Provided that you dont have a gazillion boxes theres a few options. I once checked into a large thermoelectric chiller for my wall cabinet & for the appropriate unit, they told me it would be around 7-8K in price! Not sure what the voltage there in Scandinavia is but heres a few other possible options depending on your budget & amount of cigars that need attention...
1) A Coleman style cooler with temp control. 16qt.
http://www.newsearching.com/camping_...ic_Cooler.html
2) A wine chiller/refrigerator with a modified thermostat to keep boxes of cigars 65-70F. Available in many sizes & price ranges.
http://westsidewinecellars.com/wine_coolers_1.html
3) A chiller / temperature for an existing room or large cabinet. Not cheap, but think of the investment of whats on the inside of a large cabinet.
http://www.vinotemp.com/frame.htm