Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?
Options:
Answer:
Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about 20 percent as compared to the use of atmospheric combustion air.
