Eave venting gable vent
 

I have been posting often trying to determine a solution. If I am going to use spray foam down to a kneewall and then treat the other side of the kneewall as a separate space, how do I know if the gable vents on each side will offer enough ventilation, or if I need power vents?

You should keep your posts on the same project under the same thread. Right now, no one knows what you are talking about. Post the link to your original thread where you discuss you rproject.