I have this particular one in a big transparent flower point potted up like a phal with bark, but even looser and no sphagnum moss - although I might add some come summer. I dunk it and soak it when the roots have gone silver, for about 30 minutes, or until the roots looke juicy and fully green (as opposed to streaky like it's been sprayed). It is hanging in a south east facing window (my bedroom), getting full direct light at the moment. I will need to consider moving it when the days get a little bit longer and less cloudy. This will be it's 3rd flowering as long as I don't bugger it up somehow. I try using fish tank water for it, but sometimes just use tap, but I understand that vandas are greedy, so it probably prefers the nitrates in the tank water.
There is no additional ventilation in the room, but when I am at home in the summer I do have loads of windows and doors open around the flat. I seem to remember worrying a bit about this last year, but my two plants came through the summer fine.
It definitely is not as floriferous as Elena's but it seems to like this treatment to perform beyond what I had expected - which was, quite frankly, never to reflower and possible death within the first 6 months. Seeing as I live in London, grow on a windowsill, and have no additional lights or humidity controls for it's grow area, I think that to find it spiking at this time of year after a grey and dismal winter is pretty much evidence of how good this plant is for vanda lovers and beginners who don't have ideal conditions.
I hope this additional information helps - let's hope that one day I can get my Vanda Gordon Dillon cross to spike - so far it has been a year since it's one spike withered up and died, and not a sausage has been seen since. I think that if you get one that has the reputation of being really easy to rebloom, you will be fine to try it.
I hope this additional input from me helps.