The Arctic patio heater is a brand name that strongly suggests the aim of the unit - keep patio users warm into the colder months. I doubt it would really do the trick in the Arctic itself, but the idea is plain enough.
The Arctic is one of the well known names in the world of outdoor patio heaters, all of which work on roughly the same principle - using bottled gas they provide a heat umbrella of warm falling air that allows the users to keep wearing short sleeves outside long after the normal summer season has said farewell.
There are plenty of examples of these things in action that you can try out before you buy - commercial patio heaters are becoming a common site at many bars, cafes and restaurants that have outside space. Anyone in northern climes is probably very familiar with them. So go along, have a coffee or a beer late at night and see what you think!
If you decide to go with a gas patio heater, you would be well advised to go with a brand you have heard of, since they have probably more experience in the market and spent more time making sure their products do what they claim. After all this is quite a new market and you want to buy something with any safety features perfected and any bugs ironed out!