Utah

Primary Contact for State Adoption

Antonio Santos Aguilera
Program Specialist, Energy Efficiency

Governor's Office of Energy Development

60 East South Temple Street
Suite 300
Salt Lake City, UT 84111
United States

antoniosantos@utah.gov

Regional Energy Efficiency Organization

Jim Meyers
Director Buildings Efficiency Program

Southwest Energy Efficiency Project (SWEEP)

United States

jmeyers@swenergy.org

State Profile

Code Type: Commercial Residential
Current State Code 2018 IECC and ASHRAE 90.1-2016 2015 IECC with Amendments
Effective Date
Adoption Date
Enforcement Mandatory Statewide
State Amendment No Yes
Can use COM/REScheck Yes Yes

Certifications

Commercial
Current Model Code ASHRAE Standard 90.1-2007
No

State Code Analysis

Code Type: Residential Commercial
Energy Efficiency
State Amendment Yes No
Amendment Summary

Utah's residential code has several amendments in House Bill 316. Amendments to existing residential provisions remain and keep the "hybrid" compliance approach. Compliance Options are as follows: (3) In IRC, Section N1101.13 (R401.2), add Exception as follows:
1363 "Exception: A project complies if the project demonstrates compliance, using the
1364 software RESCheck 2012 Utah Energy Conservation Code, of:
1365 (a) on or after January 1, 2017, and before January 1, 2019, "3 percent better than
1366 code";
1367(b) on or after January 1, 2019, and before January 1, 2021, "4 percent better than
1368 code"; and
1369(c) after January 1, 2021, "5 percent better than code.""

New amendments to this version include: 

Multi-family dwelling and townhouse shall be tested and verified as having an air leakage rate of not exceeding five air changes per hour.

IECC, Section R403.6.1 is deleted and replaced with the following: "R403.6.1
2031 Whole-house mechanical ventilation system fan efficacy. Fans used to provide whole-house
2032 mechanical ventilation shall meet the efficacy requirements of Table R403.6.1.
2033 Exception: Where an air handler that is integral to tested and listed HVAC equipment is
2034 used to provide whole-house mechanical ventilation, the air handler shall be powered by an
2035 electronically commutated motor."
2036 (15) In IECC, Section R403.6.1, the table is deleted and replaced with the following:
2037 TABLE R403.6.1

MECHANICAL VENTILATION SYSTEM FAN EFFICACY

2039

FAN LOCATION

AIR FLOW RATE
MINIMUM (CFM)

MINIMUM
EFFICACY
(CFM/WATT)

AIR FLOW RATE
MAXIMUM (CFM)

2040

HRV or ERV

Any

1.2 cfm/watt

Any

2041

Range hoods

Any

2.8 cfm/watt

Any

2042

In-line fan

Any

2.8 cfm/watt

Any

2043

Bathroom, utility room

10

1.4 cfm/watt

<90

2044

Bathroom, utility room

90

2.8 cfm/watt

Any

2045[(14)] (16) In IECC, Section R406.4, the table is deleted and replaced with the
2046following:
2047TABLE R406.4
2048MAXIMUM ENERGY RATING INDEX

039

FAN LOCATION

AIR FLOW RATE

MINIMUM (CFM)

MINIMUM
EFFICACY
(CFM/WATT)

AIR FLOW RATE

MAXIMUM (CFM)

2040

HRV or ERV

Any

1.2 cfm/watt

Any

2041

Range hoods

Any

2.8 cfm/watt

Any

2042

In-line fan

Any

2.8 cfm/watt

Any

2043

Bathroom, utility room

10

1.4 cfm/watt

<90

2044

Bathroom, utility room

90

2.8 cfm/watt

Any

2045[(14)] (16) In IECC, Section R406.4, the table is deleted and replaced with the    

2049

CLIMATE ZONE

ENERGY RATING INDEX

2050

3

65

2051

5

69

2052

6

68

Model Code Savings Potential

Statewide Savings Potential (2010-2030) Residential Commercial
Cost $1.13B $0.20B
Energy (primary) 127MBtu 27MBtu
Consumer Cost Savings Residential
per Home
Commercial
per 1,000 ft2
Annual ($) $306 $109
Annual (%) 20.4%
Life-cycle (30 year) $3473 $1660
Simple Payback 7.2 years 6.2 years
Positive Cash Flow 1.1 years

Compliance

Code Type: Residential Commercial
Field Study No No
Training Program No No

Resources

Additional Information

    A Utah Uniform Building Standards Act was passed in 1953. In January 1976 a bill was passed that provided for the adoption of an energy conservation code for state buildings, suggested voluntary compliance by the state's political subdivisions, and recommended voluntary compliance by the state's building industry. In March 1977 legislation was passed requiring the Building Board to promulgate an energy conservation code and providing political subdivisions and the State Board of Education authority to adopt their own code or a modified version of the state code. Effective January 1978, a code based on the Model Code for Energy Conservation (MCEC) went into effect. In July 1993 the Uniform Building Standards Act was amended to provide that the Division of Professional Licensing, along with the Building Code Commission, adopt by rule the specific edition of the National Electrical Code (NEC), Uniform Building Code (UBC), Uniform Mechanical Code (UMC), and Uniform Plumbing Code (UPC) to be used as the state standard. Power was also given to adopt successor editions of the adopted codes. On February 14, 1995, amendments adopted Appendix Chapter 13 of the 1994 UBC with a sole reference to the 1993 MEC for low-rise residential buildings and a sole reference to ASHRAE/IESNA 90.1-1989 for high-rise residential and commercial buildings. Amendments to Appendix Chapter 13, Section 1302.2, of the UBC were adopted effective July 1, 1998, indicating low-rise residential buildings shall be designed to comply with the requirements of the 1995 MEC. Commercial and high-rise residential buildings shall be designed to comply with the requirements of the Energy Code for Commercial and High-Rise Residential Building, which is a codification of ASHRAE/IESNA 90.1-1989, Energy Efficient Design of New Buildings except Low-Rise Residential Buildings. The 1995 Council of American Building Officials (CABO) Model Energy Code (MEC) was amended in Section 502.2.1 by referring to different requirements for metal stud framing. Specifically, the Uw (thermal transmittance for an opaque wall [w]) for a metal stud wall must be as published in the ASHRAE Handbook of Fundamentals, using an approved ASHRAE series or parallel approach calculation, or U-values shown in the "Users Manual for ASHRAE/IESNA 90.1-1989." The codified version of ASHRAE/IESNA Standard 90.1-1989 was amended to allow building officials to approve designs which do not conform where in his/her opinion full compliance is physically and/or economically impractical. On January 1, 2007, the 2006 IECC with reference to ASHRAE 90.1-2004 became effective. Effective May 12, 2009, the Utah State Legislature became the exclusive authority for the adoption of the building codes, including an energy code. On July 1, 2010, the 2009 IECC with reference to ASHRAE 90.1-2007 became effective with the following state-wide amendment "IRC, Chapter 11, is deleted and replaced with Chapter 11 of the 2006 IRC and Chapter 4 of the 2006 IECC".

    On October 20, 2010, Utah legislators turned down the adoption of the 2009 IECC for residential buildings. In January of 2012 it was reintroduced in Bill 262.

    On March 20, 2015, 2012 IECC with by reference to ASHRAE 90.1-2010 with amnendments and 2012 IECC with amendments for residential and became effective July 1, 2015.

    Utah State Building Board raised the High Performance Building Rating System standards to require all new state buildings to achieve LEED Silver certification. Specifically, new building projects must achieve the following credits: WE Credit 1.1, EA Credit 3, EQ Credit 3.1, EQ Credit 4.1, EQ Credit 4.2.

    Changes to the energy code are submitted to the Uniform Building Code Commission. The proposed change is reviewed by the Commission at a monthly meeting to decide if it warrants further consideration. The Commission also examines if enforcement will be enacted as a statewide amendment or restricted to a specific locality. Based upon further consideration, the Commission submits their recommendation to the Business and Labor Interim Committee of the Utah State Legislature. The Utah State Legislature is vested with the authority to adopt energy code. Enforcement by the local enforcement agency is mandatory once changes are adopted by the Utah State Legislature.

    The energy code is part of the enforcement process for the state building code, which is mandatory statewide. Educational and awareness programs have improved compliance with the energy code requirements. The Division of Facilities Construction Management is responsible for enforcement for all state-owned or -funded buildings.

    All residential buildings (one- and two-family dwellings, and multi-family dwellings three stories high and less) comply with the 2018 IECC using the compliance pathways, plan submittal, and plan review as specified within that code. Commercial and high-rise residential buildings that must comply with 2018 IECC or ASHRAE/IESNA 90.1-2016 follow the compliance pathways in that code and go through a similar plan submittal and plan review process. Plans and specifications must be submitted when required by the local jurisdiction. Field inspections, as part of the normal building inspection process, are required prior to the issuance of a certificate of occupancy. If the local compliance agency refuses to establish a method of appeal to their interpretation and application of the State Uniform Building Standards, the appealing party may petition the Building Code Commission for agency action on the issue.