1. U.S. Code of Federal Regulations, Part 440-weatherization assistance for low income persons, 49-CFR 3629, Washington, DC, 1984.
2. Energy Conservation for Housing – A Workbook;Abt Associates,1998
3. BPI 101 Home Energy Auditing Standard;Building Performance Institute (BPI),2010
4. Department of Energy – Seattle Regional Offices and Energy OutWest, Weatherization field manual. Best practices for weatherization assistance program, Energy OutWest and Saturn Resource Management, 2005.
5. RESNET, Chapter 7 RESNET Standards, RESNET National Standard for Home Energy Audits, Residential Energy Services Network, http://www.resnet.us/standards/National_Energy_Audit_Standard.pdf, 2012.