Since nobody can answer my question, I'll do it for you. The machine with the 2-13.5 amp vacs in parallel. Even though it has less lift, it has a ton more airflow which makes the wand stick to the carpet. Most tm' are capable of the same lift. Those with larger blowers also give you more airflow, which will put the available lift where you need it. At the wand. Cranking up the lift on a small blower doesn't give you dryer carpets. It actually reduces your air flow. If you want to run longer hoses, you need more air flow (larger blower) not more lift. A #3 blower produces exactly the same lift as a #5 blower.