'Smart shower' slashes energy bills by half
Alzira inventors create fitting that re-uses heat from waste hot water
By Samantha Kett A SHOWER which uses little more than half the usual amount of energy has been invented by three primary school teachers in Alzira and could save the average family over €150 a year.
The ' Waste Water Heat Recovery System' (WWHRS) devised by tutors at the Luis Suñer school in the Ribera Alta district capital means even people who leave the shower running constantly or have to wait several minutes before it heats up will not be using up any more gas or electricity than if it was switched off.
The ' Passive Shower', the brainchild of teachers César González, Ricardo Baena and Ángel Almodóvar re-uses hot water run-off to heat up cold water in the system, meaning mains power is not needed to keep the temperature up.
Using a hydrothermic shower tray to ' recycle' heat from hot water, the ' Passive' model saves around 43% of energy compared with mainstream showers.
The trio set up a start-up a decade ago, called Cerian Shower – taking the first two letters of each of their names – but their prototype turned out not to be workable as it was ex- tremely difficult to maintain.
Since then, they have worked on simplifying the plan and then patenting their invention, and have recently unfailed a finished product that does not require drilling holes or modifying the existing structure of showers already installed in homes.
It is very lightweight, does not need any maintenance, lasts as long as the home itself does, and householders start to recover the cost of buying it from its very first use, Cerian Shower explains.
The creators started advertising the ' Passive Shower' internationally a month ago and are considering direct sales to individuals as well as to DIY chains, plumbers' merchants and property developers.
In fact, private homeowners who want to fit it may even be eligible for a grant towards the price, since government and council funding is often available for residents who want to improve energy efficiency in their homes. [email protected] fit and