DESC: This powerful machine is great for large rooms or to use as a central unit in a home or office. It has a variable speed motor so you can turn it up to clean the air quickly and lower it when you need to. Moving the unit around is easy because it's mounted on smooth glide casters. By adding the optional activated carbon/zeolite canister the 3000 literally makes odors vanish! The 3000 sleek design comes in white or jet black and blends in anywhere.