Flue Gas Analysis
Flue gas analysis
Typical values per fuel and a calculator from your analyser readings (Siegert formula).
| Fuel | O₂ % | CO₂ % | CO₂max % | CO | Flue temp | λ | qA max |
|---|---|---|---|---|---|---|---|
| Natural gas Check leaks and chimney draught. | 2–6 | 8,5–10,5 | 11,7 | < 100 ppm | 120–180 °C (συμπύκνωσης 40–80 °C) | 1,10–1,40 | ≤ 9 % |
| LPG Heavier than air — mind ventilation. | 2–6 | 10–12 | 13,7 | < 100 ppm | 120–180 °C | 1,10–1,40 | ≤ 9 % |
| Heating oil / Mazout Smoke number (Bacharach) ≤ 1, no oil traces. | 3–5 | 12–13,5 | 15,4 | < 80 ppm | 160–220 °C | 1,15–1,30 | ≤ 10 % |
| Pellets / wood CO limit ~500 mg/m³ at 13% O₂ (Ecodesign, automatic feed). | 6–10 | 10–14 | 20,3 | ≤ 500 mg/m³ | 120–200 °C | 1,4–2,0 | ≤ 15 % |
- Excess air λ
- 1,24
- CO₂ (%)
- 9,5
- Flue gas loss qA
- 6,2 %
- Combustion efficiency
- 93,8 %
- Undiluted CO
- 49 ppm
- O₂ (%)
- 4
Green = within typical range, red = outside. Indicative values — always follow the manufacturer and current legislation (in Greece KYA 189533/2011).