i had 200 foot out last night, with no loss of suction and steam pooring out the wand,
up a path, through a front door along a corridor up 2 flights of stairs through a door, through a wheelchair storage lobby along another corridor, down a small flight of stairs into a day room, tell ya what, its hell of a trek.
15hp prowler would do the same no problem. very rare you'd need much more.
derek