I-Holtop ithuthukise ngempumelelo uchungechunge olusha lwama-ventilators okubuyisela ukushisa, afakwe ngokusebenza kahle okuphezulu kwepuleti le-counterflow uhlobo lokushintshanisa ukushisa kwe-aluminium. Ukusebenza kahle kungase kufike ku-85%, futhi izinga elihamba phambili lobuchwepheshe bokubuyisela ukushisa e-China.
