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COMBUSTION SAFETY ALERT: a closed crawlspace design may not be compatible with atmospheric or “natural” draft
appliances such as furnaces or water heaters. Consult with a professional before implementing a closed crawlspace.
Preventing bulk water intrusion into the crawlspace is critical to proper crawlspace performance. This requires proper handling
of bulk water, which may involve roof water run-off, surface water drainage and site grading issues. © 2007 Therma-Stor LLC