Supply factory direct pipeline fan exhaust fan silent split ducted fan DPT16-5 Tel: 18653444408 Manager Wu Features: 1, Shell: be deep-drawn quality cold-rolled iron mold stretching. Surface spray treatment with a strong ability to engage in eclipse. Computer optimized flow channel design, the impeller produces maximum efficiency. Inlet and outlet of the same diameter, according to the standard pipeline design, ease of installation, maintenance and cleaning. Specifications Φ100mm; Φ125mm; Φ150mm; Φ160mm; Φ200mm; Φ250mm; Φ315mm 2, impeller: diameter Φ190mm; Φ220mm; Φ250mm; Φ280mm; Φ315.. For the backward curved impeller blades designed impeller and housing overall have good cooperation, the fan can produce the maximum air flow and maximum efficiency, most's noise. 3, the outer rotor motor: single-phase asynchronous external rotor motor, outer rotor of the motor, impeller and motor directly from the rotor by press-fit, the impeller is directly driven by the rotor, can greatly reduce the fan size, and smooth operation, high efficiency and long life. 4, junction box: The flame-retardant fiber plus PVC material injection. Fire performance, use of safety. Outside the chassis, wiring easy disassembly 5, quality assurance: 5 years motor insurance.