I'm not sure what size the gable vents should be from a technical standpoint, but I would assume the square footage of gables should be equal or greater than the soffits.
Just some thoughts:
You could get an aesthetically pleasing triangular gable vent for the front large enough to 'cover' the hole left by the rectangular gable vent now on the front, and move the rectangular one to the back.
The foyer partition.....I understand your concept of separation (that's now shot-bummer)....was thinking the foyer could be 'ceilinged' off, the upper portion of partition replaced with chicken wire and area above foyer ceiling used for storage...dusty storage, but storage none the less. The dust will go high, carried by airflow...my 12 foot high shed windows have quite a bit of dust on them when I close them up in winter I have to clean(shopvac) them for better light infiltration. That's a lot of extra 'rework', I know, but just a thought.
Just some thoughts:
You could get an aesthetically pleasing triangular gable vent for the front large enough to 'cover' the hole left by the rectangular gable vent now on the front, and move the rectangular one to the back.
The foyer partition.....I understand your concept of separation (that's now shot-bummer)....was thinking the foyer could be 'ceilinged' off, the upper portion of partition replaced with chicken wire and area above foyer ceiling used for storage...dusty storage, but storage none the less. The dust will go high, carried by airflow...my 12 foot high shed windows have quite a bit of dust on them when I close them up in winter I have to clean(shopvac) them for better light infiltration. That's a lot of extra 'rework', I know, but just a thought.