Iav yog qhov nrov tshaj plaws thiab ntau yam khoom siv hauv tsev siv niaj hnub no, vim qee ntu rau nws tas li txhim kho lub hnub ci thiab thermal ua haujlwm. Ib txoj hauv kev ua tiav no yog ua tiav los ntawm kev siv hluav taws xob passive thiab hnub ci qis-e txheej. Yog li, dab tsi yog qis-e ...