With temperatures hitting 25C today this has been the first real test of our house in terms of overheating and how to manage excess heat.   When I designed our house, I crunched the numbers, taking into account average and peak daily solar gain.  Due to the large amount of SW facing glass that we have, I knew we were going to have some overheating, based on maintaining an internal air temperature of 21C.  My number crunching indicated that summer overheating resulting from solar gain c