A visual example

I took a lot of pictures of all the buildings on camp with a thermal camera to see where the heat loss was. Black means cold (low heat loss) and white means warm (high heat loss). The first two are of Longs Peak, where you can see that the new window on left is black (not letting the inside heat escape) but the window on the right is white (the inside heat pouring out!). See what a big difference the new windows make?

 

                                         The picture above is the water treatment plant.
                                                      The picture below is the entry of Winter.