Usha Crisp Air Premia Af 150 mm Exhaust Fan Series:Crisp Air Premia AF Dimension:21.8x19.8x13cm Color/finish:Silver Sweep:150mm Voltage:230V Material:Stainless Steel Speed:1800RPM Power:21W Air Delivery:350 m3/Hr Includes:Ventilating fan,Instruction manual and Warranty card Designed to be noticed,this exhaust fan comes with hidden blades and easy screwless instalation for low noise performance.Ideal for mounting on a wall,ceiling or glass Axial throw fan with hidden blades and streamlined modern design Removable screwless front panel for easy cleaning Easy screwless installation and low noise performance Usha Crisp Air Premia window ventilating fan Please Note:150 mm is the Sweep Size (Blade Diameter) of the Fan and should not be confused with the Frame Size Dimensions.Please refer to the scaling diagram provided for information on product dimensions Removable screwless front for easy cleaning The Crisp Air Premia exhaust fan by Usha effectively controls the quality of air in an enclosed kitchen space or bathroom by getting rid of moisture,smoke,fumes and bad odour.The automatic back shutter operation and strong,rust-proof body makes this window ventilating fan the very best in its category and ensures that you don���t have to worry about changing it for a long time.The chic white color of this Usha exhaust fan lends it an elegant appeal.Sweep size mentioned in product title is the dimension (diameter) of the blade.It should not be the sole criterion for you to make a purchase decision.Before buying an exhaust fan,it is important to consider a few other factors such as the dimensions of the duct (length,width),available space around the duct from the ceiling or side walls,whether installation is done on glass or concrete wall,etc.Accurate knowledge of the duct dimensions will help you make precise comparisons with the dimensions provided in the image.This will best serve your purpose and make your purchase seam