Mtundu wa fan padenga womwe umatulutsa mpweya wambiri nthawi zambiri ndi High Volume Low Speed ​​(HVLS) fan.Mafani a HVLSamapangidwa makamaka kuti azisuntha mpweya waukulu bwino komanso mogwira mtima m'malo akuluakulu monga malo osungiramo katundu, malo ogulitsa mafakitale, malo ochitira masewera olimbitsa thupi, ndi nyumba zamalonda. Mafani a HVLS amadziwika ndi masamba awo akuluakulu, omwe amatha kufika mamita 24, komanso kuthamanga kwawo pang'onopang'ono, komwe kumayambira kuzungulira 50 mpaka 150 kusintha kwa mphindi (RPM).Kuphatikizika kwa kukula kwakukulu komanso kuthamanga pang'onopang'ono kumathandizira mafani a HVLS kupanga mpweya wofunikira kwinaku akugwira ntchito mwakachetechete komanso kuwononga mphamvu zochepa.

Poyerekeza ndi mafani amtundu wapadenga, omwe amapangidwira malo okhalamo ang'onoang'ono ndipo nthawi zambiri amakhala ndi mainchesi ang'onoang'ono amasamba komanso kuthamanga kwambiri kozungulira, mafani a HVLS ndi othandiza kwambiri pakusuntha mpweya kumadera akulu. Amatha kupanga kamphepo kayeziyezi kamene kamayenda mozungulira mpweya m'malo onse, kuthandiza kukonza mpweya wabwino, kuwongolera kutentha, komanso kupanga malo abwino kwambiri okhalamo.

Ponseponse, ngati mukuyang'ana chofanizira padenga chomwe chimatha kutulutsa mpweya wambiri pamalo akulu, aMtengo wa HVLSmwina ndiye njira yabwino kwambiri. Mafani awa amapangidwa makamaka kuti apereke mawonekedwe apamwamba a mpweya ndipo ndi abwino kwa mafakitale ndi malonda omwe kusuntha kwa mpweya kuli kofunikira.