We did have the windows open, and the put some fans, but still was quite unbereable. Especially because of all the computers. We did have a lot of fights with the company for this, as spanish law dictates a maximum temp for a working space. Some days, when it was over 40ºC inside, it was like an oven (literally it was better to go outside below a tree or something), we ended up walking out of the office, fuck that shit.