It becomes a subject of discussion of "sick building syndrome" for people who are moved into new house and renovated house, resulting in the reconsideration for a variety of VOC emission including formaldehyde derived from various wood materials for construction. It becomes more strict for formaldehyde use according to the revised Building Standard Law in 2003. Asahi WoodTech has accomplished the performance of wood product with F☆☆☆☆ by promoting technology development for substantial a reduction of VOC emission including formaldehyde from all interior building construction materials in order to maintain healthy air environment in living area without worrying about use space.
What is F☆☆☆☆?
F☆☆☆☆ (F four stars) represents a grade for emission levels of causative hazardous substances, such as formaldehyde, that cause building sick syndrome. The levels are graded according to the number of stars by JIS (Japan Industrial Standards Committee), JAS (Japan Agricultural Standard) or the Minister of Land, Infrastructure and Transportation. Products with F☆☆☆☆ is classified as the highest grade with containing the lowest levels of hazardous substance emission, suggesting that these products can be used without the restriction under the Building Standard Law.