... installation 4.new design and surface 5.high air flow,low noise Main Feature:1. Full-automatic LCD speed controller, easy ... mute sound type nylon fan blade, big air output,low-energy consumption,low noise.3. Injection-moulded cabinet, pp homopolymer engineering material ... fluency,automatic clearing,no jam.This Moldel:XK-18S Voltage/frequency: 220V/50HZ~60HZ Air flow: 18000m3/h Power: 1.1KW ...