Lub peev xwm ntawm lub hnab khib nyiab yuav tsum raug xaiv raws li qhov loj ntawm lub thoob khib nyiab thiab cov kev xav tau tiag tiag. Cov thoob khib nyiab me uas feem ntau pom hauv tsev feem ntau haum rau 10-20 litre hnab; cov no yog qhov zoo tagnrho rau cov cheeb tsam uas muaj cov khoom pov tseg qis, xws li chav pw thiab chav dej, muab kev yooj yim thaum txo cov khib nyiab.
Rau chav ua noj, qhov twg cov khoom pov tseg tseem ceeb hauv tsev tau tsim txhua hnub, 30-50 litre hnab feem ntau pom zoo. Cov hnab no muaj lub peev xwm tsim nyog rau kev tsis lees paub txhua hnub- xws li cov khoom seem thiab ntim khoom- thiab muaj peev xwm txaus- cov kabmob muaj zog los tiv thaiv kev tawg lossis tawg thaum nqa.
Cov thoob khib nyiab hauv cov chaw pej xeem xws li chaw ua haujlwm thiab tsev kawm ntawv feem ntau muaj peev xwm loj dua, yog li cov hnab ntim ntawm 50-80 liters (lossis tshaj 100 liters) yog qhov tsim nyog. Cov hnab no haum rau siab - ntim siv los ntawm ntau tus neeg, txo qhov zaus ntawm lub hnab hloov pauv thiab txhim kho kev ua haujlwm huv.
Thaum xaiv ib lub hnab, nws raug nquahu kom xaiv qhov loj me me ntawm lub thoob khib nyiab nws tus kheej; qhov no ua kom lub hnab qhib tuaj yeem qhwv ib ncig ntawm lub npoo, ua kom yooj yim rau kev ruaj ntseg thiab khi tawm. Tsis tas li ntawd, ib tus yuav tsum xav txog qhov hnyav thiab hom pov tseg kom tsis txhob muaj teeb meem xws li kev tsim kua muag lossis kev xau los ntawm cov hnab ntim tsis txaus lossis tsis txaus thauj khoom -cov kabmob muaj peev xwm, uas tuaj yeem cuam tshuam rau cov neeg siv khoom.