In order to reduce the concentration of harmful chemical substances in a room

In recent years, those who have newly built or purchased a house said, "Even if you move into a new house, the smell is strong and the eyes and nose are stimulated." Consultations such as "I'm worried about the impact on health" are increasing. Such cases may be caused by chemical substances in indoor air environments.
Here, we will explain the chemical substances that pollute the air in the room you care about, the basic concept of building a house that reduces the concentration of harmful chemical substances in the room, and what to be aware of immediately after moving into a house after new construction or renovation.

• Importance of air in the room (indoor air environment)

• Basic concept of residential construction to reduce the concentration of harmful chemical substances in indoors

• Be careful immediately after moving into a new or renovated house

• Modern people spend most of their time in one of the rooms.
• The inflow of outside air into the building decreased, and airtightness increased due to indoor insulation.
• The use of chemical substances in building materials and interior ornaments increased, resulting in increased opportunities for indoor air pollution.

• Use construction materials with less emission of hazardous chemical substances
• When building materials and construction materials that may emit harmful chemical substances must be used, reduce the amount of use as much as possible.

• Properly construct building materials and construction materials
• Set the construction period with due consideration given to curing, drying, etc.

• Plan in consideration of the layout and layout of windows for efficient ventilation.
• Ensure adequate ventilation volume

For some time after new construction, the release of chemical substances may be high. Ventilation is effective when opening not only windows but also indoor doors to ensure ventilation. If you still experience symptoms such as a strong smell, a flickering eyes, or a thirst, consult with Health and Welfare Center.

-Reference Materials-

（1） Health and Housing Study Group: Design and construction guidelines for reducing indoor air pollution, Japan Housing and Building Energy Conservation Agency, 1998.
（2） Health and Housing Study Group: User's Manual for Reduction of Indoor Air Pollution, Housing and Construction Energy Conservation Agency, 1998.
（3） Nishi-ku, Yokohama-shi: Guideline for living in Nishi Ward Yuu, City of Yokohama, Nishi Ward, 1997.