Cold convective air currents, formed by warm room air hitting the cold window surface, create discomfort at the occupant’s feet and ankles. The strength of these currents depends on the height of the window pane, as well as the interior temperature of the glass.
To minimize downdraft discomfort, try:
– decreasing the window height
– decreasing the window U-Value
– using a glazing assembly without a room-side low-e coating