I-Holtop iphuhlise ngempumelelo uthotho olutsha lwee-ventilators zokubuyisela ubushushu, ezixhotyiswe nge-counterflow plate ephezulu yohlobo lokutshintsha ubushushu be-aluminium. Ukusebenza kakuhle kunokufikelela kwi-85%, kwaye yinqanaba eliphambili lobuchwepheshe bokubuyisela ubushushu e-China.
