AK HVAC Practice Questions - Alaska Mechanical Administrator HVAC License Exam

In Alaska, what is the primary reason for using sealed combustion (direct vent) heating appliances?

They are less expensive than atmospheric vented units They draw combustion air from outdoors and vent exhaust outdoors, preventing indoor air quality issues in tightly sealed buildings They produce more heat than open combustion units They do not require a gas supply connection

Correct Answer:

They draw combustion air from outdoors and vent exhaust outdoors, preventing indoor air quality issues in tightly sealed buildings

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