Izinga lokuhamba kombhobho libhekisa kumthamo wokutshiza wombhobho ngeyunithi yexesha phantsi koxinzelelo lweyunithi, kwaye ixabiso liyunithi yevolumu. Njengoko uxinzelelo lutshintsha, inqanaba lokuhamba kwenaliti liya kutshintsha. Ngokubanzi, la maxabiso mabini ayalingana, kwaye sinokuwabala ngale ndlela ilandelayo:

ifomula:

Qx inqanaba lokuhamba okungaziwayo (L / min)

Q1 inqanaba lokuhamba elaziwayo (L / min)

F2 uxinzelelo ekujoliswe kulo (ibar)

F1 uxinzelelo olwaziwayo (ibha)