Kuphedwa zitsulondi chitsulo chomwe chakhala chodetsedwa kwathunthu powonjezera wothandizirana ndi wothandizila kuti palibe chisinthiko cha mpweya panthawi yolimbika. Amadziwika ndi kuchuluka kwa mankhwala osokoneza bongo komanso kumasuka ku ma poboties.

Chitsulo chophedwa chimakhala chitsulo chosatha, koma masamba a carbon monoxide amatulutsa nyimbo zoperekedwa mu ingwot. Nyengo imathetsa chitoliro chomwe chapezeka mu kuphedwa chitsulo ndikuwonjezera zokolola pafupifupi 90% ndi kulemera. Zitsulo zosaphedwa nthawi zambiri zimagwiritsidwa ntchito ngati chitsulo cha kaboni pakati pa 0,15 ndi 0.25% kaboni, chifukwa imakutidwa ndi mawonekedwe.

Choterera chitsulo, omwe amadziwikanso kuti akukoka zitsulo zamtundu wambiri, sizimakhala zopanda pake zomwe zimawonjezeredwa potuluka zomwe zimayambitsa kaboni monoxide kuti isasinthe. Izi zimapangitsa mabowo ang'onoang'ono pansi omwe pambuyo pake adatsekedwa mu njira yoyenda yotentha. Zitsulo zowoneka bwino kwambiri zimakhala ndi zokhudzana ndi ma carbon pansipa 0.25%, zomwe zimapangidwa ndi mangunese pansi pa 0,6%, ndipo sizikugwirizana ndi zinthu zokongola zomwe sizikulimbikitsidwa pakugwiritsa ntchito kutentha.