1. (a) Single family residential dwellings, as defined in §388.002 of the Health and Safety Code, that are newly constructed or reconstructed shall comply with §388 of the Health and Safety Code (Texas Building Energy Performance Standards).
2. (b) Effective January 1, 2012, the Texas State Energy Conservation Office adopted the 2009 International Residential Code (Chapter 11) as the state-mandated energy code for all residential construction, one- and two-family residences of three stories or less above grade.
3. (c) For construction activities that start on or after September 1, 2016, Chapter 11 of the 2015 International Residential Code is adopted as the energy code in Texas for single family residential construction.
4. (d) Manufactured Housing Units that are installed as replacement for sub-standard housing shall be ENERGY STAR certified.

Source Note:The provisions of this §21.5 adopted to be effective January 9, 2014, 39 TexReg 76; amended to be effective November 11, 2015, 40 TexReg 7812.