寒冷地住宅の煙突効果を活かした集中換気システムの換気特性 : 天井チャンバーを用いた給気システムの可能性の検討

Abstract

The purpose of the study is to discuss the feasibility of a passive stack ventilation system using the beam space of a house as an air distribution chamber. The results of the calculation and the measured air flow rates in a test house are as follows 1) The proposed system requires less airtigthness than a direct air supply system using wall inlets. Designing stacks is easy in the proposed system because the height of the neutral zone is not influenced by the degree of airtightness. 2) In airtight houses, the distribution of fresh air and the ventilation routes can be well-designed using the beam space. The ventilation rate increased with the difference between the indoor temperature and the outdoor temperature. 3) In houses using a space heating system, the passive stack ventilation system fulfills the ventilation requirement during 90% of the heating season. And the ratio of the total ventilation volume to the ventilation requirement is 70%.