POLMAK Co. LTD. has began manufacturing with polishing and emery machines by Hasan ÖZCAN in Karaköy-İstanbul in 1977.
These fans are in group of forward-curved (FC) blade fans. FC fan blades lean towards the rotation of the impeller. These fan give large amounts of air flow at low static pressures. However these fans work at the lower efficiencies.
Centrifugal roof fans are used for environments where air changes are necessary to keep to room ventilated and suction of vitiated air, flue gases and vapour.
These fans are in group of backward-curved (BC) blade fans. Belt-driven motor is used. These type fans’ blades lean backwards the rotation of the impeller. This fan’s performance characterized by high-efficiency, large air flow, rigid construction.