Using a Shark Vacuum without the brush roll is generally not recommended. The brush roll is specifically designed to agitate carpets and lift dirt, debris, and pet hair from surfaces, enhancing the overall cleaning performance. If the brush roll is removed, the vacuum may still be able to function as a suction-only device, but its effectiveness on carpets will likely diminish significantly. On hard floors, the vacuum might still work adequately, but it may not pick up fine particles and debris as efficiently. If a specific cleaning task does require operation without the brush roll, it is advisable to consult the manufacturer's user manual for that particular model. The manual often provides guidelines on how to modify settings for different surfaces. For more information on your specific model, the Shark Vacuum website may offer additional guidance and resources.