Hello. twin diesel engine room with two large ventilation fans. No space for any more. What is best, both bringing air in, one in and one out, or both out? Any suggestions, please?
Some initial information required in order to determine the purpose of the fans:
What size engines?
What size/volume engine room?
What other heat emitting equipment is in the engine room?
When do you perceive that you would need to run the fans?
Assume that the air inlet louvres to the engine room are adequately sized?
As an initial response, I would definitely rule out the “both out” option as this would create a slightly negative pressure in the engine room and adversely affect the engine induction.