Fiber Glass

The recovered content of fiber glass ranges from zero to a maximum of about 30%. In many cases factory waste accounts for much of the recovered content Fiber glass is produced in furnaces that burn natural gas and release CO2 and other greenhouse gases into the air. Estimates of the embodied energy of fiber glass range from about 8,500 BTU/lb to more than 12,000 BTU/lb which is 11 times or more cellulose.