California Business and Professions Code Section 19020

CA Bus & Prof Code § 19020 (2017)  

“R-value” means a measure of thermal resistance of material or composite materials. “R-value” is equal to the reciprocal of the conductance of a given material, or

R-value =	1
conductance of the material

where the conductance of the material is: Btu (hour × square foot × Fahrenheit degree average temperature difference between two surfaces).

(Added by Stats. 1984, Ch. 1456, Sec. 3.)

Last modified: October 25, 2018