1. (a) All rehabilitation activities funded by a Contract with an effective date on or after September 1, 2016, or a Reservation of Department funds submitted on or after September 1, 2016, shall comply with Chapter 11 of the 2015 International Residential Code as the energy code in Texas for single family residential construction.

2. (b) If the proposed scope of work or the awarded construction contract for the Rehabilitation of an existing single family residential unit includes an item described in paragraphs (1) - (9) of this section, the following requirements shall apply:

   1. (1) Replacement or installation of central heating and cooling equipment shall be sized as specified in Chapter 14, Section M1401.3 of the 2009 International Residential Code;
   2. (2) If central heating and cooling equipment is replaced or installed, ductwork located in unconditioned spaces shall be sealed in accordance with Chapter 14, Section M1601.4.1 of the 2009 International Residential Code. Ductwork located in unconditioned spaces shall be insulated to R-8;
   3. (3) If central heating and cooling equipment is replaced or installed, attic insulation shall be increased to R-30 (R-38 in Climate Zone 4 as defined by Chapter 11, Figure N1101.2 of the 2009 International Residential Code), including insulation covering the top plates of exterior walls. Baffles shall be installed in framing bays of existing soffit vents, as specified in Chapter 11, Sections N1102.2.1 - N1102.2.3 of the 2009 International Residential Code;
   4. (4) If ductless heating and cooling systems (also known as mini-split, multi-split or variable refrigerant flow (VRF) heat pump systems) are replaced or installed, they shall be ENERGY STAR certified;
   5. (5) If exhaust fans are replaced or installed in bathrooms or kitchens, they shall be ENERGY STAR certified and installed in accordance with Chapter 15 of the 2009 International Residential Code;
   6. (6) If windows are installed, they shall be ENERGY STAR certified windows, meeting the U-factor and Solar Heat Gain Coefficient for the climate zone of the dwelling as identified in Chapter 11, Table N1101.2 of the 2009 International Residential Code;
   7. (7) Electrical fixtures, equipment and appliances that are replaced or installed, where applicable, shall be ENERGY STAR certified products;
   8. (8) Plumbing fixtures that are replaced or installed, where applicable, shall be WaterSense labeled products;
   9. (9) Domestic water heaters, storage and tankless, when replaced or installed, shall meet the Federal Energy Conservation Standards required by 10 CFR 430.32, and as they may be revised from time to time.

Source Note:The provisions of this §21.6 adopted to be effective January 9, 2014, 39 TexReg 76; amended to be effective November 11, 2015, 40 TexReg 7812.