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  1. Achiro

    Natural ventilation (outlet) from Marine Machinery Room

    Ok, suppose I won't get answers easily. Nevermind. Thank you anyway.
  2. Achiro

    Natural ventilation (outlet) from Marine Machinery Room

    Thank you both of you. Please I will appreciate if anyone can help me calculate room pressure. I have room volume input, inside temperature, outside temperature (10C degree difference). How do I calculate the pressure? The engines get the air from the engine room, do not have separate intake.
  3. Achiro

    Natural ventilation (outlet) from Marine Machinery Room

    Hi Chicopee, Appreciate your reply. But I have a problem, the actual duct is already smaller than inlet duct (drawn on sketch I have uploaded). I need to prove that the actual duct can exhaust air without the exhaust fan (I would like to avoid exhaust fan because several reasons). How can I...
  4. Achiro

    Natural ventilation (outlet) from Marine Machinery Room

    This is airflow for combustion, needed air supply for engines; in air INLET calculation for engine room, not exhaust. The calculation shown in OP is air IN, just to show where do I get so far. I get stuck on calculating the air OUT, to be precise, optimal duct dimension without fan usage.
  5. Achiro

    Natural ventilation (outlet) from Marine Machinery Room

    Dear all, would appreciate if anyone is willing to help me with following: I manage to figured out the ventilation calculation for duct/grilles sizing for E.R. inlet (but need to double check, air-in is not the issue). Calculated following: 1. Airflow for combustion from engines (Value X -...

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