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# Residential Code Change Proposals for the 2015 IECC DOE Concepts for the IECC The U.S. Department of Energy (DOE) supports the International Energy Conservation Code (IECC) by participating in the code development processes administered by the International Code Council (ICC). As a participant in this process, DOE considers and evaluates c oncepts to be submitted as proposed changes to the IECC (“code”). DOE intends to participate in the IECC development process by: Developing code change proposals for submission to the ICC 1. Gathering public input on DOE code change proposals from interested parties prior to submitting to the ICC 2. Conducting necessary technical analyses to document the validity of DOE code change proposals 3. 

## DOE Proposal Development DOE seeks to advance energy efficiency in the IECC by strengthening the code where cost-effective, and improving the criteria to be more easily understood, applied, implemented and enforced. Prior to submitting code change proposals to the ICC, DOE will publish draft cod e change proposals that it has developed, along with documentation of concepts, for public review and comment. DOE will not provide resp onses to individual comments, but will consider any and all comments timely submitted in developing final code change proposals. DOE draft proposals, along with additional concepts still under consideration, will be further developed based on the feedback received. Final propo sals will be posted for public viewing prior to submitting to the ICC. 

## Submitting Comments on DOE Concepts In the current code cycle, the ICC will be considering proposed revisions to the 2012 IECC which will result in the 2015 IECC. In order to allow adequate time to incorporate feedback prior to the ICC submission deadline of January 3, 2013, interested parties are asked to submit any and all comments on DOE initial concepts and draft code change proposals by October 19, 2012 . Early feedback is appreciated in order to maximize the opportunity for revisions and enhancements. DOE anticipates that it or its contractors may be contacted regarding code concepts, ideas or change proposals through phone, m ail, or email. While DOE code change proposals to the IECC are not regulations, DOE will follow ex parte communication policy for such communications. Guidance on ex parte communications was published on January 21, 2009 (74 FR 4685). Note that such communications will be refle cted in the public docket consistent with the ex parte guidance. 

## DOE Technical Analysis In developing concepts for submission to the ICC, DOE conducts a series of analyses to evaluate energy savings and economic imp acts of potential code change proposals. However, many proposals submitted to the ICC do not require analysis as they represent minor c orrections or alignments between the code itself, or referenced standards, changes to the format of the code, or have no cost impact. DOE is not able to provide technical assistance at the request of outside parties, but reserves the right to conduct analysis in support of propos als DOE is considering for submission to the ICC. While DOE cannot enter into joint code change proposals (outside of proposals submitted jointly withanother federal agency), DOE intends to support efficiency concepts from the perspective of its own analysis. DOE will reference all analysis and supporting documentation as required by the ICC. Analysis performed by DOE or its contracto rs for the purpose of developing code change proposals should be considered on a technical basis, and does not represent an endorsement of any particular individual or organization. DOE will also publish the results of its analysis, along with supporting energy simulati on models, for review and use by outside parties. Any interested party wishing to review or build-upon the DOE analysis can access it via Development

. 

## Timeline Comments on DOE concepts and draft proposals are due October 19, 2012 DOE code change proposals will be posted for public viewing on or about December 1, 2012 The ICC deadline for submission of proposals for the 2015 IECC is January 3, 2013 

## Instructions Comments on DOE concepts and draft code change proposals for the 2015 IECC can be submitted by email to EnergyCodeDevelopment2012BC0030@ee.doe.gov

. All submissions received must include the agency name (U.S. DOE), docket number (EERE-2012-BT-BC-0030), and any/all applicable concept numbers (see concept table below) in the subject line of the message. 

# Residential Concepts for the 2015 IECC To foster review, concepts are organized by type of change: Concepts that increase energy efficiency (RA) Concepts that extend flexibility and usability of the code (RB) Commercial concepts DOE is considering for the 2015 IECC

. The order in which the concepts are presented should not be construed to represent any prioritization of the concepts. Draft an d final proposals, as well as supporting analysis files, will be added as they become available.

### Draft proposals are available to view/download as separate individual files from the table below, or as a complete package: iecc2015_Residential_draft.zip

. 

### Concepts that increase energy efficiency (RA) C ONCEPT 

### # C ONCEPT

### N AME

### /D ESCRIPTION 

### D RAFT 

### P ROPOSAL 

### F INAL 

### P ROPOSAL 

### S UPPORTING 

### ANALYSIS
RA-1 Fenestration U-factor and SHGC. U-0.40 to 0.35 (CZ 2), U-0.32 to 0.20 (CZ 4-8); SHGC-0.25 to 0.2 or 0.15 (CZ 1-3). The lower SHGC would not apply if the orientation is advantageous or appropriate shading devices in place. RA-1 Draft Proposal Pending Pending

RA-2 Roof/ceiling resistance to heat gain (R402.2). Require either radiant barrier or cool roof in the hottest climate zones. RA-2 Draft Proposal Pending Pending

RA-3 Heat recovery ventilation (R403.5). Require heat recovery in colder climate zones when mechanical ventilation is required. RA-3 Draft Proposal Pending Pending

RA-4 Domestic water heating (R403.4). Require a desuperheater, tankless water heater, heat pump water heater, solar water heater, or improved energy factor on a standard water heater. RA-4 Draft Proposal Pending Pending

RA-5 Lighting Controls (R404.1). Require occupancy sensors or other automatic controls for lighting in selected areas of the home (closets, bathrooms, garages, outdoor lighting, etc.). RA-5 Draft Proposal Pending Pending



### Concepts that extend the flexibility and usability of the code (RB) C ONCEPT 

### # C ONCEPT

### N AME

### /D ESCRIPTION 

### D RAFT 

### P ROPOSAL 

### F INAL 

### P ROPOSAL RB-1 Direct performance compliance path. This would be a pure performance metric not referenced to any prescriptive baseline (an energy use intensity [EUI], a HERS rating, etc). Could replace the existing prescriptive and performance paths or be an alternative compliance path. Pending Pending

RB-2 Restoration of equipment tradeoffs (R405, R402). To foster the use of systems-design concepts and whole-house analysis tools and in light of recently increased Federal minimum equipment efficiencies, restore the ability to do equipment efficiency trade-offs to the code in such a manner as to increase flexibility in compliance without compromising overall efficiency. Pending Pending

RB-3 Correct thermal distribution system specifications in performance-path [Table R405.5.2(1)]. Add standard reference design specification for thermal distribution systems. RB-3 Draft Proposal Pending

RB-4 Addition of Broomfield County, Colorado, to county/zone list (Table R301.1). Supply missing county. RB-4 Draft Proposal Pending

RB-5 Elimination of ambiguity in 3⁄4-in hot water pipe insulation requirements (R403.4.2, Table R403.4.2). Modify code text to match 5-foot lower limit of Table R403.4.2. RB-5 Draft Proposal Pending

RB-6 Correction of section reference in Heating Systems row of performance path [Table R405.5.2(1)]. Change "R403 of the IECC–Commercial Provisions" to "C403...". RB-6 Draft Proposal Pending

RB-7 Clarification of footnote “h” (Table R402.1.1). Clarify its meaning and applicability, possibly by eliminating the footnote in favor of a more detailed textual treatment in R402.2. RB-7 Draft Proposal Pending

RB-8 Addition of lighting specifications to performance path [Table R405.5.2(1)]. Clarify the applicability of mandatory lighting requirements to the performance path. RB-8 Draft Proposal Pending

RB-9 Addition of sunroom specifications to performance path [Table R405.5.2(1)]. Reference R402.2.12 and R402.3.5 to clarify tradeoff allowances. RB-9 Draft Proposal Pending

RB-10 Elimination of gap in ventilation requirements (R403.5 vis-à-vis IRC M1507.1 and IRC R303.4). Clarify what is required when envelope leakage is exactly 5 ACH50. RB-10 Draft Proposal Pending

RB-11 For envelope and duct leakage testing, re-categorize maximum allowable leakage rates from mandatory to prescriptive (R402.4 and R403.2.2). Allowing performance-path trade-offs for these would extend flexibility and mitigate risk associated with unexpected post-construction pressure test failures. RB-11a Draft Proposal
RB-11b Draft Proposal Pending