Yav dhau los, cov ncej puab qab rooj yuav tsum tau welded artificially, lub zog wel plees, nws yuav yog ib qho teeb meem kom sib sau ua ke lub khob insulated zoo. Qee zaum nws yuav ua rau insu
Qhov tshwm sim ntawm lub qhov rooj tawg pob hauv lub tub yees yog cov khoom siv tseem ceeb hauv tsev neeg thiab cov lag luam, ua kom muaj kev nyab xeeb thiab kev nyab xeeb. Central rau nws kev ua haujlwm yog cov khoom sib xyaw xws li lub qhov rooj ua kom lub qhov rooj foob, feem ntau dhau los tab sis tseem ceeb heev p
Nkag siab R - Tus nqi ntawm insulated iav qhia txog r - tus nqi yog ib lub ntsiab lus tseem ceeb zaus yog lub archeting thiab archulation thaum tham txog thermal rwb thaiv tsev. Nws sawv cev lub peev xwm ntawm ib daim lev