2.4 References for Extracts in Mandatory Sections.
NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning
Systems, 2012 2015 edition.
NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel–Burning
Appliances, 2010 2013 edition.
NFPA 5000®, Building Construction and Safety Code®, 2012 2015 edition.