Ihitha yokucwilisa ishisa amanzi ngaphakathi kwayo ngqo.Lapha, kunesici sokushisa esicwiliswa emanzini, futhi amandla kagesi anamandla adlula kuwo okwenza ukuthi ashise amanzi ahlangene nawo.
Ihitha yokucwiliswa iyisifudumezi samanzi sikagesi esihlala ngaphakathi kwesilinda samanzi ashisayo.Isebenza kancane njengeketela, isebenzisa i-heater kagesi engangeni (ebukeka njengeluphu yensimbi noma ikhoyili) ukushisa amanzi azungezile.
Izifudumezi zokucwilisa ze-WNH zenzelwe ngokuyinhloko ukucwiliswa ngokuqondile oketshezini olunjengamanzi, uwoyela, izinyibilikisi nezixazululo zezinqubo, izinto ezincibilikisiwe kanye nomoya namagesi.Ngokuphehla konke ukushisa ngaphakathi koketshezi noma inqubo, lezi zifudumezi zonga amandla cishe ngamaphesenti ayi-100.Lawa mashitha ahlukahlukene angabuye akheke futhi alolongelwe amajiyometri ahlukahlukene ukuze ashise ngokukhazimulayo kanye nezinhlelo zokusebenza zokushisisa endaweni yokuxhumana.