Projects of houses and cottages should be thoroughly thought out. After all, if you have children in your house, then water in the pool will need to heat up to +30 degrees, but for an adult, the limit is acceptable +23-25 degrees on the surface of the mirror of the pool. All this supply should be laid even at the stage of design work in the power of the top -end house, so that during the construction of the pool or its perspective, this factor does not become a surprise for you.