Izici ezijwayelekile zezemvelo zeshabhu yokulungisa (kuhlanganise nendawo yokulungisa umhwamuko) yesitolo semoto ye-4S yilezi:
Indawo yokusebenzela ngokuvamile iphakathi kwamakhulu nezi-2,000 zamamitha-skwele, futhi indawo enkulu yobude icishe ibe ngamamitha ayi-10. Ngenxa yokuthi izimoto nabasebenzi bavame ukungena futhi baphume, ngokuvamile iminyango namafasitela avuleka kancane. Ngaphezu kwalokho, umthelela wesimo sezulu esibanda kakhulu ngaphandle, ngakho-ke indawo yokusebenza yasendlini idinga ukusebenzisa i-mechanical exhaust futhi iphole. Njengamanje, izitolo eziningi zezimoto zasekhaya ze-4S zifakwe kubalandeli bodonga bendabuko noma abalandeli abamile ukuze zomiswe izinwele zendawo. Ngenkathi eshisayo, empeleni kuwumoya oshisayo womoya omncane. Indawo ezungezile iphinde inqume ukuthi ama-air conditioner endabuko (adinga ukusetshenziswa endaweni evaliwe) ayikwazi ukusetshenziswa ngokujwayelekile futhi efrijini, ngakho-ke azikho izixazululo ezinhle ngaphambili.

Ngomzamo wokuhlola izixazululo zokwenza umoya omncane onekhabhoni kanye nezisombululo zokupholisa eminyakeni yamuva nje, i-Guangdong XIKOO iziqeqeshe ngempumelelo izixazululo zokupholisa umoya wesitolo semoto engu-4S. Incazelo yesibonelo elandelayo:

Lesi sixazululo ngokungangabazeki siyisixazululo esisebenzayo sokwenza kahle. Lapho ihlobo lishisa ehlobo, inhlanganisela yesiqandisi kanye nefeni enkulu ingasetshenziswa ukuze kuzuzwe umphumela omuhle kakhulu wokungenisa umoya nokupholisa. Izimoto zasendlini zingavulwa ekwindla ngqo. Ngesikhathi esifanayo, umoya omncane usawugcina umphumela othile wokupholisa. Ochwepheshe bokukhanda izimoto bayisisekelo senkonzo kanye nenzuzo. Abasebenzi bezobuchwepheshe abalungile kufanele bakwazi ukugqugquzela ukuqashwa nokugcina abantu futhi bathuthukise indawo yokusebenza. Akungabazeki ukuthi kuyisinyathelo esisebenzayo ukuqasha abasebenzi. Inani eliyingqayizivele.