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U.S. Department of Energy
Washington, DC. USA

Operating your boiler with an optimum amount of excess air will minimize heat loss up the stack and improve combustion efficiency. Combustion efficiency is a measure of how effectively the heat content of a fuel is transferred into usable heat. The stack temperature and flue gas Oxygen (or Carbon Dioxide) concentrations are primary indicators of combustion efficiency.

Natural Resources and Office of Energy Efficiency
Typically, reducing O2 in the flue gas by 1 percent- for example, from 5 percent to 4 percent- increases boiler efficiency by about 2.5 percent.

Controlling excess air is the most important tool for managing the energy efficiency and atmospheric emissions of a boiler system.

As graph shows, the effect of air temperature on excess air in the flue gas can be dramatic.


1 Fine regulation of Excess Air.
2 Improves heat transfer rate.
3 Substanital Fuel Savings.
4 Tighter smoke Emission Control.
5 Reduces the risk of Explosion.
6 Improves Combustion Efficiency.
7 No need to add expensive Fuel Additives.
8 Ideal for all types of Fuels like Lignite, Oil, Gas, Agro waste etc.
9 Continuously Matching Fuel & Air rates to demand
10 Reduces harmful Emissions, less Pollution, reduces Global Warming.
11 Reduces costly Maintenance bills.

Above all you will earn Carbon Credit which is substantial.