R-31 | Article about R-31 by The Free Dictionary
chlorofluoromethane (redirected from R-31)
A compound consisting of chlorine, fluorine, and carbon, has the potential to destroy ozone in the stratosphere. Also known as fluorochlorocarbon (FCC). Abbreviated CFC.
References in periodicals archive
2 kW Cost of PV Array $44,800 Cost Savings $22,596 Upgrades improved wall from R-21 to R-31
and roof from R-28 to R-51.
The minimum R-factor in most climate zones should be R-19 walls and R-31