After installing a gas-fired furnace, which test result should be documented and left on site?

After installing a gas-fired furnace, which test result should be documented and left on site?

• A. Combustion test
• B. Leak test
• C. Electrical test
• D. Pressure test

Answer: (A)

After installing a gas-fired furnace, you must document and leave on site the combustion test results. This test uses a flue gas analyzer to check the exhaust gases and venting, ensuring the fuel-to-air mix is correct, carbon monoxide levels are within safe limits, and the venting is adequate. Keeping this record on site provides proof the furnace was properly commissioned and safe to operate, which is essential for homeowner reference and code compliance. While leak testing, electrical checks, and pressure tests are also performed during installation, they do not directly show safe combustion performance in the way a combustion test does, which is why this particular result is the one to document and leave on site.

After installing a gas-fired furnace, you must document and leave on site the combustion test results. This test uses a flue gas analyzer to check the exhaust gases and venting, ensuring the fuel-to-air mix is correct, carbon monoxide levels are within safe limits, and the venting is adequate. Keeping this record on site provides proof the furnace was properly commissioned and safe to operate, which is essential for homeowner reference and code compliance. While leak testing, electrical checks, and pressure tests are also performed during installation, they do not directly show safe combustion performance in the way a combustion test does, which is why this particular result is the one to document and leave on site.