D.C. Mun. Regs. tit. 12, 12-I5.1

Current through Register Vol. 71, No. 49, December 6, 2024

Section 12-I5.1 - GENERAL

Strike Section 5.1.3 ofASHRAE 90.1 in its entirety and insert a new Section 5.1.3 in its place in the Energy Conservation Code-Commercial Provisions to read as follows:

5.1.3

Envelope Alterations. Alterations to the building envelope shall comply with the requirements of Section 5 for insulation, air leakage, and fenestration applicable to those specific portions of the building that are being altered.

Exceptions: The following alterations need not comply with these requirements, provided such alterations will not increase the energy usage of the building:

1. Installation of storm windows or glazing panels over existing glazing, provided the storm window or glazing panel contains a low-emissivity coating. However, a low-emissivity coating is not required where the existing glazing already has a low-emissivity coating. Installation is permitted to be either on the inside or outside of the existing glazing.

2. Replacement of glazing in existing sash and frame due to individual broken panes and considered repair only, provided the U-factor and SHGC will be equal to or lower than before the glass replacement.

3. Alterations to roof/ceiling, wall, or floor cavities that are insulated to full depth with insulation having a minimum nominal value of R-3.0/in.

4. Alterations to walls and floors, where the existing structure is without framing cavities and no new framing cavities are created.

5.Roof recovering.

6. Replacement of existing doors that separate a conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided that an existing vestibule that separates a conditioned space from the exterior shall not be removed.

Strike Section 5.1.4.2 ofASHRAE 90.1 in its entirety without substitution.

D.C. Mun. Regs. tit. 12, 12-I5.1

Final Rulemaking published at 67 DCR 5679 (5/29/2020)