just took delivery of airflow twin vac great little machine couple small issues, mainly bolts not been titghtened up , small teething proplems, does great job , my last machine was all tec again brill machine , the airflow doesnt have a fitted , heater ,which i need you be amazed, at the no of propertys you go too , and theirs no hot water , got heater box also which does what it says , slighlty lighter than the altec 40, and easier to carry up 3-4 flights of stair in the old tenments flats ,in and around edinburgh , ps does any one know who does the ground , floor ones , !!!!!!!!!!!