Uhlobo lwefeni yophahla olukhipha umoya omningi ngokuvamile yifeni ye-High Volume Low Speed ​​(HVLS).Abalandeli be-HVLSzenzelwe ngqo ukuhambisa umoya omningi ngendlela ephumelelayo nephumelelayo ezindaweni ezinkulu njengezindawo zokugcina impahla, izikhungo zezimboni, izindawo zokuzivocavoca, kanye nezakhiwo zezentengiselwano. Amafeni e-HVLS abonakala ngama-blade awo amakhulu, angafinyelela kumamitha angu-24, kanye nesivinini sawo sokujikeleza esihamba kancane, ngokuvamile asukela ku-50 kuya ku-150 ngomzuzu (RPM).Le nhlanganisela yobukhulu obukhulu kanye nesivinini esisheshayo ivumela abalandeli be-HVLS ukuthi bakhiqize ukuhamba komoya okukhulu ngenkathi besebenza buthule futhi besebenzisa amandla amancane.

Uma kuqhathaniswa namafeni ophahla avamile, aklanyelwe izindawo zokuhlala ezincane futhi ngokuvamile anobubanzi obuncane bama-blade kanye nesivinini esiphezulu sokujikeleza, amafeni e-HVLS asebenza kahle kakhulu ekuhambiseni umoya ezindaweni ezinkulu. Angadala umoya opholile ojikeleza umoya kuyo yonke indawo, esiza ekuthuthukiseni umoya, ukulawula izinga lokushisa, kanye nokudala indawo ekhululekile kakhulu yabantu abahlala kuyo.

Sekukonke, uma ufuna ifeni yophahla engakhipha umoya omningi endaweni enkulu,Ifeni ye-HVLScishe kuyindlela engcono kakhulu ongakhetha kuyo. Lawa mafeni aklanywe ngokukhethekile ukuze alethe ukusebenza okuphezulu komoya futhi alungele ukusetshenziswa kwezimboni nezentengiselwano lapho ukunyakaza komoya okuphumelelayo kubalulekile khona.