Doubling the swimming season?
You know the problem. An unheated open-air swimming pool is only comfortably warm during a few weeks.
Doubling the swimming season all over Europe.
E.g. in France and Spain the sun is shining 10 months a year, but still the swimming pool is only used during 5 months. The BLOZOEN solar collectors make it possible to start the swimming season at least 2 months earlier and prolong it with another 2 months. In those 2 periods of the year the temperature of the swimming water is up to 10°C (50°F) higher than in unheated swimming pools.