The development of the air permeable ceiling ventilation system that contributes to moisture damage prevention of small volume housing

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04811
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 23020:Architectural environment and building equipment-related
• Research Institution: National Institute of Public Health (2021-2022); Miyagi Gakuin Women's University (2020)
• Principal Investigator: Honma Yoshinori 国立保健医療科学院, その他部局等, 統括研究官 (90331272)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 透気性断熱材 / 換気 / 結露

Outline of Final Research Achievements

The purpose of this study is to construct a heat and moisture recovery residential ventilation system that can reliably prevent condensation and microbial contamination in attic space. This function is realized by a permeable insulation called BVI (Breathing and Ventilating Insulation). It is confirmed that the filter performance of the BVI through simple experiments in the laboratory and in the field, also is examined hygrothermal condition in the attic space using HAM simulations.
As a result of the above, assuming temporary housing, it is possible to prevent condensation in the attic by supplying air to the attic, and to collect and filter heat by passing it through the BVI.

Free Research Field

建築環境・設備

Academic Significance and Societal Importance of the Research Achievements

2003年の改正建築基準法（シックハウス法）以来，住宅には0.5ACHを実現可能な換気システムが設置されることとなった。しかし、新型コロナウイルス感染症がまん延するにつれ、自宅内感染が問題視されており、今後も引き続き適切な衛生環境を維持できる換気システムの研究開発は必要である。本研究はそうした課題に対する一提案として、災害時に利用される応急仮設住宅の室内及び小屋裏結露の解消を念頭に、透気性繊維断熱材を活用した躯体換気システムを開発した。実装段階までにはまだハードルがあるが、小ボリューム住宅のみならず一般戸建住宅にも有効な換気システムになり得ると考えている。