1. 保温：由于热能不断地自高温的环境流向低温的环境,所以冷却的过程必需持续不断,保温(Insulation)在整个冷却过程占了一个很重要的角色,其主要目的在将热能漏失降至最低.

2. 绝缘材料：被动屋使用超厚(ultrathick)绝缘材料(insulation) 及组件(component),不同於传统门窗的复合式(complex)门窗,让房屋变成高度密闭(airtight)空间,热气无法逸出(escape),冷空气无法渗入(seep in),以达到保温效果.

noun

1. the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity

2. the state of being isolated or detached

e.g. the insulation of England was preserved by the English Channel

Synonym: insularityinsularismdetachment

3. a material that reduces or prevents the transmission of heat or sound or electricity

Synonym: insulating materialinsulant