Poyankha zovuta zomwe dipatimenti yamagetsi ya US Department of Energy, Porvair Filtration Group yapanga zosefera zamtundu wambiri, mphamvu zambiri, zosefera za HEPA, zomwe zimatha kuthana ndi mpweya wambiri pazovuta zamitundu yosiyanasiyana m'malo achinyezi.

Mkati mwa ma voliyumu akulu, makina osefera mpweya wa HEPA amazungulira mpweya m'malo oyenda alaminar, ndikuchotsa kuipitsidwa kulikonse kochokera mumlengalenga kusanabwerenso ku chilengedwe.

Zosefera zamphamvu zamphamvu kwambiri za Porvair za HEPA zitha kusinthidwanso m'malo omwe alipo m'malo ambiri azamalonda ndi nyumba. Ntchito zodziwika bwino zimaphatikizapo zipatala, nyumba zosungirako okalamba ndi opuma pantchito, malo ochereza alendo, maphunziro ndi malo antchito.

Zosefera zitha kugwiritsidwanso ntchito m'mafakitale a HVAC pakuyeretsa malo omwe amachitika pomwe njira zovuta zikuchitidwa monga kupanga ma microelectronics ndi kupanga biopharmaceuticals.

Zosefera zokhala ndi zovomerezekazi zimatha kupirira zovuta zosiyanitsa kwambiri kuposa zinthu zosefera zagalasi za HEPA. Itha kupiriranso kutayika kwamphamvu (chifukwa cha kuchuluka kwa dothi) m'malo onyowa komanso owuma komanso olekanitsa ovomerezeka a Porvair omwe ali ndi chilolezo amaonetsetsa kuti pali zovuta zochepa zosiyanitsira pamadzi othamanga kwambiri.