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.
Helium is lighter than air. Youâll usually hear the phrase, âhelium is lighter than air,â but thatâs not entirely accurate. Itâs actually more appropriate to say that helium is less dense than air. Thatâs because helium molecules are not packed together as densely as air molecules are. It is this simple reason that helium balloons float in the air. Itâs also the key to understanding why helium balloons deflate faster in cold air. Answer: They donât. Yes, itâs true that your helium balloon may have shriveled up and is now resting on the cold floor instead of floating in the air.