Just a few small points... Reimantic water is salt- and mineral-free, so it's pretty much distilled water. Drinkable, yes, but probably not very palatable - and, quite surprisingly, an electric insulator rather than a conductor (at least upon creation). Reimantic air has the default nitrogen/oxygen/rare gas ratio.
As for the explosive release of air Res, it's pretty much the main reason for creating air instead of drawing it from the environment (the other use of Res). Keep in mind it's not all about quantity: pressure plays a crucial role too. A gas is highly compressable and even a modest amount of air can cause damage on a limited scale if the pressure is high enough. Sort of like people getting serious hand injuries from firecrackers. What you would do is create air in a very small volume and let the physics run its course. This is the crudest version, of course, in which the release is equally strong in all directions. To obtain a directed gale-like effect you would need to shape your res-ball accordingly - i.e. not a perfect sphere nor one with uniform pressure to begin with. A continuous effect would be even more complex.
There's a lot of technical info like this that's in my head and waiting to make it to the Reimancy article. The good news is, you don't need this level of detail in most cases.