### Question
How is the term advanced insulation defined?


### Answer
The term **advanced insulation** is defined in *42 U.S.C. § 17242* as the following:

> insulation that has an R value of not less than R35 per inch

#### Citation:
  - *42 U.S.C. § 17242*
  - Heading: **CHAPTER 152-ENERGY INDEPENDENCE AND SECURITY > SUBCHAPTER V-ACCELERATED RESEARCH AND DEVELOPMENT > Part E-Miscellaneous Provisions**

