Quạt hút khói is a free Chrome extension designed to help users quickly estimate the prices of smoke fans. By providing a simple interface, this tool allows users to select from various smoke fan types, enter the desired quantity, and receive an estimated price range. The extension is particularly useful for individuals looking to make informed purchasing decisions without extensive research.

To use the extension, users need to install it in their Chrome browser and click on its icon in the toolbar. From there, they can choose the specific type of smoke fan, input the quantity, and click the 'Tính giá' button to generate an estimated price along with basic product information. While it offers convenience in price estimation, users should note that actual prices may vary based on suppliers and purchasing timing.