> and reduce the drafty feeling. While the feeling may be similar to a draft (moving air), the actual phenomenon is radiant heat transfer. The warmth we feel i

> and reduce the drafty feeling. While the feeling may be similar to a draft (moving air), the actual phenomenon is radiant heat transfer. The warmth we feel is not just air temperature (which can be less than half), but also the surface temperatures: * https://en.wikipedia.org/wiki/Mean_radiant_temperature https://en.wikipedia.org/wiki/Mean_radiant_temperature * http://www.healthyheating.com/Definitions/Mean%20Radiant.htm http://www.healthyheating.com/Definitions/Mean%20Radiant.htm If you sit near a heating radiator, fireplace, or campfire, you will feel warm because energy goes from high concentration (fire) to low/er concentration (your body). But if you sit near a badly insulating window, your body has the higher amount of energy (heat) so energy goes from you to the window. You are the radiator for the window; the window is an 'anti-radiator' (it 'attracts' heat).