A. You can use our “Hidden-Vent” calculator which uses one square foot of ventilation per 150 of crawl space area under your home. However, local zoning and code requirements vary by
location. Moreover, checking your local codes will ensure compliance with your specific ventilation requirements.
Note: Purchaser is solely responsible with compliance with all laws regarding installation or use of any items on this web site, including, but not limited to those regarding ventilation.