We usually set the fan speed to keep the temperature rise of the air passing through the system between roughly 40F-65F depending on the age and efficiency of your system. So, return air temperature may be 70F which means that the supply air measured in the furnace would be 110F to 135F.
exists and is an alternate of . Carbon dioxide is denser than air. The density of carbon dioxide is 1,977 g/L at 0 0C and standard pressure. The density of air (the so called International Standard Atmosphere) is 1,225 g/L. Carbon dioxide is denser than air. <br /> The density of carbon dioxide is 1,977 g/L at 0 0C and standard pressure. <br /> The density of air (the so called International Standard Atmosphere) is 1,225 g/L.
so while carbon dioxide contributes less to the overall greenhouse effect than water vapor scientists have found that carbon dioxide is the gas that sets the temperature carbon dioxide controls the amount of water vapor in the atmosphere and thus the size of the greenhouse effectarbon dioxide causes about 20 percent of earth s greenhouse effect water vapor accounts for about 50 percent and clouds account for 25 percent the rest is caused by small particles aerosols and minor greenhouse gases like methane