This grid is really designed for fishing… heat. It was displayed at one of the technical exhibitions in the GDR; the information given to our magazine by the editors of popular with German readers of the magazine for lovers of home design magazine “Praktik”.
When we take a shower, connected to a Central hot water system, we never think about how much energy is required to spend to heat and deliver the water pipes in our apartment or country house. Thinking about it only occur when you have to heat the water itself — for example a column with a gas or electric heater. Then suddenly it becomes obvious the fact that for so long progrevatsya water spilled from the shower head blessed rain, without even having to work hard for us, is already in the drain and is carried away in the sewers — and with it spent it on warm heat.