Iifeni zeHigh Volume Low Speed ​​(HVLS)Zibonakala ngobubanzi bazo obukhulu kunye nesantya sokujikeleza esicothayo, nto leyo eyahlula kwiifeni zesilingi zemveli. Nangona isantya sokujikeleza esichanekileyo sinokuhluka ngokuxhomekeke kwimodeli ethile kunye nomenzi, iifeni ze-HVLS zihlala zisebenza ngesantya esiqala malunga ne-50 ukuya kwi-150 revolutions ngomzuzu (RPM).

Igama elithi “isantya esiphantsi” kwiifeni ze-HVLS libhekisa kwisantya sazo sokujikeleza esicothayo xa sithelekiswa neefeni zemveli, ezihlala zisebenza ngesantya esiphezulu kakhulu. Olu sebenziso lwesantya esiphantsi luvumela iifeni ze-HVLS ukuba zihambise ngokufanelekileyo umoya omninzi ngelixa zivelisa ingxolo encinci kwaye zisebenzisa amandla amancinci.

Isantya sokujikeleza kwefeni ye-HVLS senzelwe ngononophelo ukuphucula ukuhamba komoya kunye nokujikeleza kwawo kwiindawo ezinkulu ezifana neendawo zokugcina impahla, izakhiwo zokuvelisa, ii-gymnasiums, kunye nezakhiwo zorhwebo. Ngokusebenza ngesantya esiphantsi kunye nokuhambisa umoya ngendlela ethambileyo nehambelanayo,Iifeni ze-HVLSingadala imeko-bume ekhululekileyo nengena umoya kakuhle kubahlali ngelixa inciphisa ukusetyenziswa kwamandla kunye neendleko zokusebenza.