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HVAC
NATE CHP-5 Certified HVAC Professional
Code Compliance
Knowledge Check
Code Compliance
Knowledge Check
Knowledge Check
1 / 15
A furnace flue gas analysis reads 120 ppm CO in the undiluted flue gas. What should the technician do?
A
The reading is within acceptable limits since residential furnaces are allowed up to 200 ppm
B
Note the reading and schedule a follow-up for the next maintenance cycle
C
Shut down the furnace immediately, inform the homeowner, and document the reading
D
Increase the gas input to improve combustion efficiency
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