What type of HVAC system is characterized by a having a split supply air stream, with one for cold air and the other for hot air?
Official USCG Answer & Rule Citation
Correct Answer: Option B — A dual duct system
Dual duct HVAC systems utilize two separate supply air streams, one heated and one chilled, running in parallel. Mixing boxes blend these streams at terminal points to provide precise zone temperature control, complying with marine habitability and thermal comfort standards under 46 CFR.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.