According to InterNACHI standards, when inspecting a home with multiple HVAC systems, what is required?
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A
Only the primary HVAC system serving the main living area needs to be inspected
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B
All permanently installed heating and cooling systems must be inspected
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C
Each system must be tested for at least 30 minutes of continuous operation
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D
HVAC systems installed within the last 5 years are exempt from inspection