pilotmike21
New member
...heated for more efficiency? In a Babcock Wilcox boiler the air for combustion is preheated before being mixed with the fuel and I have been told that this decreases the amount of energy that is needed to heat the air to the correct temperature for combustion. This seems to contradict the whole concept of a "cold air intake" in a car in which cold air carries more molecules for a given volume thus providing better, more complete combustion.