Help needed on a Ducted Mini split system

I enquired from these guys (Link below) that this was a good system for a studio but wanted my studio builder to fit it rather than these guys http://www.orionair.co.uk/Music_Studio_ ... oning_.htm This is what I am thinking of buying http://www.orionairsales.co.uk/fujitsu- ... u-57-p.asp My Studio Builder has done many Split ductless systems in over 50 studios but I have had a split before and wanted to try a ducted system which he is less sure about. Here is a plan of the studio (http://gallery.me.com/mrmikis#100040/St ... olor=black) and how I think the system could be connected... I have read many posts and am aware that there is no fresh air outlet but the engineers at the HVAC company said that if you run the system on fan only when no heat or cooling is needed, this would take care of this. Is this efficient? Also, There is no return air supply from the Booth. Again the HVAC company said that they have installed many like this and as the booth door is always opening and closing, this is not a problem. They also suggest Attenuated Flexable ducting but i have read from Rod that this stuff is not very good in studios. My studio is only small 5 x 5 meters... Am I mad going down the ducted route? Any help you can give would be great... Thanks Very much in advance. Mikis