Additional Features on the B 3847:

Air Inlet: Yes

and the reinforced fan has a lifetime warranty

[custom_html] Get the most out of your TriStar and Compact Canister vacuums by using EnviroCare Micro Filtration vacuum bags

This is achieved because the cyclonic has been redesigned and is able to separate dust so efficiently form the air that only a very small amount will ever make it to the filter

iRobot Side Brush Module Panasonic Vacuum Filters Additional Features on the B[custom_html] The side brush module on your Roomba is simple to replace and snaps in quick and easy. The side brush module includes screws and is compatible with Roomba 500, 600, and 700 series robots. [ custom_html]