Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 12 - CONSTRUCTION CODES SUPPLEMENT OF 2017Subtitle 12-I - ENERGY CONSERVATION CODE SUPPLEMENT OF 2017- COMMERCIAL PROVISIONS (12-I[CE] DCMR)
Chapter 12-I4[RE] - RESIDENTIAL ENERGY EFFICIENCY
Section 12-I406 - ENERGY RATING INDEX COMPLIANCE ALTERNATIVE

D.C. Mun. Regs. tit. 12, 12-I406

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Current through Register Vol. 71, No. 49, December 6, 2024
Section 12-I406 - ENERGY RATING INDEX COMPLIANCE ALTERNATIVE

Strike Section R406.2 (including Table R406.2) of the International Energy Conservation Code in their entirety and insert new Section R406.2 and Table R406.2 in the Energy Conservation Code-Residential Provisions in their place to read as follows.

R406.2Mandatory requirements.

Compliance with this section requires that the provisions identified in Sections R401 through R404 labeled as "mandatory" be met. The building thermal envelope shall be greater than or equal to Table R406.2.

TABLE R406.2 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa

FENESTRATION U-FACTORb

0.35 U-Factor

SKYLIGHTbU-FACTOR

0.60 U-Factor

GLAZED FENESTRATION SHGCb

No Requirement

CEILING

R-38

WOOD FRAME WALL

R-13

MASS WALL

R-5 exterior continuous or R-10 interior continuous

FRAME FLOOR

R-19

MASS FLOOR

R-15

BASEMENT WALL

R-10 continuous or R-13 in cavity

SLAB c R-VALUE & DEPTH

R-10 for the first 2 feet

CONDITIONED CRAWLSPACE WALL

R-10 continuous or R-13 in cavity

For SI: 1 foot = 304.8 mm.

a.R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is less than the label or design thickness of the insulation, the installed R-value of the insulation shall not be less than the R-value specified in the table.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
c. R-5 shall be added to the required slab edge R-values for heated slabs.

Strike Section R406.4 (including Table R406.4) of the International Energy Conservation Code in their entirety and insert new Section R406.4 and Table 406.4 in the Energy Conservation Code-Residential Provisions in their place to read as follows.

R406.4ERI-based compliance.

Compliance based on an ERI analysis requires that the rated design be shown to have an ERI less than or equal to 54 when compared to the ERI reference design .

R406.4.1

Renewable energy. The use of renewable energy is not allowed to meet the minimum requirement of 54 as listed in R406.4.

D.C. Mun. Regs. tit. 12, 12-I406

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