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

The equal-friction duct-sizing method is based on:

Keeping the same friction rate (in. wc per 100 ft) in each section and reducing velocity as the cfm drops Using the same duct size from the air handler to every outlet Ignoring fittings and using only measured length Sizing every branch for 2,500 fpm

Correct Answer:

Keeping the same friction rate (in. wc per 100 ft) in each section and reducing velocity as the cfm drops

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