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Mini quiz · Lesson 03
Combustion Analysis & Gas Furnace Tuning
Question 01 / 06
Safe CO reading in the flue of a tuned natural gas furnace is:
Question 02 / 06
Target O2 range in flue gas for natural gas combustion:
Question 03 / 06
Stack temperature on a 90%+ condensing furnace should be:
Question 04 / 06
Standard natural gas manifold pressure is:
Question 05 / 06
Cracked heat exchanger findings require:
Question 06 / 06
CASE: Service call for 'furnace not heating well.' Combustion test reads 1,200 ppm CO, O2 of 1.5%, stack temp 600°F on an 80% furnace. Visual: burners orange-tipped, flame yellow. What's the immediate action and the root cause?
0 / 6 answered