Lub qhov rooj hluav taws yog lub qhov rooj nrog kev ntaus hluav taws-tiv thaiv (qee zaum hu ua kev tiv thaiv hluav taws xob rau kev kaw)
siv los ua ib feem ntawm qhov kev tiv thaiv hluav taws kub ua kom txo qis kev sib kis hluav taws thiab haus luam yeeb ntawm cov khoom siv cais
ntawm tus qauv thiab kom pab kom egress muaj kev nyab xeeb los ntawm ib lub tsev lossis cov qauv lossis nkoj. Hauv North American Tsev Codes, nws, nrog rau hluav taws dampers,
Feem ntau raug xa mus rau raws li kev kaw, uas tuaj yeem muab tau muab piv rau kev sib cais hluav taws uas muaj nws, muab cov teeb meem no tsis yog tua hluav taws lossis kev sib cais.
