This 50 gal. per day water filter is required to use a fogger type humidification system. It will filter out the minerals and produce virtually distilled water. A fogger will atomize and disburse whatever is in the water provided to it. Unfortunately all water contains minerals notably calcium and lime that will produce an annoying white powdery dust. We remove those minerals so the fogger can supply a clear clean finely atomized fog. One filter can supply enough water for two CEZIO foggers or eight Trion units. A cold water supply and a drain are required to operate this unit.