
Home automation may include centralized control of lighting, HVAC (heating, ventilation and air conditioning), appliances, security locks of gates and doors and other systems, to provide improved convenience, comfort, energy efficiency and security.
Warning: Working with electricity can result in injury, property damage, or even death if it is not done properly. Please keep this in mind while assisting others. If you are not sure about what you are doing, hire a licensed professional.
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I'll answer your question first.
Look into hot water recirculation pumps. It will cycle the water for you, without waste.
These are typically intended for use where the shower/sink is far from the heater and there is a lengthy run of cold water before the water in the pipe is cleared. The recirculation pumps keep the water in the pipe hot, so that you don't have to wait 60+ seconds for the shower to get hot.
Having said that; what you describe sounds like a failing heater. Either a failed heating element or a failed thermostat. There are two of each.