[Installation Case] Yegrin Apartments, Jongno-gu — BLOS (Building Oasis) System Adopted
Solving the Rusty Water Problem — The Beginning of a Purifier-Free Apartment

Yegrin Apartments in Jongno-gu, Seoul, have adopted GeoGrid’s smart water quality management solution, BLOS (Building Oasis) to resolve the issue of reddish tap water caused by aging pipes.

Before installation, residents experienced severe discoloration and odor in their tap water, leading most to rely on bottled water or individual purifiers.
However, within just three weeks after the BLOS system was installed, the entire complex passed all national drinking water quality standards, confirming significant and measurable improvement.

In particular, the tap water drinking rate, which had been only about 1% before installation, surged to 82% after BLOS was introduced — proving that a reliable, purifier-free water environment is now a reality.

Unlike conventional purifiers, BLOS is an integrated water quality management infrastructure that purifies the entire building’s tap water through a centralized system while monitoring water quality, usage, and pipe conditions in real time.
Without the use of chemicals or pipe cleaning, BLOS effectively prevents slime, scale, and rust, extends pipe lifespan, and dramatically reduces maintenance costs.

Through this installation, Yegrin Apartments have presented a new model of a “purifier-free apartment,” improving residents’ quality of life across environmental, economic, and residential satisfaction dimensions.

GeoGrid plans to expand the BLOS system to more aging apartment complexes and mixed-use residential buildings, leading the way toward the future of sustainable water infrastructure.