Why is the igloo not cold?

Because igloos can play a very good role in keeping out the cold.

After the completion of the igloo, there are almost no gaps for cold air to blow into the room. Moreover, the building material of igloo-ice brick, because it is a bad thermal conductor, can play a good role in heat insulation. The door of an igloo generally faces in the direction perpendicular to the wind direction, and it is very low, which makes it impossible for cold air to enter the room to form convection.

The outdoor ambient temperature in the Arctic can reach 50 degrees below zero, while the indoor temperature in the igloo can reach several degrees below zero to more than ten degrees. Generally, there is no problem of indoor icing, because the temperature near the ice wall is always lower than the melting point. If you want to make the room warmer, the Inuit will hang skin on the interior wall, but the air between the skin and the ice wall can't rise to a higher temperature because of the thermal insulation of the skin.

Extended data:

Some experts have studied the warmth of igloos, and they have come to the conclusion that conduction, convection and radiation are important factors to keep igloos warm. First of all, ice is a poor conductor of heat. When Eskimos build igloos, they fully consider the characteristics of gas convection-hot fluid moves upward and cold fluid moves downward;

Therefore, half of the igloos they built are buried underground, and the doorway is extremely low. There is a long passage into the igloo, and thick skin is hung at the entrance, so that the warm air generated in the igloo gathers upward, not only the heat in the igloo is not easy to be lost, but also the room is warmed by the convection of hot and cold air.

Secondly, the bright ice shell on the inner wall of the igloo can reflect the radiated heat back, effectively preventing the heat in the house from spreading outward, thus ensuring the balance of indoor temperature.

People's Network-Exploring the Arctic igloo: There are three wonders.