Laars FT (wall , floor ) Natural Gas AND LP Combustion Analysis Result #'s .

Laars FT (wall , floor ) Natural Gas AND LP Combustion Analysis Result #'s .

Laars MFTCW, MFTHW, FTCF AND FTHF ALL SIZES 

Combustion Analysis Result #'s streamlined for best results:

All Adjustments are to be performed and tested in LOW FIRE ONLY 

NATURAL GAS LOW FIRE 
CO2 Carbon Dioxide= 8.5%-8.8% 
O2 Oxygen=5.5%-5.8%
Excess Air=35%-38%

LP (Propane) LOW FIRE 
CO2 Carbon Dioxide=9.0%-9.5%
O2 Oxygen=7.0%-7.5%
Excess Air=50%-55%

* These are approximate "Best Condition" results depending on differing factors of boiler placement, exhaust and intake piping , gas pressures, gas pipe sizing, combustion analyzer accuracy , analyzer calibration , etc. 

See attachments for examples of combustion analysis printouts for both fuels (natural and LP ) !