The systems and methods described herein relate to heating ventilation and air conditioning (HVAC) systems and water heating systems in relation to a building and residential automation system. Some embodiments of the systems and methods described herein relate to HVAC systems and water systems in relation to an integration of building or residential automation systems. Specifically, the disclosure relates to maintaining a desirable water temperature for a desirable time period. By reducing unnecessary heating of water, the systems disclosed herein may result in fewer wasted resources and a lower utility bill. In one embodiment, a method for security and/or automation systems may be disclosed. The method may comprise monitoring a status of a water heater and monitoring an occupancy status of a residence. The status of the water heater may adjust, automatically, based at least in part on the monitoring.