Rain dripping on roof and windows, then water is collected by special tubes to four big tubes which located on four corners of building sides. All windows have a special slope for water collection and its direction in special tubes. Of four big tubes water down into the cellar where water pumps lift it up to 3rd floor on filter system. Passed all layers of filter system water will down in the cellar in tank for clean water, and can further be used.

Using that filter system you can also clean already used water, the system is universal layers can be easy changed depending on conditions of using this filter system. The filtration system is built right into the building like part of building.

Filter system has imitates natural water filtration composition by layers of natural materials, occupies three floors located in walls between columns.

Layers of water filtration:

·    Water tank

·    Intermediate pad

·    River pebbles

·    Gravel

·    Fine gravel

·    Coarse sand

·    Fine sand

·    Clay

·    Pressed wood fibers

·    Pressed activated coal fibers

·    Micro filter with silver ions

·    Tank for clean water.

Layer thickness of 1 meter to 10 centimeters, material layers can be changing depending on water quality.

Inside filter system is closed with glass and becomes a decorative element of interior.