It's just a big henry the hoover...
That's what I say on a daily basis when our customers are soo impressed and fascinated by the equipment we use. Our vacuum of choice is a twin motor 2400w wet and dry Numatic. Numatic are a british company who also make the famous Henry the hoover.
Our vacuum doesn't have a name sadly but if you have any ideas let us know!
Using a powerful vacuum like this enables us to reach up to around 40ft, and as you can see in this photo taken today at a job in Hampton we have a long 15m hose as well and the suction achieved at the top of the poles is still very powerful.