What percentage of CO is acceptable in a sample of the flue gas?
What percentage of CO is acceptable in a sample of the flue gas?
The current ANSI Z21. 47 standard (1998) requires that an air-free flue gas sample of CO not exceed a maximum of 400 ppm (0.04 percent) when a furnace vent is either partially or completely blocked.
What should flue gas Analyser readings be?
Flue gas analysers usually display a CO/CO2 ratio. This shows the ratio of carbon monoxide and carbon dioxide in the exit flue (chimney) of the appliance. Generally when this level is below 0.004 the boiler is considered to be running efficiently. For oil or coal fired appliances the CO should not be above 200ppm.
What is the maximum permissible CO reading?
In the USA the Environmental Protection Agency (EPA) have set a maximum level of CO in the flue at 400 PPM. In the home a concentration of no more than 9 PPM is recommended.
What is the maximum permissible CO CO2 ratio?
0.0040
When a manufacturer has not specified the maximum amount of CO in the flue of a condensing boiler, the HHIC states that the maximum amount of CO must not be more than 350 PPM (Parts Per Million) and the Combustion Ratio is less than or equal to 0.0040.
What is normal CO ppm?
Average levels in homes without gas stoves vary from 0.5 to 5 parts per million (ppm). Levels near properly adjusted gas stoves are often 5 to 15 ppm and those near poorly adjusted stoves may be 30 ppm or higher.
What is a bad reading for carbon monoxide?
70 PPM is the lowest required alarm. alarm, it must resist alarming for at least one hour when above this level but must alarm before 4 hours. (Over 70 PPM and under 150 PPM). This is unhealthy air.
What is acceptable level of CO?
0-9 ppm CO: no health risk; normal CO levels in air. 10-29 ppm CO: problems over long-term exposure; chronic problems such as headaches, nausea. 30-35 ppm CO: flu-like symptoms begin to develop, especially among the young and the elderly.
What should my combustion analysis be?
A typical reading would be 2% to 6% (see Figure 2). I like adjusting the air for the middle of the acceptable range in case the blower wheel gets dirty and delivers less air for combustion.
What is the ideal CO2 content of flue gas?
approximately 10%
Carbon dioxide – CO2 – is a combustion product and the content of CO2 in a flue gas is an important indication of the combustion efficiency. Optimal content of carbon dioxide CO2 after combustion is approximately 10% for natural gas and approximately 13% for lighter oils.
What should the CO CO2 ratio be?
The calculations suggest that, to avoid occasional exceedence of the room CO limit, the CO/CO2 ratio should in many cases be lower than 0.02, and in some cases lower than 0.01.
What is the minimum permissible O2 reading?
Your “Normal” SpO2 Range According to the Mayo Clinic, normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low, and indicate the need for supplemental oxygen.
What kind of instrument is used for flue gas analysis?
NOTE: The Orsat was the instrument of choice for performing flue gas analysis before the advent of electronic instruments. Although antiquated by today’s electronic instruments, you may still hear this name used ‘generically’ (by older people) to refer to a flue gas analyzer or actually find one in use in the field.
What should the reading be on a gas analyser?
That means that if it is between the two you should investigate. It is also accepted that after debris has been stirred up through maintenance temporarily the reading may be 0.008 and this is acceptable. This practise corresponds to about 500ppm CO inside the flue gases (not by adjusted free air test).
What should the flue gas reading be after maintenance?
It is also accepted that after debris has been stirred up through maintenance temporarily the reading may be 0.008 and this is acceptable. This practise corresponds to about 500ppm CO inside the flue gases (not by adjusted free air test). So what we are saying is that CO of 500ppm inside the flue is worth investigating.
How is flue gas used in an FGA?
An FGA samples the flue gas of a working appliance and measures the critical gases produced in the combustion process to determine if it is operating efficiently, but also if it is operating safely. Some of the products of combustion are hazardous to humans, namely carbon monoxide (CO) and carbon dioxide (CO 2