Thanks for the suggestions
In a first step i will install two sheets of isolated windowglas with an airslit between. I hope this will give me room temperature in the orchidarium. As you see in this post
http://www.neovita.com/orkideer/bild...817.5.orig.jpg I just love Sophronitis and they are not very happy with 20 degree celsius (78 F)
. Therefore the longtime plan is to install active cooling in the orchidarium.
This is though still in the idée mode so the timeframe may be 1-2 years..... IF I have the time and money....