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

Which statement correctly contrasts Category I and Category IV gas-appliance venting?

Both categories may always share a Type B common vent Category IV appliances never produce condensate Category I is positive-pressure condensing; Category IV is negative-pressure noncondensing Category I is nonpositive (typically negative) and noncondensing; Category IV is positive-pressure and condensing

Correct Answer:

Category I is nonpositive (typically negative) and noncondensing; Category IV is positive-pressure and condensing

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