I have an old attic where the soffits aren't ventilated, and can't be because the soffits are a separate dead air space, not continuous with the attic. It currently has two turbine vents (one of which does largely nothing since it's lower than the other) as well as gable vents, which are original to the house.
What would be the best way to add intakes to balance the exhaust capacity I currently have. Not including the two gable vents, I should have about 2 sq.ft. of exhaust ventilation for the 300 sq.ft. attic, but without any intakes, they don't really do much.