Without the tank, the dispenser is only 80 x 80 x 220 mm (WxDxH), as small as a regular-sized water flask. It is compact and easy to be carried around. Simply add on the water bottle valve connector (or water pipe) that comes with the unit and you are good to go. Even with the water tank attached, the unit is lightweight and space-saving. Plug it into a 13A power outlet and it essentially fits into any corner in your house or office.