The Perfect Temperture
The human body is very sensitive to small differences in temperature. Even having your feet two degrees cooler than your head is a noticeable and uncomfortable temperature difference for most of us. A Passive House is designed to keep all temperature fluctuations within the home smaller than this range.
This means that even glass surfaces will be warm to touch in a Passive House. Sitting in a chair in near a large window should be comfortable even on a cold and windy night.