SC Air Conditioning Practice Questions - South Carolina Air Conditioning Contractor Examination Exam

A condensing (typically 90 percent-plus AFUE) warm-air furnace is a Category IV appliance and is commonly vented with:

A single-wall connector run through an unconditioned attic without insulation The building plumbing stack Type B double-wall gas vent serving a negative-pressure, noncondensing flue A listed plastic (PVC, CPVC, or polypropylene) or special gas vent listed for positive-pressure condensing flue gas

Correct Answer:

A listed plastic (PVC, CPVC, or polypropylene) or special gas vent listed for positive-pressure condensing flue gas

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