This iPAD Version app is designed for Chimney and Venting Professionals. It contains tools for everyday use such as calculators for common items used in the chimney and venting field, chimney diagrams, manufacturer phone numbers and links to sites. References such as BTU Charts with reduction calculators, CO toxicity references, Levels of chimney inspections, Stainless Steel Alloy Guides, Common IRC and NFPA references, and Much More.