Foundation/Crawl Space Vent Clearance

I’m looking for a code or standard for foundation/crawl space vent to grade clearance. Appreciate any help.

I do not think crawl spaces should be vented .

https://buildingscience.com/documents/information-sheets/crawlspace-insulation

James please go to top left (Control Panel ) and put in your information so we have an idea where you live thanks Roy

Don’t think there is one. Common sense applies though. If too close, add a vent/window well.

I don’t think the general IRC has one. My state(north carolina 2012) amended IRC code has one though. Not sure how much this will help you.

SECTION R408
WALL-VENTED CRAWL SPACES

R408.1.2 Foundation vent location.
…Vent dams shall be provided
when the bottom of the foundation vent opening is
less than 4 inches above the finished exterior grade.