高こう気き密みつ

noun, noun which may take the genitive case particle 'no'

high airtightness; good airtightness

Technical term used in construction, architecture, and building performance to describe a structure with very low air leakage. Often appears in compound phrases like 高気密住宅.

See also: 気密

• この家いえは高こう気き密みつなので、冬ふゆでも暖あたたかい。