New Rented Studio, Air Con issues!!

I've just taken on a small soundproof room in a music complex in East London, the room is basic but seemingly pretty well put together. Its a room within a room design (3m x 4m roughly maybe a little larger) with about 1 foot between each stud partition wall, it has no windows but a fresh air duct (30cmx30cm) which stretches through an office to the outside world. The air duct has a fan on it currently which can either bring in cold air or expell it, I haven't worked there yet but I know its going to get too hot without air con. So here is my main question!! Whats the best thing to do in my situation, I've not got loads of cash to spare but this is going to be pro level setup with visiting clients etc (don't want to see me mixing in my pants!!). The other thing is its on the top floor of an old office block (not sure if there is access to the roof). Would probably want to spend maximum of £500 and ideally retain fresh air in as well as cooled air and heat in winter! Hope that makes sense, thanks for your help in advance!!

There is an announcement at the top of the forum about what to do to assure getting as many responses as possible. The announcement leads to this post (click here). Actually, several people, who are experts on this forum, will not reply if you don't do what is written in that post. Many others who are very helpful, will not reply out of respect for the moderators' wishes. But for what you want to do, a mini-split air conditioning system is the only possibility, and even then it is going to cost you more than what you mentioned, probably. Also, that reversible fan doesn't sound like a workable solution, since you need to do both at once. In order to be "soundproof" the room must also be air tight. If it is air tight, then that fan will have no effect, since it will be trying to inflate the room like a balloon, or suck air out of it. It will only move a little bit of air before reaching the pressure differential at which it cannot do any more. To get the idea: put your mouth over an empty Coke bottle, and suck. How much air can you get out? Just a bit. Your lungs can only reduce the pressure so much, and when the pressure inside the bottle gets to that level, you cannot get any more air out. Now stick a straw into the bottle, between your lips and the bottle neck. so that it poke out into the air. Now suck. You can suck all day if you want, since the straw allows fresh air in to replace what you are sucking out. The same thing happens with your room: you need tl let fresh air in, at the same rate that the fan removes it. So you need TWO ducts, one to let fresh air in, and the other to take stale air out. And you also need a mini-split air conditioner, to cool / heat the room, as needed. - Stuart -

Stu, You got me thinking right there: If thats the case, can you just leave a "passive" air inlet ducting? I mean, one fan pulling air out, while just having a duct connected to the outside world, getting air in by just pressure change? without using another fan to blow air in i mean... :?: