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Introduction

SECTION 2. BACKGROUND

Internal Revenue Bulletin 2006-11 · 2026-10-03 edition · updated 2026-10-04 · United States

.01 Section 1333 of the Energy Policy Act of 2005, Pub. L. No. 109–58, 119 Stat. 594 (2005), added § 25C to the Internal Revenue Code. Section 25C provides a credit against tax for the taxable year in an amount equal to the sum of—

(1) Ten percent of the amount paid or incurred by the taxpayer for qualified energy efficiency improvements (that is, property described in section 4.01 of this notice) installed during the taxable year; and

(2) The amount of expenditures for residential energy property (that is, property described in section 5.01 of this notice) paid or incurred by the taxpayer during the taxable year.

2006–11 I.R.B. 622 March 13, 2006

(a) The name and address of the manufacturer;

(b) Identification of the component as an insulation material or system, an exterior window or skylight, an exterior door, or a metal roof;

(c) The make, model number, and any other appropriate identifiers of the component;

(d) A statement that the component is an Eligible Building Envelope Component that qualifies for the credit allowed under § 25C;

(e) In the case of an exterior window, skylight, or door (other than a storm window or storm door), the climate zone or zones for which the applicable prescriptive criteria are satisfied;

(f) In the case of a storm window— (i) The classes of exterior window ( e.g., single pane; double pane, clear glass; double pane, Low-E coating) over which the storm window may be installed and that, in combination with the storm window, satisfy the applicable prescriptive criteria for one or more climate zones; and

(ii) For each such class of exterior window, the climate zone or zones for which the applicable prescriptive criteria are satisfied; and

(g) A declaration, signed by a person currently authorized to bind the manufacturer in such matters, in the following form:

“Under penalties of perjury, I declare that I have examined this certification statement, and to the best of my knowledge and belief, the facts are true, correct, and complete.”

(5) Manufacturer’s Records. A manufacturer that certifies to a taxpayer that a component is an Eligible Building Envelope Component must retain in its records documentation establishing that the component satisfies the applicable conditions of section 4.01 of this notice including, in the case of an exterior window, its National Fenestration Rating Council (NFRC) rating. The manufacturer must, upon request, make such documentation available for inspection by the Service.

(6) Effect of Erroneous Certification or Failure to Satisfy Documentation Requirements. The Service may, upon examination (and after any appropriate consultation with the Department of Energy (DOE) or Environmental Protection Agency (EPA)), determine that a com

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