There are lots of smart devices coming out now that measure your water usage or are even energy efficient forms of eco shower heads. The easy to install EcoDrain transforms hot water going down the drain into a new energy source by heating up incoming shower water.
This eco shower device is a heat exchanger that can be used instead of pipes that would carry the used water through a drain and out of your house. The EcoDrain recaptures the hot water from your shower as it's traveling and applies its heat to the incoming surge of clean cold water. This way the amount of hot water coming from the boiler is reduced. By using a recycled source of heat, this system will also cut down on your household costs.