Cov qhov rooj hluav taws hauv tsev feem ntau yog ua los ntawm cov ntoo, thiab cov ntoo hluav taws kub yog tsim los ntawm cov ntaub plaub thiab iav ntaub plaub raws li cov ntaub ntawv thermal rwb thaiv tsev, uas tsis yog-combustible, muaj qhov kub thiab txias tsis kam. Ntoo qhov rooj hluav taws muaj xim ci dua thiab muaj ntau hom kev sib khi ntawm ntug.