Get With Combustion Analysis Report

The ideal CO content in a flue gas should be below 100 ppm air-free, although the permissible limit in the stack is 400 ppm air-free. If the CO rises and becomes unstable between 1 ppm and 400 ppm during the combustion process, the heater should be turned off or sent for testing and repairs.

The reading on the combustion analyzer will display the oxygen percentage as a percent of the total flue gas volume. For instance, a reading of 4% O2 means oxygen comprises 4% of the volume of flue gases. A typical reading would be 2% to 6% (see Figure 2).

Combustion analyzers are designed to rate the concentrations of different gases in the air, including oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO), as well as stack temperature and draft—and these combustion analyzer readings provide you with the real-time data and information you need to find gas leaks, ...

Actually, you usually set the combustion level for 11-13% CO2 or 3-6% O2 using the guidelines outlined above. This area has been highlighted in Figure 1. It is very important to use combustion test instruments to determine the most practical level of burner operation.

Mechanically mixing air and gas allows for lower oxygen levels and typically better efficiency. Carbon monoxide: Code often allows 400 parts per million (ppm). But to be safe you would not want to see any more than 150 ppm. A reading above 150 ppm would be a red flag to double-check the combustion.

Combustion analyzers, also called CHN analyzers, measure the concentration of elements in a sample. The term CHN stands for carbon, hydrogen, and nitrogen which are a few of the elements commonly measured on these machines.

It's normal for most modern furnaces to have a CO level of less than 50 PPM in the flue, and older natural draft units can safely skate by with levels as high as 200 PPM. However, a furnace with CO levels higher than 200 PPM in the flue should never be in operation without being adjusted or repaired first.

Combustion analysis is a method used in both organic chemistry and analytical chemistry to determine the elemental composition (more precisely empirical formula) of a pure organic compound by combusting the sample under conditions where the resulting combustion products can be quantitatively analyzed.

Combustion analysis is a careful test of the heat exchanger (the fueling sources mentioned above) in a furnace or boiler. The process of heating air involves the inevitable emission of harmful gasses, and combustion analysis is a way to check if the fuel-to-air ratio in the heat exchanger is safe and appropriate.