At home, the last one to get to the shower has to do it on warm-ish water ? Even worse when you host family / friends or when the winter is really cold ? Obox makes it ancient history : you get twice as much water from your old water heater.

 

By preheating the cold water inlet of your shower tap you need half the hot water you used to !

 

 

 

 

 

 

 

 

The Centre Scientifique et Technique du Bâtiment (public french lab) has tested obox in 2010, 2011, 2012 et 2013. Download its test report here.