Air used, the quicker the room will

Air temperature is one of the main factors affecting human comfort, the internal temperature of a building is dependant on the external temperature and the U-vales of the materials used to construct the building, meaning the lower the U-vale the more effective the material is at retaining heat. This can dramatically affect human comfort as the higher the U-values used, the quicker the room will lose heat through convection. By using the U-values of materials we can calculate the total heat resistivity of a building and then create a comfortable environment in which to live. Another factor affecting human comfort is the humidity of a building, this is the amount of water vapour in the air. Humans cool down mainly by sweating but in an environment with 100% humidity it is not possible for the sweat to evaporate into the air, this is called absolute humidity. Anything below 30% humidity can feel uncomfortably dry and anything above 60% can feel uncomfortably wet or damp. Air velocity is another crucial factor affecting human comfort, this is the movement of air through the room or building. Warm air can enter a room and push the cold air downwards creating a draught, in a cold environment this draught can make a person feel even colder. In a warm environment this draught can increase heat loss through convection and help to cool someone down by increasing the rate that their sweat evaporates.


I'm Casey!

Would you like to get a custom essay? How about receiving a customized one?

Check it out