Nevada

Current News: 

The 2018 International Energy Conservation Code (IECC) was adopted as the minimum standard in Nevada and went into effect June 26, 2018. The office is required to adopt the latest version of the IECC every third year. Amendments to the 2018 IECC are shown under the commercial and residential adoption information.

Current Code:
2018 IECC with Amendments
Amendments / Additional State Code Information:
  • C402.1.3 Insulation component R-value-based method o Heated Slab Insulation. R-5 insulation has been added as a requirement in Table C402.1.3 for heated slabs in all climate zones.
  • C402.1.4 Assembly U-factor, C-factor or F-factor based method o Garage Door Glazing. A U-factor of .31 has been added to table C402.1.4 as a minimum requirement for garage doors with glazing.
  • C402.2.7 Airspaces o Thermal Properties. When the thermal properties of airspaces are calculated as part of the thermal wall assembly, these airspaces must be enclosed in an unvented cavity designed to minimize airflow into and out of the cavity.
  • C404.1 Lighting Equipment
    •  A proposal to increase the percentage of high efficacy lamps in permanently installed fixtures from 75% to 90% passed. This will remain a mandatory requirement in the code.
  •  C404.2 Service water-heating equipment performance efficiency
    •  Water heater efficiencies. Updated to current federal water heater efficiencies.
  • C405.2 Lighting controls o Daylighting controls. Lighting systems shall be provided with controls that comply with Sections C405.2.1 through C405.2.6, with exceptions.
  • C405.2.1, C405.2.1.1, C405.2.1.3 (NEW) Occupant sensor requirements
    • Expanded occupant sensor requirements to include open office spaces.  
    • Reduction allowed Light Power Densities (LPD) for interior and exterior lighting systems.
  • C406 Option Packages
    •  Added option packages for increased envelope efficiency and reduced air leakage buildings.
  • C407.3 Commercial Renewable Energy Cost Reduction
    •  A maximum on-site renewable energy cost reduction of 5% is now a component of C407.3 the Performance based compliance approach. In addition to limiting the amount of renewable energy offset. 
    • Requires documentation which demonstrates the reduction in energy use associated with on-site renewable energy.
    • Clarifies that renewable energy purchased from off-site sources shall be the same in the standard reference design and proposed design.

Editorial Revisions:

  •  Adds clarifying language to the air barrier definition.
  •  Adds clarifying language to the air barrier construction section.
  •  Adds definition for cavity insulation.
  •  Revises definitions for skylights and vertical fenestration.
  •  Creates two new sections for below grade wall insulation and opaque doors.
  •  Reorganizes daylight zone requirements and clarifies requirements for top lit zones.
  •  Clarifies language in section C402.5.3 Rooms Containing Fuel Burning Appliances


Approved Compliance Tools: Can use COMcheck
Approximate Energy Efficiency: Equivalent to 2018 IECC
Effective Date:
Jun. 11, 2018
Adoption Date:
Jun. 26, 2018
Code Enforcement:
Mandatory
DOE Determination: ASHRAE 90.1-2007: Yes
ASHRAE 90.1-2010: No
ASHRAE 90.1-2013: No

Energy cost savings for Nevada resulting from the state updating its commercial and residential building energy codes in accordance with federal law are significant, estimated to be on the order of nearly $180 million annually by 2030.
Nevada DOE Determination Letter, May 31, 2013

Nevada State Certification of Commercial Building Energy Codes


Current Code:
2018 IECC with Amendments
Amendments / Additional State Code Information:

Specific Residential Proposals that Reduce Energy Efficiency:

  • R402.1 Log Homes
    •  Adds an exception to the residential thermal envelope requirements for log homes complying with ICC-400.
    • This standard describes an alternative method for log home compliance with the building thermal requirements in the IECC.

Residential Proposals that Improve or Protect Energy Efficiency: 

  • Table R402.1.2, Table R402.1.4 Improved window efficiency
    • Lowers vertical fenestration U-factors in CZ 3 & 4 from 0.35 to 0.32 and CZ 5-8 from 0.32 to 0.30.
  • R402.1.2 Heated Slab Insulation
    • R-5 insulation has been added as a requirement in Table R402.1.2 for heated slabs in all climate zones.
  • R402.4.1.1 Air Barrier & Insulation
    • Added language to the air barrier and insulation installation table will specify the following:
    • Supply and return register boots must be sealed to the subfloor or drywall.
    • Recessed lighting must be sealed to the finished surface.
    • Space behind electrical/phone boxes need to be insulated.
    • ICC/RESNET Standard 380 now referenced as envelope leakage testing option.
  • R403.3.6 Buried Ductwork in Attic
    • Ducts that are tested to have a maximum leakage rate of 1.5 cfm25/100 SF to the outside, are insulated with ≥ R-8 insulation, and have at least R-19 insulation above and to the sides of the ducts, count as being in conditioned space.
  • R403.6.1 ERV/HRV Fan Efficiency
    • A minimum fan efficiency of 1.2 cfm/watt has been added for HRV and ERVs.
  • R404.1 Lighting Equipment
    • A proposal to increase the percentage of high efficacy lamps in permanently installed fixtures from 75% to 90% passed. This will remain a mandatory requirement in the code.
  • Table R406.4 Energy Rating Index
    • Target less stringent, but clarified role of on-site renewable energy.
    • Increases maximum ERI scores from (51-55) to (57-62) and clarifies that where on-site renewable energy is included for compliance, the building shall meet the mandatory requirements of R406.2 and the thermal envelope shall meet or exceed the requirements of the 2015 IECC.
    • ERI scores will be increased from 55 to 61 in CZ 5 and from 51 to 57 in CZ3.
    • Where on-site renewable energy is included in the ERI calculation, buildings must meet or exceed the thermal envelope requirements in Table R402.1.2 of the 2015 IECC.
    • The 2009 IECC envelope backstop will remain in effect for buildings without onsite generation.
    • RESNET Standards Referenced
    • The ANSI/RESNET/ICC 301-2014 is now a referenced standard in the code as the basis for the ERI calculation. Additionally, ANSI/RESNET/ICC 380-2016 is now a referenced standard for building envelope testing.


Approved Compliance Tools: Can use REScheck
Approximate Energy Efficiency: Equivalent to 2018 IECC
Effective Date:
Jun. 26, 2018
Adoption Date:
Jun. 11, 2018
Code Enforcement:
Mandatory
Jurisdictions:
DOE Determination: 2009 IECC: Yes
2012 IECC: No
2015 IECC: No

Energy cost savings for Nevada resulting from the state updating its commercial and residential building energy codes in accordance with federal law are significant, estimated to be on the order of nearly $180 million annually by 2030.
Nevada DOE Determination Letter, May 31, 2013

Nevada State Certification of Residential Building Energy Codes

Code Change Process:
Regulatory
Code Change Cycle:
Reviewed
Timeline of Cycle:
Every 3 years
Next Code Update: Residential
  • Date - 07/01/2021

Commercial
  • Date - 06/01/2021
  • Code - 2021 IECC

State Owned / Funded Buildings

On June 8, 2009, Governor Gibbons signed into law SB 395, containing a provision that requires the State Public Works Board to adopt standards and performance guidelines concerning the efficient use of water and energy for state-owned and operated buildings. Effective July 1, 2009, this provision amends Chapter 341 of NRS. The State Public Works Board may consider standards as set forth in LEED, Green Globes, Energy Star, ASHRAE, FEMP, and IECC.

Adoption Process

Assembly Bill 3 (22nd Special Session) became law as NRS 701.220 which enforces adoption of regulations for energy conservation in buildings, exemptions, applicability and enforcement, as well as procedure for adoption of building energy codes. The state energy code must be updated to the most recent version every three years. Adoption of the state energy code is required by all local government entities authorized by law to adopt and enforce a building code. On June 15, 2007, Governor Gibbons signed Assembly Bill 621 into law. Among the provisions passed in the wide-reaching energy efficiency and renewable energy bill is an update making various changes relating to the application procedures for and provision of tax abatements and exemptions based upon the Leadership in Energy and Environmental Design Green Building Rating System.

Enforcement Process

The city or county enforces the code except for state-owned and -funded buildings, which are regulated by the Nevada Public Works Board (NPWB). The NPWB generally requires the plans to be stamped by a registered engineer or architect to indicate compliance with the energy code requirements. Plans and specifications must be submitted when required by the provisions of the MEC. Field inspections are performed by the local jurisdiction during established construction inspections. Interpretations are the responsibility of the local jurisdiction.

Compliance Process

The required envelope compliance pathways, plan submittal requirements, and requirements for engineer signatures are those contained in the 2018 IECC.

Background

Nevada's first energy code, "Energy Conservation Standards for New Building Construction," was adopted on January 1, 1978. This code, based on ASHRAE Standard 90-75, was written by the state and formulated by the Nevada Department of Energy. All cities and counties were required to enforce the energy code requirements. The Nevada Department of Energy was disbanded in 1983. Between 1983 and 1986, the state did not support or enforce this energy code.

In 1985 the legislature gave the Nevada Office of Community Services authority to formulate new statewide standards for energy conservation in new buildings. Adopted on July 8, 1988, the "Regulations for the Conservation of Energy in New Building Construction" were formulated based on the 1986 MEC with minor state amendments. This code is applicable only in areas where the local jurisdiction had not previously adopted an energy code. This remains the basis for the statewide energy code. The Nevada Office of Community Services was dissolved in the fall of 1993. Currently, the state does not actively support or enforce this energy code.

In 1995 the Nevada State Energy Office sought authority to upgrade the state energy codes via legislation submitted to the state legislature, but the Senate Finance Committee effectively killed the bill by failing to act on it. The legislation would have adopted the 1992 MEC for all low-rise residential buildings and the codified version of the ANSI/ASHRAE/IES 90.1-1989 for all other buildings. The state is pursuing voluntary compliance strategies. The 1995 legislature imposed a two year moratorium on the adoption of new state regulations.

The Nevada State Energy Office is currently working to link the 1992, 1993, and 1995 editions of the MEC to a home energy rating system. Nevada's EPAct certification, extended one year, reflects the Nevada legislature's inaction.

On May 28, 2009, Gov. Jim Gibbons signed into law legislation (SB 73) that revises the process of updating the state's building energy codes by establishing the standards adopted by the Nevada State Office of Energy as the minimum standards for building energy efficiency and conservation. The law requires local governments to adopt the codes set by the Office of Energy and to enforce them (they are also allowed to adopt more energy efficient standards provided they give notice to the Office of Energy).

The law mandates the adoption of the most recent version of the International Energy Conservation Code (IECC) and requires the adoption of the most recent updated version of the IECC every three years. The Office of Energy must still hold public hearings in three different locations in the state after giving 30 days notice of such hearings before adopting any new standards.

On November 10, 2011, The Nevada State office of Energy adopted the 2009 IECC with an effective date of July 1, 2012.  Jurisdictions in southern Nevada adopted the 2009 IECC effective July 5, 2011.