Depending on the situation, dust, moisture, and outside noises could also be pulled into the house. However, if used properly, the whole-house fan can be very beneficial in Louisiana. Size the CFM of a whole-house fan to remove four complete volumes of air per minute from a dwelling that is 30' wide and 45' long with an 8' ceiling height. Divide the class in two groups and ask them to list ways in which fans can reduce use of air conditioning. Fans can help reduce cooling cost.
Air circulating fans make the human body feel cooler by radiation.
Air circulating fans allow human comfort at higher temperatures. Ceiling fans use about the same amount of energy as a 100 watt light bulb. Exhaust fans are used to add moisture to an area. Louisiana doesn't have enough humidity. Attic fans are used to ventilate the house.