ICC Board Agrees with NAHB on Codes Appeal

Codes and Standards
Published

The ICC Board of Directors Wednesday agreed with NAHB's appeal related to a proposed change to the International Energy Conservation Code (IECC) that dealt with the efficiency of water heaters. NAHB and others argued, and ICC agreed, that the changes would have preempted federal law or would have exposed adopting jurisdictions to potential litigation related to the proposed requirements.

The ICC Board decided to reject RE126-19 (and RE107-19) on the basis that "potentially preempted provisions in the I-Codes is inconsistent with the spirit, intent and mission of the Code Council." In addition to NAHB, the American Gas Association, American Public Gas Association and American Heating Refrigeration Institute filed similar appeals.

RE126-19 was a proposal submitted by the National Resources Defense Council that put additional requirements on water heating products. NAHB and the other appellants believed the requirements were inconsistent with the National Appliance and Energy Conservation Act (NAECA) by attempting to institute requirements inconsistent with federal law and would put ICC and adopting entities at risk of legal action should the proposed requirements be instituted.

While the ICC disagreed with one point in the appeal that its development process was violated, the Board did agree that incorporating requirements contrary to federal law would be problematic. Accordingly, the Board determined that the approved language from RE107-19 and RE126-19 will not be included in the 2021 International Residential Code (IRC) or IECC.

This was the first of three rulings by the Board on NAHB appeals. The final ICC Board decision on the last two appeals related to scope and intent and the codes development process and voting eligibility are expected around mid-October.

For more information about the codes appeals, visit nahb.org.

Subscribe to NAHBNow

Log in or create account to subscribe to notifications of new posts.

Log in to subscribe

Latest from NAHBNow

Workforce Development

Mar 20, 2026

NAHB HBCU Event Cultivates Workforce Pipeline

NAHB’s Historically Black College and University (HBCU) Student Leadership program hosted the third annual Black Builder and Mentor Mixer at the 2026 International Builders’ Show in Orlando. The event welcomed 160 students and mentors, including students from 10 HBCUs who participated in the leadership program’s third cohort.

Economics

Mar 19, 2026

Fed Holding Pattern Continues

The Fed continued its current pause for rate reductions at the conclusion of the March meeting of the Federal Open Market Committee, the central bank’s monetary policy body.

View all

Latest Economic News

Economics

Mar 19, 2026

New Home Sales Decline in January on Weather Disruptions

New home sales declined in January, reflecting typical monthly volatility as well as weather-related disruptions.

Economics

Mar 19, 2026

Fourth Quarter 2025 Multifamily Construction Data

According to NAHB analysis of quarterly Census data, the count of multifamily, for-rent housing starts increased year-over-year during the fourth quarter of 2025.

Economics

Mar 18, 2026

Holding Pattern Continues for the Fed

The Fed continued its current pause for rate reductions at the conclusion of the March meeting of the Federal Open Market Committee, the central bank’s monetary policy body.