Using Your Combustion Analyzer To Detect Exhaust Gas Recirculation

Now that we're into heating season, here's another great use for your combustion analyzer: detecting exhaust gas recirculation.

This is a commonly overlooked issue, but the testing process is simple:
1. Drill a hole in your intake pipe and insert the probe into your combustion analyzer,
2. Close the door on the furnace and turn it on,
3. If oxygen levels are below 20.9%, you likely have recirculation of exhaust gas.

If you don't yet have a Sauermann Si-CA 130 analyzer, TruTech Tools, LTD has a promo on all Sauermann combustion analyzers until October 31st: https://trutechtools.com/sauermann-pr...

00:00 Introduction
00:16 Probe Placement And Closing Furnace Door
00:41 Identifying Flue Gas Recirculation
01:05 Importance of Proper Combustion Analysis
01:43 Inspecting the Furnace Exhaust Vent
02:22 Preventing CO Pathways