I got my new Arduino, yay! Soon you'll be able to see whether the condensate reservoir in my cellar is emptying or not and check out the nice stable temperature all year round.
Last thing to do is mount the stack of boards in a box to keep the dust off but I've not found anything suitable. I'm using up an Ethernet shield and screw shield that I have kicking around, neither of which I can see myself using for anything else. Stacked up they make the thing quite ridiculously bulky for what it does. So it's all just going to have to get stuffed into a big box. It's not like it's going to be on show, it'll be sitting in the cellar.