Fani yonyamulika ndi fan yoyenda ndi voliyumu yambiri. M'malo enaake, fan ya denga la HVLS singathe kuyikidwa pamwamba chifukwa cha malo ochepa, MDM ndi yankho labwino kwambiri, mankhwalawa ndi oyenera njira zopapatiza, denga lochepa, malo ogwirira ntchito okhuthala, kapena malo omwe mpweya wake uli wochuluka.