MODEL 300 COMBUSTION ANALYZER
Instruction 24-9223
G-1
GLOSSARY OF TERMS
AMBIENT AIR
The atmosphere external to the furnace, appliance or process.
CALIBRATION
Comparison of an instrument of lesser accuracy with another stan-
dard of known accuracy (calibration gas) to detect, correct and adjust
for instrument accuracy.
CARBON DIOXIDE, (CO
2
)
A colorless gas, heavier than air, formed by the complete combustion
of carbon, and the Chemical symbol for Carbon Dioxide.
COMBUSTION EFFICIENCY
Percent of the available fuel energy that the furnace turns into
useful heat.
CONDENSING FURNACE
A high efficiency furnace where water vapor, generated by the
combustion process, is condensed and its latent heat of vaporization
recycled back into the furnace’s heat exchanger.
EXCESS AIR
Quantity of air in excess of the amount required in the perfect
theoretical fuel/air mix (stoichiometric mix) that the furnace burns.
When tuning a furnace the object is to run the burner at the mini-
mum percentage of excess air that will provide clean (virtually
smokeless and CO free) flue gases.
FLUE
A passageway for conveying the combustion products to the outside
air.
FLUE GASSES
Gaseous products of combustion.
