CHAPTER 1. DESIGN QUALIFICATION AND CERTIFICATION

All vents for attic/roofs and crawlspaces shall be clear of insulation. Attic and roof vents shall not be used as exhaust vents for mechanical ventilation systems. ... a minimum of one supply register and a return grill shall be used in the crawl space. A minimum flow of 50 cfm shall be provided by either the supply register… ................
................

In order to avoid copyright disputes, this page is only a partial summary.