Negative Pressure fan Motor Series
Fan penting negative is nggunak konveksi air, patutum ventilation negatif, yai nggak sit ing pangingi-suh patong utawa winda sing alami ngasuh air fresh, gas ot sing cedhak diaktaksa kaluh kaluh teremok, masalah ventilasi sing apik isa dipikis, Epektik ventilasi cooling isa teka 90%-97%.
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