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

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A building heat loss is 48,000 Btu/h at an outdoor design of 20°F with 70°F indoors (50°F difference). The heat pump's heating capacity at 20°F is 36,000 Btu/h. Which statement is correct?

The balance point is always 32°F regardless of load and capacity The shortfall is 48,000 Btu/h because the heat pump does not operate below 32°F The heat pump is above the balance point and needs no supplemental heat at 20°F 20°F is below the balance point, so supplemental heat is required to meet the 12,000 Btu/h shortfall

Correct Answer:

20°F is below the balance point, so supplemental heat is required to meet the 12,000 Btu/h shortfall

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