2023 Utah Code › Title 15A - State Construction and Fire Codes Act › Chapter 3 - Statewide Amendments Incorporated as Part of State Construction Code › Part 7 - Statewide Amendments to International Energy Conservation Code › Section 701 - General provisions.

Effective 7/1/2023
15A-3-701.
General provisions.
The following is adopted as an amendment to the IECC to be applicable statewide:
(1) IECC, Section C405.11, is deleted and replaced with the following: "C405.11 Automatic receptacle control. Automatic receptacle control to be optional and decided by property owner."
(2) In IECC, Section R103.2, all words after the words "herein governed." are deleted and replaced with the following: "Construction documents include all documentation required to be submitted in order to issue a building permit."
(3) In IECC, Section R303.3, all wording after the first sentence is deleted.
(4) In IECC, Section R401.2, a new number 4 is added as follows:
"4. Compliance may be shown by demonstrating a result, using the software RESCheck 2012 Utah Energy Conservation Code, of:
(a) on or after January 1, 2017, and before January 1, 2019, "3 percent better than code";
(b) on or after January 1, 2019, and before January 1, 2021, "4 percent better than code"; and
(c) after January 1, 2021, "5 percent better than code"."
(5) In IECC, Table R402.2, in the column entitled MASS WALL R-VALUE, a new footnote j is added as follows:
"j. Log walls complying with ICC400 and with a minimum average wall thickness of 5 inches or greater shall be permitted in Zones 5 through 8 when overall window glazing has a .31 U-factor or lower, minimum heating equipment efficiency is, for gas, 90 AFUE, or, for oil, 84 AFUE, and all other component requirements are met."
(6) In IECC, Section R402.2.1, a new section is added as follows: "R402.2.1.1. Unvented attic and unvented enclosed rafter assemblies. Unvented attic and unvented enclosed rafter assemblies conforming to Section R806.5 shall be provided with an R-value of R-22 (maximum U-Factor of 0.045) in Climate Zone 3-B or an R-value of R-26 (maximum U-factor of 0.038) in Climate Zones 5-B and 6-B provided all the following conditions are met:
1. The unvented attic assembly complies with the requirements of the International Residential Code, Section R806.5.
2. The house shall attain a blower door test result < 2.5ACH 50.
3. The house shall require a whole house mechanical ventilation system that does not rely solely on a negative pressure strategy (must be positive, balanced or hybrid).
4. Where insulation is installed below the roof deck and the exposed portion of roof rafters are not already covered by the R-20 depth of the air-impermeable insulation, the exposed portion of the roof rafters shall be wrapped (covered) by minimum R-3 unless directly covered by drywall/finished ceiling. Roof rafters are not required to be covered by minimum R-3 if a continuous insulation is installed above the roof deck.
5. Indoor heating, cooling and ventilation equipment (including ductwork) shall be inside the building thermal envelope.
(7) In IECC, Section R402.4.1, in the first sentence, the word "and" is deleted and replaced with the word "or".
(8) In IECC, Section R402.4.1.1, the last sentence is deleted and replaced with the following: "Where allowed by the code official, the builder may certify compliance to components criteria for items which may not be inspected during regularly scheduled inspections."
(9) In IECC, Section R402.4.1.2, the following changes are made:
(a) In the first sentence:
(i) "The building or dwelling unit" is deleted and replaced with "A single-family dwelling";
(ii) after January 1, 2019, replace the word "five" with "3.5"; and
(iii) the words "in Climate Zones 1 and 2, and three air changes per hour in Climate Zones 3 through 8" are deleted.
(b) The following sentence is inserted after the first sentence: "A multi-family dwelling and townhouse shall be tested and verified as having an air leakage rate of not exceeding five air changes per hour."
(c) In the third sentence, the word "third" is deleted.
(d) The following sentence is inserted after the third sentence: "The following parties shall be approved to conduct testing: Parties certified by BPI or RESNET, or licensed contractors who have completed training provided by Blower Door Test equipment manufacturers or other comparable training."
(10) In IECC, Section R403.3.3, the exception for duct air leakage testing is deleted and replaced with the following:
(a) on or after January 1, 2017, and before January 1, 2019, with the following: "Exception: The total leakage test is not required for systems with all air handlers and at least 65% of all ducts (measured by length) located entirely within the building thermal envelope.";
(b) on or after January 1, 2019, and before January 1, 2021, with the following: "Exception: The duct air leakage test is not required for systems with all air handlers and at least 75% of all ducts (measured by length) located entirely within the building thermal envelope."; and
(c) on or after January 1, 2021, with the following: "Exception: The duct air leakage test is not required for systems with all air handlers and at least 80% of all ducts (measured by length) located entirely within the building thermal envelope."
(11) In IECC, Section R403.3.3, the following is added after the exception:
"The following parties shall be approved to conduct testing:
1. Parties certified by BPI or RESNET.
2. Licensed contractors who have completed training provided by Duct Test equipment manufacturers or other comparable training."
(12) In IECC, Section R403.3.4:
(a) in Subsection 1, the number 4 is changed to 8, the number 113.3 is changed to 170, the number 3 is changed to 6, and the number 85 is changed to 114.6; and
(b) in Subsection 2:
(i) on or after January 1, 2017, and before January 1, 2019, the number 4 is changed to 8 and the number 113.3 is changed to 226.5;
(ii) on or after January 1, 2019, and before January 1, 2021, the number 4 is changed to 7 and the number 113.3 is changed to 198.2; and
(iii) on or after January 1, 2021, the number 4 is changed to 6 and the number 113.3 is changed to 169.9.
(13) In IECC, Section R403.3.5, the words "or plenums" are deleted.
(14) In IECC, Section R403.5.3, Subsection 5 is deleted and Subsections 6 and 7 are renumbered.
(15) IECC, Section R403.6.1, is deleted and replaced with the following: "R403.6.1 Whole-house mechanical ventilation system fan efficacy. Fans used to provide whole-house mechanical ventilation shall meet the efficacy requirements of Table R403.6.1.
Exception: Where an air handler that is integral to tested and listed HVAC equipment is used to provide whole-house mechanical ventilation, the air handler shall be powered by an electronically commutated motor."
(16) In IECC, Section R403.6.1, the table is deleted and replaced with the following:
"TABLE R403.6.1
MECHANICAL VENTILATION SYSTEM FAN EFFICACY
FAN LOCATION  AIR FLOW RATE MINIMUM (CFM) MINIMUM EFFICACY (CFM/WATT) AIR FLOW RATE MAXIMUM (CFM)
HRV or ERV  Any  1.2 cfm/watt  Any
Range hoods  Any  2.8 cfm/watt  Any
In-line fan  Any  2.8 cfm/watt  Any
Bathroom, utility room  10  1.4 cfm/watt  <90
Bathroom, utility room  90  2.8 cfm/watt  Any"
(17) In IECC, Section R406.5, the table is deleted and replaced with the following:
"TABLE R406.5
MAXIMUM ENERGY RATING INDEX
CLIMATE ZONE  ENERGY RATING INDEX
3  65
5  69
6  68"
(18) A new IECC, Section R403.7.1, is added as follows: "R403.7.1 Qualifications. An individual performing load calculations shall be qualified by completing HVAC training from one of the following:
1. HVAC load calculation education from ACCA;
2. A recognized educational institution;
3. HVAC equipment manufacturer's training; or
4. Other recognized industry certification."
Amended by Chapter 209, 2023 General Session