A:Answer Approximately 2,500.. this is up from 2,000 in the i7, which is 4x the power, and 40x the power of the 600 series.
In real life.... it does excellent on hard floors and tile and rugs. On carpet it kicks into high suction and cleans surface dirt and a bit more. I have a medium length carpet that is extra thick and dense. It still does great, but will need the big upright (I have a Kirby) every once in a while, depending on the traffic in that area. For the guest bedroom, maybe once every 3 months. Hope this helps.