Answer a few questions about your crawl space and climate to get a clear recommendation.
Your details
Mapped to IECC climate zone 2
Recommendation
seal and condition
In humid summer climates, open vents pull in moisture that can lead to mold and wood rot. Sealing and conditioning the space is the safest path.
This tool provides general guidance based on climate assumptions. Always consult a local professional for your specific crawl space.
See our methodology for source details.