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Related HowStuffWorks ArticlesSources
  • Build it Green. (Dec. 9, 2009). http://www.builditgreen.org
  • The Cellulose Installation Manufacturing Association. (Dec. 9, 2009).http://www.cellulose.org/pdf/cellulose_bulletins/tech_bulletin2.pdf
  • Energy Star. (Dec. 9, 2009). http://energystar.custhelp.com/cgibin/energystar.cfg/php/enduser/std_adp.php?p_faqid=2600
  • Extruded Polystyrene Foam Association. (Dec. 9, 2009).http://www.xpsa.com/index.html
  • Greener Building. (Dec. 9, 2009).http://www.greenerbuilding.org
  • North American Insulation Manufacturers Association. (Dec. 9, 2009).www.naima.org
  • Spray Polyurethane Foam Alliance. (Dec. 9, 2009).http://www.sprayfoam.org
  • U. S. Department of Energy. (Dec. 9, 2009).http://www.energysavers.gov