Abstract
We sent out questionnaires to members of staff about two hundred peoples. We inverstigate the popurality with housewife of building materials in kitchen and trunk rooms by difference of housewifes lifestyle. In result we understand housewife being occupation need prevent stain and dicrease smell. And we understand the higher popularity of relaxation room from result throuth questionnaires by DEN space. We try to make material of growing minus ion sayind effect of relaxation, meature quality of minus ion and VOC.