My Catalina 28 MK2 has an engine compartment blower (I presume this is standard issue) with both an inlet and exhaust hose that vents out of the stern. I need to replace the hose. The current hose looks like cheap vinyl 3" dryer vent hose. I notice that Amazon sells plastic "Black Marine Blower Hose". Is there something special about this hose rather than regular vent hose that should steer me to "marine" hose? Also --- wouldn't it be more effective (in terms of air circulation, cabin heat and odour extraction) to pull the air from the engine compartment itself (its not sealed) rather than through an intake hose. (note: I do not have AC on the boat). Thoughts?