{"code":"BPC","codeName":"Business and Professions Code","section":"19020","citation":"Bus. & Prof. Code, § 19020","status":"in-force","lawOn":"2026-09-28","headings":[{"name":"DIVISION 8. SPECIAL BUSINESS REGULATIONS [18400. - 22949.92.2.]","url":"https://blackletter.si/business-and-professions-code/division-8"},{"name":"CHAPTER 3. Home Furnishings [19000. - 19221.]","url":"https://blackletter.si/business-and-professions-code/division-8/chapter-3"},{"name":"ARTICLE 1. General Provisions [19000. - 19022.]","url":"https://blackletter.si/business-and-professions-code/division-8/chapter-3/article-1"}],"history":"Added by Stats. 1984, Ch. 1456, Sec. 3.","effective":null,"html":"<p>“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<table><tbody><tr><td rowspan=\"2\"><p>R-value =</p></td><td><p>1</p></td></tr><tr><td><p>conductance of the material</p></td></tr></tbody></table><br />where the conductance of the material is: Btu (hour × square foot × Fahrenheit degree average temperature difference between two surfaces).</p>","text":"“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).","otherVersions":[],"url":"https://blackletter.si/business-and-professions-code/general-provisions-19020","source":"California Legislative Information bulk export (pubinfo)"}