That literal sentence? But if you watched the first video, at the 3:25 mark it is mentioned that there is barely any air exchange with the environment (I'm gasp

That literal sentence? But if you watched the first video, at the 3:25 mark it is mentioned that there is barely any air exchange with the environment (I'm gasping for air at the thought of it), and at 5:45 you see a heater in front of a window, which implies using air as the medium of heat transport[0][1]. Hence, convection heating. Look, I don't know the Passive Housing standard, I'm inferring based on the information given in the video and article. If I'm wrong, don't just say "this is incorrect", tell me what the standard actually is. [0] https://www.youtube.com/watch?v=zXV_RqAUbho&t=3m25s https://www.youtube.com/watch?v=zXV_RqAUbho&t=3m25s [1] https://www.youtube.com/watch?v=zXV_RqAUbho&t=5m44s https://www.youtube.com/watch?v=zXV_RqAUbho&t=5m44s