Icechallenge

Here you can find monre information about Ice challenge that takes place in Belgium. I think the first place was in Brussels, the link above points to the results (in French, Flamish is also available here but nothing in English). For an interesting project like this one, English language should have been an option, but I'll try to do my best to explain it.
At the same start date, 2 block of ice weighting 1 ton each were put in 2 different cases, with the symbolic shape of 2 houses, one is well insulated and the other one is pretty basic, and both of them are passive: there is no electric device inside to keep them cool.
After 11 days the block of is completely melt in the red house (the one which is badly isolated), and at day 0 + 44 the second house, the green well isolated one, is openned to weight the amount of remaining ice: 456,673 kg of remaining ice, so 45% remaining after 44 days! Pretty good deal for your house.
I think this was an interesting project in Brussels, because obviously, if you were in Brussels during those 44 days, you must have see those 2 blocks: flashy red and green, and should have read about it thanks to the information available on site. The conclusion, is that a well insolated house is something like 7-8 times more efficient at keeping its energy than a standard one, only with passive isolation! There are many more active means to improve your house energetic autonomy. Interesting, to see how big is the gap!